DIMPLEX BLF3451 34 Inch Wall Mounted Electric Fireplace Owner’s Manual

June 10, 2024
Dimplex

DIMPLEX BLF3451 34 Inch Wall Mounted Electric Fireplace

DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-
product

Product Information:

This product is a Model BLF3451 UL Part Number 6909590100 electric firebox manufactured by Dimplex. The firebox comes with an IR multifunction remote control which can control the unit’s different features. The Floating DisplayTM is a feature that displays the temperature and other information on the fireplace.

Important Safety Information:

Before attempting to service this fireplace, always read the manual first. It is important to follow all warnings and safety instructions contained in the manual to prevent personal injury or property damage. This product should only be repaired by qualified technicians or service agencies.

Product Usage Instructions:

To use the electric firebox, follow the instructions below:

  1. Properly install the firebox before using it.
  2. To turn the unit on and off, press the Standby button on the remote or the button onthe upper right of the unit.
  3. To turn the flame effect on and off, press the corresponding button on the remote.
  4. To turn the heater on and off, press the Heat ON/OFF button on the remote or the unit.
  5. To disable or enable the heater, press and hold both the and buttons on the unit for 2 seconds.
  6. To adjust the set point on the unit or remote, press the corresponding buttons.
  7. To change color themes, repeatedly press the corresponding button on the remote or unit.
  8. If any button is pressed, the intake temperature will be displayed on the Floating DisplayTM for 5 seconds.

Note : The heater may emit a slight odor when first used, which is normal and harmless. When the heater is switched off, there is a 60-second fan delay before it turns off. The fireplace can be operated in Heat Only Mode, indicated by a continuously displayed icon on the Floating DisplayTM. To operate the remote control correctly, it must be pointed towards the FloatingDisplayTM.

IMPORTANT SAFETY INFORMATION: Always read this manual first before attempting to service this fireplace. For your safety, always comply with all warnings and safety instructions contained in this manual to prevent personal injury or property damage.

Always use a qualified technician or service agency to repair this fireplace.
NOTE : Procedures and techniques that are considered important enough to emphasize.
CAUTION : Procedures and techniques which, if not carefully followed, will result in damage to the equipment.
WARNING : Procedures and techniques which, if not carefully followed, will expose the user to the risk of fire, serious injury, or death.

Operation

DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig-
\(1\)

WARNING: This electric firebox must be properly installed before it is used.
The unit can be controlled by either the manual controls which are located on the upper right of the fireplace or the remote (Figure 13 & 14).
The fireplace is supplied with an IR multifunction remote control.
NOTE : To operate correctly, the remote control must be pointed towards the Floating DisplayTM

Standby

Turns the unit On and Off.
→ Activated by pressing the Standby button on the remote or the unit.
The unit will turn on with the same functions that it was set to when it was turned Off and the intake temperature will be indicated on the Floating DisplayTM.
NOTE : When any button is pressed the intake temperature will be displayed on the Floating DisplayTM for 5 seconds.

Flame Effects

Turns the flame effect On and Off.
→ Activated by pressing the button on the remote.

Heat ON/OFF

Turns the heater On and Off.
→ Activated by pressing the button on the unit or the remote.
Indicated by the icon and the intake temperature being displayed on the Floating DisplayTM, for 5 seconds before turning off.
NOTE : After the heater is switched off, there is a 60 second fan delay, where the fan will continue running before turning off.
NOTE : The unit can be operated in Heat Only Mode. When the unit is only running with the heater, the icon will continuously be displayed on the Floating DisplayTM.
NOTE : The heater may emit a slight, harmless odor when first used. This odor is a normal condition caused by initial heating of internal heater parts and will not occur again.

Thermostat Controls

Adjusts the temperature set point to your individual requirements. Once the desired set temperature is reached the heater will turn off. The heater will cycle on and off to maintain the desired set temperature. The default temperature setting is 72°F (22°C). → Adjusted by pressing the to decrease the set point and the to increase the set point on the unit or the remote.
The Floating DisplayTM will indicate the temperature set point as it is adjusted

NOTE : Holding the and the buttons down for two seconds, on the unit, will change the temperature from °C to °F, or vice versa

Disable Heat

If desired, depending on the season, the heater on the unit can be disabled. The unit will operate in the same fashion, with remainder of the controls.
Pressing the and buttons on the unit at the same time and holding for 2 seconds will disable and enable the heater.
NOTE : When the heater has been disabled and either the or the is pressed the Floating DisplayTM will indicate “–”.

Color Themes

Different presets of ambient lighting color combinations contained in the unit.
→ Changed by repeatedly pressing the corresponding button on the remote or the unit.
Cycles through the different preset ambient lighting settings of the unit, this includes different combinations of colours of the flame base and media lighting.
NOTE : The last theme of the cycle is a prism where the unit cycles through a variety of colours. Pressing the button stops the cycling and holds the unit on the preferred color, indicated by a “U” – Unfreeze or a “F” – Freeze on the display.

Brightness

Changes the brightness of the lights in the unit. → Adjusted by repeatedly pressing the corresponding button on the remote.
Indicated by the second digit on the Floating Display™ changing to show: “H” (high), and “L” (low).

Sleep Timer

The Sleep Timer can be set to automatically shut off the fireplace after a preset time (from 30 minutes to 8 hours). → To set the timer press the timer button on the remote, repeatedly, until the desired time is displayed.
The Floating DisplayTM will display the different times as it is adjusted. Once the timer has begun, pressing the button will display the time remaining before the unit turns Off.
NOTE : The Sleep Timer can be cancelled at any time by pressing the button repeatedly until the sleep timer displays nothing.

Resetting the Temperature Cutoff Switch

Should the heater overheat, an automatic cut out will turn the whole unit off and it will not come back on without being reset. It can be reset by turning the power to the unit and waiting 5 minutes before turning the unit back on.
CAUTION : If you need to continuously reset the heater, unplug the unit and call technical support at 1-888-346-7539.

Remote Control Battery Replacement
To replace the battery:

  1. Slide battery cover open on the remote control.
  2. Correctly install one 3 Volt (CR2032 [longer life] or CR2025) battery in the battery holder.
  3. Close the battery cover.

Battery must be recycled or disposed of properly. Check with your Local Authority or Retailer for recycling advice in your areaDIMPLEX-BLF3451-34
-Inch-Wall-Mounted-Electric-Fireplace-fig- \(11\)

Maintenance

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of fire, electric shock or damage to persons.
NOTE : The fireplace should not be operated with an accumulation of dust or dirt on or in the unit, as this can cause a build up of heat and eventual damage. For this reason the heater must be inspected regularly, depending upon conditions and at least at yearly intervals.

Partially Reflective Glass Cleaning

The partially reflective glass is cleaned in the factory during the assembly operation. During shipment, installation, handling, etc., the partially reflective glass may collect dustparticles; these can be removed by dusting lightly with a clean dry cloth.
To remove fingerprints or other marks, the partially reflective glass can be cleaned with a damp cloth. The partially reflective glass should be completely dried with a lint free cloth to prevent water spots. To prevent scratching, do not use abrasive cleaners.

Fireplace Surface Cleaning

Use only a damp cloth to clean painted surfaces of the fireplace. Do not use abrasive cleaners.

Servicing

Except for installation and cleaning described in this manual, an authorized service representative should perform any other servicing.

Exploded Parts Diagram

DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-
Fireplace-fig- \(12\)

Replacement Parts List

  • Element. . . . . . . . . . . . . . . . . . . . . . . . .2200510300RP
  • Partially Reflective Glass . . . . . . . . . . . 5902700100RP
  • Blower . . . . . . . . . . . . . . . . . . . . . . . . . .5300170300RP
  • Front Glass . . . . . . . . . . . . . . . . . . . . . .6909140100RP
  • Power Cord . . . . . . . . . . . . . . . . . . . . . .4100190300RP
  • Flicker Motor . . . . . . . . . . . . . . . . . . . . .2000500100RP
  • Flicker Assembly . . . . . . . . . . . . . . . . . 5902720100RP
  • Cutout . . . . . . . . . . . . . . . . . . . . . . . . . .2300201500RP
  • Flame LED Light Strip (Amber). . . . . . . 3001420200RP
  • Switch Board. . . . . . . . . . . . . . . . . . . . .3001520100RP
  • Main Control Board (with Display) . . . . 3001640100RP
  • Remote Control. . . . . . . . . . . . . . . . . . . 6700520200RP
  • LED Light Strip (6) (RGB) (2 per unit). 3001570100RP
  • LED Light Strip (4) (RGB) (2 per unit). 3001570400RP
  • Thermistor. . . . . . . . . . . . . . . . . . . . . . . 3001560600RP
  • Relay Board . . . . . . . . . . . . . . . . . . . . . 3001630100RP
  • Mounting Kit . . . . . . . . . . . . . . . . . . . . . 9600770100RP
  • AC/DC Adapter. . . . . . . . . . . . . . . . . . . 2100250100RP
  • Glass Media . . . . . . . . . . . . . . . . . . . . . 1400070100RP

Accessories

  • River Rocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DFS1314
  • Driftwood Accessory Kit. . . . . . . . . . . . . . . . LF34DWS-KIT

Wiring Diagram

DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-
fig- \(13\)

Preparation for service

NOTE : All components are replaceable from the front of the fireplace while the unit is mounted on the wall, with the exception of replacement of the power cord. ! NOTE: If the power cord needs replacing or if the unit needs to be removed from the wall for any other reason please begin service by following the “PREPARATION FOR SERVICE” instructions, then move on to the section “INSTRUCTIONS FOR REMOVING FROM WALL”.
NOTE : All components are replaceable from the front of the fireplace while the unit is mounted on the wall, with the exception of replacement of the power cord.
NOTE : If the power cord needs replacing or if the unit needs to be removed from the wall for any other reason please begin service by following the “PREPARATION FOR SERVICE” instructions, then move on to the section “INSTRUCTIONS FOR REMOVING FROM WALL”. Tools Required: Phillips head screwdriver
Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin

  1. Disconnect power source.
  2. Unplug the fireplace from the outlet.
  3. If unit has been hard wired for power or outlet is not accessible from the front, turn the breaker off at the electrical panel.
  4. Remove the front glass assembly by removing the 2 screws (1 on the left and 1 on the right side). These screws secure the front glass panel to the inside of the fireplace. (Figure 4)DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(14\)
  5. Lift the front glass assembly off of the 4 mounts located between the outer and inner casing of the fireplace: 2 on the left and 2 on the right. (Figure 3) Carefully place the glass assembly aside in a safe location.
  6. Proceed to the instructions within this manual relating to the repair being performed – see Table of Contents for page number.

Instructions for removing from wall

NOTE : Only required for replacement of the power cord or removal from service.
WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
CAUTION : Follow “Preparation for Service” instructionsbefore proceeding.

Mounting – The fireplace may be mounted in one of 3 methods:

  • Surface Mount
  • Recess Mount – Partial In-Wall
  • Flush Mount (completely in the wall)

Identify the type of mounting and follow the appropriate instructions in the following pages.
CAUTION : To prevent injury or damage, turn off the breaker in your electrical panel prior to attempting

NOTE : If fireplace is hard wired directly to the electrical panel, and there is not enough slack in the wires within the wall to reach your work area, remove the electrical junction box cover located on the bottom right by removing the 2 screws on the front of the cover. Lift the cover off and set aside. Disconnect the 3 wire connectors connected to the power source, taking note of their original configuration

  • Line : Red wire from unit to the line wire power source
  • Neutral: Thin white wire and thick blue wire to neutral wire from power source
  • Thin black wire and thick white wire are left connected and not changed

Surface Mount

Tools Required: Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.

  2. On the bottom of the unit remove the securing screw from the L-bracket. (Figure 5)DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(15\)

  3. Lift the unit up and off of the wall.

  4. Carefully lay the unit down on a solid flat surface with the front of the unit facing up
    NOTE : If the surface you are using as a work area on is a finished surface that is prone to scratches (i.e. hardwood flooring), it is recommended that a protective barrier be used underneath, (i.e. cloth, cardboard, thick plastic).

  5. Proceed to the instructions within this manual relating to the repair being performed – see Table of Contents for page number.

  6. Once repair is complete, reassemble in the reverse order as above.

Recessed Mount – Partial In-wall

Tools Required: Phillips head screwdriver

CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.

  2. Locate and remove the 4 mounting screws located approximately 3 inches deep in the space between the outer and inner casing on the left and right hand side.

  3. There are 2 screws per side, upper and lower going into a stud. (Figure 7)DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(17\)
    CAUTION : The fireplace should be supported while removing the screws to prevent the unit from falling.

  4. Remove the fireplace out of the opening by slightly lifting and pulling forward.

  5. Carefully lay the unit down on a solid flat surface with the front of the unit facing up.
    NOTE : If the surface you are using as a work area is a finished surface that is prone to scratches (i.e. hardwood flooring), it is recommended that a protective barrier be used underneath, (i.e. cloth, cardboard, thick plastic).

  6. Proceed to the instructions within this manual relating to the repair being performed – see Table of Contents for page number.

  7. Once repair is complete, reassemble in the reverse order as above

Flush Mount – Complete In-wall

Tools Required: Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together. 2. Locate and remove the 4 mounting screws inside the unit located on left and right side towards the front.
    There are 2 screws per side, going from the side panels out into the side of the wall stud that frames the fireplace. (Figure 8)DIMPLEX-BLF3451-34-Inch-
Wall-Mounted-Electric-Fireplace-fig- \(18\)
    CAUTION : The unit should be supported while removing the screws to prevent the unit from falling.

  2. Remove the fireplace out of the opening by slightly lifting and pulling forward.

  3. Carefully lay the unit down on a solid flat surface with the front of the unit facing up.
    NOTE : If the surface you are using as a work area is a finished surface that is prone to scratches (i.e. hardwood flooring), it is recommended that a protective barrier be used underneath, (i.e. cloth, cardboard, thick plastic).

  4. Proceed to the instructions within this manual relating to the repair being performed – see Table of Contents for page number.

  5. Once repair is complete, reassemble in the reverse order as above.

Switchboard Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver. Small adjustable wrench
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the 2 screws, that secure the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  2. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  3. Locate the switchboard (Figure 10).

  4. Disconnect the wiring harness from the switchboard.

  5. Remove the switchboard by loosening the nuts on the spacer stands.

  6. Install the new switchboard on the space stands.

  7. Reconnect the wire harness onto the back of the switchboard in its original configuration.

  8. Reassemble in the reverse order as above.
    CAUTION : When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall the panel

Relay Board Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
Tools required: Phillips head screwdriver Needle nosed pliers
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the 2 screws, that secure the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  2. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  3. Locate the relay board (Figure 10).

  4. Transfer the wiring connections from the existing board to the new board.
    NOTE : Using a flat head screwdriver gently pry between the end of the connectors and the board to release the wires.

  5. Remove the relay board off the plastic mounts by pinching the plastic mounting tabs with needle nose pliers. Pull the old board off.

  6. Line up the holes on the board and gently press the new board onto the mounts. Make sure the board is secure.

  7. Reassemble in the reverse order as above.

CAUTION : When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall the panel

AC/DC Adapter Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding.

Tools required: Phillips head screwdriver

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.

  2. Remove the 2 screws, that secure the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  3. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 13)

  4. Remove the Partially Reflective Glass. Carefully place  the glass assembly aside in a safe location.

  5. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  6. Locate the defective AC/DC adapter (Figure 10).

  7. Disconnect wires going to the wire connectors and the wires that are attached to the display / control board. (Figure 14)
    NOTE : Using a flat head screwdriver gently pry between the end of the connectors and the board to release the wires.

  8. Remove the four screws that secure the AC/DC adapter bracket to the controls assembly.

  9. Install the new AC/DC adapter and install all wiring connections.

  10. Reassemble in the reverse order as above.

CAUTION : When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall the panel.

Main Control Board Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding

Tools required: Phillips head screwdriver

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.

  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially

  3. Reflective Glass. (Figure 13)

  4. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.

  5. Locate the defective display / control board (Figure 10).

  6. Disconnect wires from old board and transfer to new board. (Figure 14)
    NOTE : Using a flat head screwdriver gently pry between the end of the connectors and the board to release the wires.

  7. Remove the relay board off the plastic mounts by pinching the plastic mounting tabs with needle nose pliers. Pull the old board off.

  8. Line up the holes on the board and gently press the new board onto the mounts. Make sure the board is secure.

  9. Reassemble in the reverse order as above.
    CAUTION : When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall the panel.

Flicker Motor Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
Tools required: Phillips head screwdriver Short handled Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. In the bottom right hand of the unit, remove both of the access covers. (Figure 11)
  2. Remove the 2 screws holding the flicker motor to the bracket.
  3. Holding the rubber gasket on the shaft, carefully remove the entire assembly.
  4. Disconnect the wiring connections from the wire connectors noting their original locations and install the new motor similarly.
  5. Properly orient the new flicker motor onto the bracket and re-attach with the 2 mounting screws.
  6. Reassemble in the reverse order as above.
    CAUTION : When removing and replacing the flicker motor try to keep any slight bending of the flicker rod minimal so as to not damage it. If flicker rod is damaged, it should be replaced to ensure proper operation.
    CAUTION : When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to .reinstall the panels

Flicker Rod Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver Short handled Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.

  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 13)

  3. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.

  4. In the bottom right hand of the unit, remove the two screws and the front access cover. (Figure 11)

  5. In the media tray, remove the two screws on either end and the one on the side wall, to remove the clear media tray and the front panel. (Figure 12)DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(22\)
    NOTE : Tip the front panel forward then lift out of the unit.

  6. Remove the flicker rod by holding the gasket and sliding it to the left. This will disengage it from the motor. It will then be possible to remove it out of the opening.

  7. Reassemble in the reverse order as above.
    CAUTION : When removing and replacing the flicker motor try to keep any slight bending of the flicker rod minimal so as to not damage it. If flicker rod is damaged, it should be replaced to ensure proper operation.
    CAUTION : When re-installing, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall the panels

LED Light Strips Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin. Tools required: Phillips head screwdriver Wire Snips
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.
  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 13)DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(23\)
  3. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.
  4. In the bottom right hand of the unit, remove the two screws and the front access cover. (Figure 11)
  5. In the media tray, remove the two screws on either end and the one on the side wall, to remove the clear media tray and the front panel. (Figure 12)
  6. Remove the flicker rod. This can be done by sliding it to the left which will disengage it from the flicker motor.
  7. Locate the LED strip that needs to be replaced.
  8. Disconnect the wire from the board by pulling gently on the connector at the end.
  9. Remove the board from the mounting bracket by pressing in the center of the standoffs to release them.
  10. Line up the holes on the board and gently press the new board onto the mounts. Make sure the board is secure.
  11. Reconnect the wire.
  12. Reassemble in the reverse order as above.

CAUTION : When removing and replacing the flicker motor try to keep any slight bending of the flicker rod minimal so as to not damage it. If flicker rod is damaged, it should be replaced to ensure proper operation

High Temperature Cutout Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
Tools required: Phillips head screwdriver
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.
    NOTE : Try to ensure the pieces do not get pushed or wedged underneath the Partially Reflective Glass. They may obstruct the ease of removing the Partially Reflective Glass from the fireplace.

  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 14)DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(24\)

  3. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.

  4. Remove the remaining screw, that secures the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  5. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  6. Remove the heating cover by removing the 4 screws: 2 on the left and 2 on the right of the tray. (Figure 14)

  7. Locate the high temperature cutout and remove the mounting screw Remove the 2 screws, that secure the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  8. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  9. Disconnect the wiring connections noting their original locations.
    NOTE : Using a flat head screwdriver gently pry between the end of the connectors and the board to release the wires.

  10. Properly orient the new high temperature cutout and connect all of the wiring connections.

  11. Reassemble in the reverse order as above.

Element Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electricshock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
Tools required: Phillips head screwdriver. Needle nosed pliers.
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.
    NOTE : Try to ensure the pieces do not get pushed or wedged underneath the Partially Reflective Glass. They may obstruct the ease of removing the Partially Reflective Glass from the fireplace.

  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 14)

  3. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.

  4. Remove the remaining screw, that secures the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  5. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  6. Remove the heating cover by removing the 4 screws: 2 on the left and 2 on the right of the tray. (Figure 14)

  7. From the top panel of the heating assembly housing, remove the 4 screws that hold the element cover to the housing panel.

  8. Disconnect wires from the ends of the elements noting their original locations.
    NOTE : Using a flat head screwdriver gently pry between the end of the connectors and the element to release the wires.
    NOTE : Some of the wires may have a “piggy-back” connector that allows a second wire to connect to the same prong as the first wire. Try and keep the “piggyback” connection together when pulling the wires off the element.

  9. Reassemble in the reverse order as above.
    CAUTION : When re-installing covers and panels, be sure the wires are guided and tucked into the proper openings along the right side so they are not pinched and allows enough space to reinstall panel.

Blower Replacement

WARNING : Disconnect power before attempting any maintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
Tools required: Phillips head screwdriver. Needle nosed pliers.
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.
    NOTE : Try to ensure the pieces do not get pushed or wedged underneath the Partially Reflective Glass. They may obstruct the ease of removing the Partially Reflective Glass from the fireplace.

  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 14)

  3. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.

  4. Remove the remaining screw, that secures the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  5. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  6. Remove the heating cover by removing the 4 screws: 2 on the left and 2 on the right of the tray. (Figure 14)

  7. Remove the 2 screws, that secure the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  8. Slide the controls assembly out toward the front of the unit.
    CAUTION : Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  9. Remove the 2 screws, that secure the cover panel (Figure 14), located at the top of the mirror on the left side of the unit.

  10. Remove the three screws on either side of the heater/ blower assembly and gently lower the assembly so that the top can be viewed.
    CAUTION: When removing the blower assembly mounting screws, support the assembly to prevent any damage to the unit.

  11. Remove the 6 screws (3 sets) that secure the blower to the assembly (Figure 15).

  12. Disconnect the wiring connections noting their original locations.
    NOTE : Using a flat head screwdriver gently pry between the end of the connectors and the blower/fan to release the wires.

  13. Properly orient the new blower/fan assembly and connect all of the wiring connections.

  14. Reassemble in the reverse order as above.

Thermistor Replacement

WARNING : Disconnect power before attempting anymaintenance or cleaning to reduce the risk of electric shock or damage to persons.
CAUTION : If unit was operating prior to servicing allow at least 10 minutes for lights and heating elements to cool off to avoid accidental burning of skin.
Tools required: Phillips head screwdriver. Needle nosed pliers.
CAUTION : Follow “Preparation for Service” instructions before proceeding.

  1. Remove the decorative acrylic ember-bed pieces from the media tray, which lies along the bottom of the interior Partially Reflective Glass. A medium sized container such as a bucket or a box will be needed to keep the acrylic ember-bed pieces together.
    NOTE : Try to ensure the pieces do not get pushed or wedged underneath the Partially Reflective Glass. They may obstruct the ease of removing the Partially Reflective Glass from the fireplace.

  2. Remove the Partially Reflective Glass retaining brackets by removing the 3 screws on each brackets; (3 brackets in total), located on the left and right side of the Partially Reflective Glass. (Figure 14)

  3. Remove the Partially Reflective Glass. Carefully place the glass assembly aside in a safe location.

  4. Remove the remaining screw, that secures the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  5. Slide the controls assembly out toward the front of the unit.
    CAUTION: Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  6. Remove the heating cover by removing the 4 screws: 2 on the left and 2 on the right of the tray. (Figure 14)

  7. Remove the 2 screws, that secure the controls assembly (Figure 9), located at the top of the mirror on the right side of the unit.

  8. Slide the controls assembly out toward the front of the unit.
    CAUTION: Ensure that the assembly is removed carefully, ensuring that no wires are caught or over strained.

  9. Remove the 2 screws, that secure the cover panel (Figure 14), located at the top of the mirror on the left side of the unit.

  10. Remove the three screws on either side of the heater/ blower assembly and gently lower the assembly so that the top can be viewed.
    CAUTION : When removing the blower assembly mounting screws, support the assembly to prevent any damage to the unit.

  11. Locate the thermistor, carefully cut the tie wrap attaching the thermistor to the standoff.

  12. Disconnect the wiring connections on the display / control board.

  13. Install the new thermistor and secure it with a new tie wrap. Ensure that the excess wire is secured in such a way that it does not obstruct other components.

  14. Connect all of the wiring connections.

  15. Reassemble in the reverse order as above.DIMPLEX-BLF3451-34-Inch-Wall-Mounted-Electric-Fireplace-fig- \(25\)

Troubleshooting Guide

PROBLEM                               CAUSE SOLUTION                           PART NUMBER

General|
Circuit breaker trips or fuse blows when unit is turned on| Short in unit wiring.| Trace wiring in unit.|
Improper circuit current rating| Additional appliances may exceed the current rating of the circuit breaker or fuse. Plug unit into another outlet or install unit on a dedicated 15 amp circuit.|
Lights dim in room while the unit is on| Unit is drawing close to circuit current rating| Move the unit to another outlet or install unit on a dedicated 15 amp circuit|
Power cord gets warm| Normal Operation| The power cord may get slightly warm to the touch when the heater is on|
Defective power cord| Replace power cord if cord gets hot to the touch.| 4100190300RP
Appearance|
Fireplace does not turn on with the manual controls| Improper operation| Refer to Operation section|
No incoming voltage from the electrical wall socket| Check Fuse/Breaker Panel|
Loose wiring| Check wiring connections|
Defective main control board| Replace the main control board| 3001640100RP
Defective switchboard| Replace the switchboard assembly| 3001520100RP
Defective AC/DC adapter| Replace the AC/DC adapter| 2100250100RP
Fireplace does not turn on with the Remote Control| Improper operation| Refer to Operation section|
The batteries in the remote con- trol are dead.| Install new battery into the remote control.|
Defective remote control| Replace the remote control| 6700520200RP
Defective main control board| Replace the main control board| 3001640100RP
Flame Frozen| Improper installation| Ensure that the flicker motor wire is con- nected with the neutral power wires.|
Loose wiring| Check wiring connections|
Defective flicker motor| Replace flicker motor| 2000500100RP
Defective main control board| Replace the main control board| 3001640100RP
Flame is not visible| Improper operation| Refer to Operation section. Ensure flames are turned on.|
Loose wiring| Check wiring connections|
Flame LED light assembly is not working| Replace flame LED light assembly| 3001420200RP
Defective main control board| Replace the main control board| 3001640100RP
Flame Shudder| Defective flicker motor| Replace flicker motor| 2000500100RP
Media bed does not light up consistently| Build up of static electricity in unit| Unplug the unit for 1 minute then plug the unit back in.|
Media bed does not light up| Loose wiring| Check wiring connections|
Defective media LED light assembly| Replace media LED light assembly| 6 LED – 3001570100RP

4 LED – 3001570400RP

Defective main control board| Replace the main control board| 3001640100RP
Media bed lighting comes on by itself| Defective main control board| Replace the main control board| 3001640100RP
PROBLEM                               CAUSE SOLUTION                            PART NUMBER

Heater|
Heater is not turning on, but flame effect is still function- ing| Improper operation| Refer to Operation Section. Ensure that heat is not deactivated and that the set tem- perature is above the room temperature.|
Loose wiring| Trace wiring in unit|
Defective main control board| Replace the main control board| 3001640100RP
Defective blower| Replace blower| 5300170300RP
Defective cutout| Replace cutout| 2300201500RP
Heater is turning off after a couple of minutes of opera- tion| Improper operation| Refer to Operation section|
Build up of dirt/dust in blower or louvers| Ensure that exterior intake louvers and firebox cavity are free of dirt/dust.|
Defective blower| Replace blower| 5300170300RP
Heater emits an odor| Normal operation| Normal operation is when the heater emits an odor for a brief period after the heater is initially turned on. The heater is burning off any dust accumulated during manufacturing or inoperation.|
Defective heating element| Replace heating element| 2200510300RP
Heater fan turns on, but heater lacks heat| Improper operation| Refer to Operation section. Ensure that the set temperature is above the room tem- perature.|
Loose wiring| Trace wiring in unit|
Defective element| Replace heating element| 2200510300RP
Heating element is glowing

red

| Normal operation| Small glowing sections of the element are considered normal.|
Defective blower| If larger glowing sections are causing the heater to trip the thermal cutout, unplug unit, discontinue use and replace the blower.|


2200510300RP

Heater fan runs continu- ously| Normal operation| The fan runs for a cool-down period after the heater has been turned off or has reached the desired temperature|
Loose wiring| Trace wiring in unit|
Defective main control board| Defective main control board| 3001640100RP
Noise|
Excessive noise with the heater on| Dirty blower/louvers| Ensure that exterior intake louvers and firebox cavity are free of dirt/dust. Clean the blower using compressed air.|
Defective blower| Replace blower| 5300170300RP
Grinding or excessive noise with the heater off| Flicker rod hitting or rubbing against internal components| Ensure rod is straight and mounted properly in the bracket, spinning freely away from other components. Replace if necessary.|
Defective flicker motor| Replace flicker motor| 2000500100RP

REV PCN DATE

  • 00 – 6-JAN-16
  • 01 – 16-AUG-19

1-888-346-7539
www.dimplex.com
In keeping with our policy of continuous product improvement, we reserve the right to make changes without notice.
© 2019 Glen Dimplex Americas

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