FRIGIDAIRE FDD50J4 Built In Dehumidifier User Guide

July 11, 2024

FRIGIDAIRE FDD50J4 Built In Dehumidifier


  • Brand: Frigidaire
  • Model: FDD50J4
  • Part Number: 327000009 (0011)
  • Warranty: 1-year full warranty, additional warranty for sealed system

Product Usage Instructions

  • Important Safety Instructions:
    • Read and save the instructions provided in this manual. Record the model and serial numbers of the dehumidifier. Keep a copy of the bill of sale for warranty purposes.
  • Location:
    • Place the dehumidifier in a suitable location with proper ventilation and access to a power source.
  • How It Works:
    • Understand the operation of the dehumidifier to effectively manage humidity levels in your space.
  • Operating Steps:
    • Follow the step-by-step instructions in the manual for the proper operation of the dehumidifier.
  • Dehumidifier Features:
    • Familiarize yourself with the features of the dehumidifier for optimal performance.
  • Removing Collected Water:
    • Learn how to safely remove and dispose of the water collected by the dehumidifier.
  • Care and Cleaning:
    • Maintain the dehumidifier by following the care and cleaning instructions provided in the manual.
  • Avoid Service Checklist:
    • Refer to the checklist to troubleshoot common issues before seeking professional service.


  • Q: How often should I clean the filter?
    • A: The filter should be cleaned every two weeks for optimal performance.
  • Q: Can I use this dehumidifier in a basement?
    • A: Yes, this dehumidifier is suitable for use in basements, but ensures proper ventilation.


Record Model No. and Serial No. of this dehumidifier in the space provided below. These numbers are printed on the nameplate located behind the bucket.

  • Model No.
  • Serial No.

IMPORTANT: Keep a copy of your bill of sale. The date on the bill establishes the warranty period should service be required. If service is performed, it is in your best interest to obtain and keep all receipts.

Register Your Product

The self-addressed PRODUCT REGISTRATION CARD should be filled in completely, signed, and returned to the Frigidaire Company. Operate the dehumidifier only as instructed in this Owner’s Guide. These instructions are not meant to cover every possible condition and situation that may occur. Common sense and caution must be used when installing, operating, and maintaining any appliance.


Your product is protected by this warranty.

Your appliance is warranted by Frigidaire Company, a division of White Consolidated Industries, Inc. We authorize no person to change or add to any of our obligations under this warranty. Our obligations for service and parts under this warranty must be performed by Frigidaire Company Consumer Services or an authorized Frigidaire Company servicer.


This warranty applies only to products in ordinary household use, and the consumer is responsible for the items listed below.

  1. Proper use of the appliance per instructions provided with the product.
  2. Proper installation by an authorized servicer under instructions provided with the appliance and per all local plumbing, electrical, and/or gas codes.
  3. Proper connection to a grounded power supply of sufficient voltage, replacement of blown fuses, repair of loose connections or defects in house wiring.
  4. Expenses for making the appliance accessible for servicing, such as removal of trim, cupboards, shelves, etc., which were not a part of the appliance when it was shipped from the factory.
  5. Damages to finish after installation.
  6. Replacement of light bulbs and/or fluorescent tubes (on models with these features).


This warranty does not cover the following:

    • Note: Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation or exclusion may not apply to you.
  2. Service calls that do not involve malfunction or defects in workmanship or material, or for appliances not in ordinary household use. The consumer shall pay for such service calls.
  3. Damages caused by services performed by persons other than authorized Frigidaire Company servicers; use of parts other than Frigidaire Company Genuine Renewal Parts; obtained from persons other than such servicers; or external causes such as abuse, misuse, inadequate power supply or acts of God.
  4. Products with original serial numbers that have been removed or altered cannot be readily determined.


Keep your bill of sale, delivery slip, or some other appropriate payment record. The date on the bill establishes the warranty period should service be required. If service is performed, it is in your best interest to obtain and keep all receipts. This written warranty gives you specific legal rights. You may also have other rights that vary from state to state. Service under this warranty must be obtained by following these steps, in order:

  1. Contact Frigidaire Company Consumer Services or an authorized Frigidaire servicer.
  2. If there is a question as to where to obtain service, contact the Frigidaire Consumer Relations Department at:

Important Safety Instructions

WARNING: Avoid fire hazards or electric shock. Do not use an extension cord or an adaptor plug. Do not remove the grounding prong from the power cord.

  • Read all instructions before using this dehumidifier. To reduce the risk of fire, electric shock, or injury to persons when using your dehumidifier, follow basic precautions, including the following:

WARNING For Your Safety

  • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. Read product labels for flammability and other warnings.

WARNING Child Safety Precautions

  • Destroy the carton, plastic bags, and any packing materials immediately after the dehumidifier is unpacked. Children should never use these items for play.
  • Do not leave children unattended in an area where the appliance is operating.
  • Do not allow them to sit or stand on the appliance.

WARNING Electrical Information

  • For your safety and protection, this dehumidifier is equipped with a three-prong grounding plug on the power cord. Do not, under any circumstances, cut or remove the round ground prong from the plug.
  • Your dehumidifier must be plugged directly into a properly grounded and polarized three-prong receptacle. If the wall receptacle you intend to use will not accept a three-prong plug, or if you are not sure the outlet is adequately grounded or protected by a time delay fuse or circuit breaker, have a qualified electrician install the proper outlet according to the National Electrical Code and applicable local codes and ordinances. Do not use an extension cord or an adapter plug.
  • Never unplug the dehumidifier by pulling on the power cord. Always grip the plug firmly and pull straight out from the receptacle.
  • Do not pinch, bend, or knot the power cord.

Location Selecting a Location IMPORTANT:

  1. The dehumidifier must be operated in an enclosed area to be most effective. Close all doors, windows, and other outside openings in the room. The effectiveness of the dehumidifier depends on the rate at which new moisture-laden air enters the room.
  2. Place the dehumidifier in a location that does not restrict airflow through the front of the unit or out of the louvers on the left side of the cabinet.
  3. A dehumidifier operating in a basement will have little or no effect in drying an adjacent enclosed storage area, such as a closet unless there is adequate circulation of air in and out of the area. It may be necessary to install a second dehumidifier in the enclosed area for satisfactory drying.

How It Works

  • When the unit is started, the fan begins to pull moisture-laden air across the dehumidifying coils.
  • The coils condense or draw moisture from the air, and air flows through the side louvers into the room as dry, warm air.
  • Moisture removed from air is collected in a bucket in front of the dehumidifier.

Operating Steps

The bucket has a hose/drain connection. The dehumidifier should be kept in operation as long as excess moisture is present in the room air.
To begin operating the dehumidifier, follow these steps:

  1. Plug the power cord into a properly grounded 110/120 volt AC outlet.
    • Note: Before operating this unit, see the “Removing Collected Water” section for proper placement of the bucket. The model will not operate if the bucket is not properly positioned in the unit.
  2. When first using the dehumidifier, turn the Humidistat Control clockwise to the MAX.DRY position. The unit will run continuously in this setting.
  3. Press the Fan Speed Button to HI. The HI setting is recommended for faster moisture removal.
  4. Allow the dehumidifier to operate at the above settings for three to four days. After this time, adjust the controls as needed. See below.

Dehumidifier Features

  • Humidistat Control
    • The Humidistat Control automatically starts the dehumidifier when humidity is excessive. When humidity has been reduced to the comfort level set on the control, the unit turns off.
    • When first using the dehumidifier, turn the Humidistat Control clockwise to MAX.DRY. The unit will run continuously at this setting. Operate dehumidifier at the MAX.DRY setting for three to four days. During this time, observe the dampness conditions in the area being dried.
    • When the sweating has stopped and the dampness odors are gone, adjust the Humidistat Control to the position between OFF and MAX.DRY that provides a “dryness” condition suitable to your needs/comfort.
  • Fan Speeds
    • The Fan Speed adjusts the fan speed. When humidity has been reduced to the desired level and quiet operation is preferred, press the Fan Speed to LO.
  • Moisture Removal
    • At first, the dehumidifier will remove large amounts of moisture. It will continue to do so until the relative humidity is reduced to a point where moisture damage will not occur. Then, the amount of moisture removed from the air will be a lot less. This indicates the dehumidifier is operating effectively and is maintaining the relative humidity at the desired level. Judge the performance of the dehumidifier by the elimination of dampness and dampness odors, not by the amount of water being deposited in the bucket. When the bucket has filled with water, the unit will turn off. All models feature an Automatic Shut-Off light that will glow until the bucket is emptied and returned to the proper position.
  • Operating Conditions
    • All models will operate if the room temperature is greater than 65°F (18°C). Models with a moisture removal capacity greater than 40 pints per 24 hours will operate satisfactorily at a temperature no lower than 50°F (10°C). If conditions less than those stated or the humidity is low the dehumidifier should be turned off. See “Frost Control”.
  • A dehumidifier will not eliminate frost on windows during winter. The dehumidifying coil normally operates above freezing temperatures and cannot prevent moisture from condensing on the inside of a window pane that is below freezing.
  • TIP: It may be helpful to use a dehumidifier in the kitchen or laundry area where the humidity is high. Reducing humidity in these areas may reduce frost on windows in other parts of the home.

Frost Control

  • The Frost Control feature prevents frost or ice from remaining on the dehumidifying coil for an extended period. When frost formation occurs, this control turns off the compressor. The fan continues to run, causing any frost or ice to melt.
  • The dehumidifier will then resume normal operation.
  • Frost Control is also designed to prevent excessive on-off cycling. Under certain conditions, this may allow frost to remain on the coil for some time before the compressor turns off and the frost is cleared.

Removing Collected Water

Bucket and Float Installation

  • All models are supplied with a bucket, which is conveniently tucked into the front of the unit to accumulate water removed from the air or use the built-in hose connection to carry water directly to a drain.
  • When using the bucket the Automatic Shut-Off switch is activated by a float. The
  • The Automatic Shut-Off switch stops the unit before the bucket overflows and turns the unit on again after the bucket is emptied and replaced.
  • The bucket and float must be installed correctly for proper operation (Figure 1).

Bucket Removal

  1. Grasp the bucket from both sides at the bottom, gently lift it up and slide halfway out until the handle is exposed. See Figure 2.
  2. Grab the handle and slide the bucket away from the unit. See Figure 3.
  3. After emptying the collected water, slide the bucket back into place.
  4. Be sure the bucket is in place.

Direct Draining

  • If you want the water to flow directly to a drain, you must first remove the hose cap (Figure 2).
  • To remove the hose cap, use a standard screwdriver and turn counter-clockwise. Connect any standard garden hose to the bucket connection, or place the dehumidifier over the drain.
  • A standard garden hose has a 3/4″ (19 mm) diameter connection with 11’¼z inch threads per inch.
  • Note: When using either of the above direct draining methods, you must first drill a 3/8″ (10 mm) hole in the center of the bucket connection. (For ease of drilling use the locating mark to center the drill bit for the hole (Figure 3).) This will allow water to flow freely through the connection. To reseal the hose connection to the bucket, use any standard hose end cap. The hose cap cannot be used to reseal the hole.

Care and Cleaning

Proper Care: Before cleaning, be sure to turn off and unplug the unit.

  1. Dust the outer cabinet with an oil-free cloth, or wash with warm water.
  2. Use a vacuum cleaner and brush attachment to clean the grill.
    • Note: The fan motor has been permanently lubricated at the factory. Air passing through a dehumidifier may carry quantities of dust, lint, and fungus spores. Much of this matter will be deposited on the coil and then flushed away by natural drainage.

Avoid Service Checklist

Before calling for service, review this list. It may save you time and expense. This list includes common occurrences that are not the result of defective workmanship or materials in this appliance.

When the actual seal is affixed to a dehumidifier and the water removal capacity rating for that dehumidifier appears in the AHAM Certification Directory, it signifies that the rating is certified by Frigidaire Company and verified by the Association of Home Appliance Manufacturers as complying with American National Standard B149.1.


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