LG RangeOven Error Codes and Troubleshooting Steps

June 17, 2024
LG

No. Error Symptom Cause
1 Opened Sensor F1 Oven sensor (thermistor) remains open for oven 1 min

during cooking.
2| Shorted Sensor| F2| Oven sensor (thermistor) is short for over 1 min during cooking.
3| Key shorted Error| F3| When some keys are continuously short for over 60 seconds.
4| Oven hot| F6| The oven temp is over 650°F continuously during 2 minutes on cooking except self cleaning.
5| No heating| F9| If starting oven temp does not exceed 150°F and oven temp is less than or equal to starting temp over 5 minutes during preheating, while door is closed.
6| Probe Sesnor short| F8| Right oven probe sensor short error check
7| Door lock fail| F10| In case of door lock failure during operating lock motor
8| Comm. Error| F11| The communication error happened between cooktop PCB and oven PCB over 10 seconds in the self clean mode.
9| LF Top Sensor Open/ Short| CF1| LF Top sensor is open or short
10| LR Top Sensor Open / Short| CF2| LR Top sensor is open or short
11| RF Top Sensor Open/ Short| CF3| RF Top sensor is open or short
12| RR Top Sensor Open/ Short| CF4| RR Top sensor is open or short
13| Left IGBT Sensor Open/ Short| CF5| Left IGBT sensor is open or short
14| Right IGBT Sensor Open/ Short| CF6| Right IGBT sensor is open or short
15| Left Comm. Error| CF7| Right IGBT sensor is open or short
16| Right Comm. Error| CF8| Communication error at right module
17| Over Current| CFA| Communication error at right module
18| Over Voltage| CFC| Over voltage occurs at the cooktop
19| Box fan error| CFF| Box fan not working properly
20| Convection fan error| F7| Convection fan operating can’t be detected over 1 minute in all cases of Upper convection fan operating.
21| Stalled Fan lock error| F27| When cooling fan is stalled during self clean
22| Sensor open| F1F4| Oven thermistor is open
23| Sensor short| F2F5| Oven thermistor is shorted
24| Oven hot| F6F16| The oven temp is over 650°F continuously during 2 minutes on cooking except self cleaning.
25| Probe short| F18| Loer oven probe is shorted.
26| Oven no heating| F9F19| EXCEPT PROOF and WARM Starting temp of 130° for less, and the oven door is closed, the ove inside temp does not go up more than 10°F compared with the starting temp for 5 minutes after the start of cooking
27| Door lock fail| F10F20| If the door lock fails while operating the lock motor
28| Oven sensor open| F4| Oven thermistor remains open for over 60 seconds, after cook starts during cooking
29| Oven sensor short| F5| Oven thermistor is short for over 60 seconds after cook starts during cooking
30| Oven is hot| F16| Oven temp is over 650°F continuously during 2 minutes on cooking except self cleaning.
31| Oven no heating| F19| EXCEPT PROOF, WARM, SpeedClean, SteamClean, Drying, Descaling and SousVide Case 1: Start temperature does not exceed 130 ℉ and oven temperature is less equal than 150 ℉ and max oven temperature is less equal than start oven temperature + 10 ℉ over 5 minutes on preheating, where door is closed. Case 2: Oven temperature is less equal than 100 ℉ over 5 minutes on preheating, where door is closed.
32| Door lock fail| F20| If door lock failure while operating the lock motor.
33| Steam sensor open| F24| Steam thermistor remains open for 10 second after the steam heater operated from 5 minutes.
34| Steam sensor short| F25| Steam thermistor is short for over 60 seconds after the steam heater operated.

Oven Sensor and Thermistor Related Errors (F1, F2, F22, F23, F28, F29,

F33, F34)

  • Troubleshooting Steps:
    • Check Sensor Connection: Ensure the oven sensor is securely connected to the control board.
    • Test Sensor: Use a multimeter to measure the resistance of the sensor. It should read approximately 1080-1090 ohms at room temperature. Replace the sensor if it deviates significantly from this range.
    • Inspect Wiring: Look for any damaged or shorted wires between the sensor and the control board and repair or replace as needed.

Key and Communication Errors (F3, F11, CF7, CF8)

  • Troubleshooting Steps:
    • Clean Control Panel: Clean the control panel and keypad to remove any debris or spills that might cause shorts.
    • Check Wiring Connections: Ensure all ribbon cables and wires between the control board and keypad are secure and undamaged.
    • Reset the Range: Unplug the range for a few minutes to reset the control board. Plug it back in to see if the error persists.
    • Replace Control Board or Keypad: If the error continues, the keypad or control board might need replacement.

Overheating Errors (F6, F24, F30)

  • Troubleshooting Steps:
    • Verify Oven Use: Ensure the range is not in a self-clean mode or settings that naturally increase the oven’s temperature.
    • Check Ventilation: Ensure the oven is properly ventilated and the fan is operating as expected.
    • Inspect Door Seal: Check the door seal for any damage that might be causing heat to escape.

Heating and Fan Errors (F9, F20, F26, F31, CFF, F7, F27)

  • Troubleshooting Steps:
    • Check Heating Elements: Inspect the bake and broil elements for visible damage. Use a multimeter to check for continuity. Replace any faulty elements.
    • Verify Fan Operation: Ensure the convection and cooling fans are operational and not obstructed.
    • Inspect Door Lock Mechanism: For door lock errors, ensure the lock mechanism is clean and moves freely. Check the wiring and replace the lock assembly if it’s malfunctioning.

Cooktop Sensor and IGBT Errors (CF1 to CF6, CFA, CFC)

  • Troubleshooting Steps:
    • Sensor Inspection: Check the cooktop sensors for damage or disconnection. Replace sensors showing open or short circuits.
    • IGBT Module Check: Inspect the IGBT modules for signs of overheating or damage. These components should be checked by a professional due to the complexity of the system.
    • Reset Error Codes: After addressing the issue, reset the error codes by unplugging the range for a few minutes.

Over Current and Voltage Errors (CFA, CFC)

  • Troubleshooting Steps:
    • Electrical Supply Check: Verify that the electrical supply to the range matches the specifications. An over voltage protector might be needed if surges are common in your area.
    • Inspect Power Cord and Outlet: Ensure the power cord and outlet are in good condition and the cord is properly connected to the range.

Probe Sensor Errors (F8, F25)

  • Troubleshooting Steps:
    • Check Probe Connection: Ensure the probe is fully inserted and the connection is clean.
    • Test Probe: Use a multimeter to test the probe’s resistance. Replace the probe if its resistance is outside the normal range.
    • Inspect Wiring: Look for damaged wires between the probe and the control board.

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