How do I fix error code F dH on a LG refrigerators?

1. undefined: Check door gasket for damage or gaps that allow warm air infiltration; if damaged, replace the door gasket. 2. undefined: With power OFF, measure defrost heater resistance at test points (1) to (2); expected 42 to 50 Ohm. If open/infinite, replace defrost heater. 3. undefined: With power OFF, measure Fuse-M resistance at test points (1) to (2); expected 0 to 0.1 Ohm. If open/infinite, replace Fuse-M (thermal cutout). 4. undefined: Measure defrost sensor resistance at CON8 26th Pin to 25th Pin. If open, the sensor is defective; replace defrost sensor. 5. undefined: Enter Test Mode 1 (press TEST button once): Measure voltage at CON9 5th Pin to 13th Pin; expected 0V in Test Mode 1. 6. undefined: If Test Mode 1 voltage is not 0V, replace the Main PCB. 7. undefined: Enter Test Mode 3 (press TEST button 3 times for forced defrost): Measure voltage at CON9 5th Pin to 13th Pin; expected 112 to 116V. 8. undefined: If Test Mode 3 voltage is correct but heater does not heat, replace the defrost heater assembly. 9. undefined: If Test Mode 3 voltage is not present, replace the Main PCB. 10. undefined: Check drain tube for ice or debris blockage; clear if blocked.

LG Refrigerators

Error Code F dH

Defrosting failure

Moderate

Address soon - your appliance may not work properly

Also displayed as: F dH

How to Fix

1
Check door gasket for damage or gaps that allow warm air infiltration; if damaged, replace the door gasket.
2
With power OFF, measure defrost heater resistance at test points (1) to (2); expected 42 to 50 Ohm. If open/infinite, replace defrost heater.
3
With power OFF, measure Fuse-M resistance at test points (1) to (2); expected 0 to 0.1 Ohm. If open/infinite, replace Fuse-M (thermal cutout).
4
Measure defrost sensor resistance at CON8 26th Pin to 25th Pin. If open, the sensor is defective; replace defrost sensor.
5
Enter Test Mode 1 (press TEST button once): Measure voltage at CON9 5th Pin to 13th Pin; expected 0V in Test Mode 1.
6
If Test Mode 1 voltage is not 0V, replace the Main PCB.
7
Enter Test Mode 3 (press TEST button 3 times for forced defrost): Measure voltage at CON9 5th Pin to 13th Pin; expected 112 to 116V.
8
If Test Mode 3 voltage is correct but heater does not heat, replace the defrost heater assembly.
9
If Test Mode 3 voltage is not present, replace the Main PCB.
10
Check drain tube for ice or debris blockage; clear if blocked.

This Error Applies To

LG LF29S8330 Series Refrigerators

Service manual exact match: LF29S8330SService manual exact match: LF29S8330BService manual exact match: LF29S8330WService manual exact match: LF29S8330D