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

1. undefined: Inspect door gasket for damage or gaps. If gasket is damaged or not sealing, replace the door gasket. 2. undefined: Enter Test Mode 1 (press test button 1 time). Measure resistance at CON9 pins 5–13. Expected: 42 to 50 Ω. If resistance is out of range, check and replace Fuse-M. 3. undefined: Measure defrost sensor resistance at CON8 pins 26–25. Expected at room temp: ~22 kΩ. If reading is 22 kΩ or open/infinite, replace the defrost sensor or product as appropriate. 4. undefined: Enter Test Mode 3 (press test button 3 times, forced defrost). Measure voltage at CON9 pins 5–13. Expected: 112–116 V. If voltage is not present, replace the Main PCB. 5. undefined: Enter Test Mode 1. Measure voltage at CON9 pins 5–13. Expected: 0 V (heater off). If voltage is not 0 V, replace the Main PCB. 6. undefined: If all measurements are correct and defrost completes normally, explain normal defrost cycle operation to customer.

LG Refrigerators

Error Code F dH

Defrost Heater Error

Moderate

Address soon - your appliance may not work properly

How to Fix

1
Inspect door gasket for damage or gaps. If gasket is damaged or not sealing, replace the door gasket.
2
Enter Test Mode 1 (press test button 1 time). Measure resistance at CON9 pins 5–13. Expected: 42 to 50 Ω. If resistance is out of range, check and replace Fuse-M.
3
Measure defrost sensor resistance at CON8 pins 26–25. Expected at room temp: ~22 kΩ. If reading is 22 kΩ or open/infinite, replace the defrost sensor or product as appropriate.
4
Enter Test Mode 3 (press test button 3 times, forced defrost). Measure voltage at CON9 pins 5–13. Expected: 112–116 V. If voltage is not present, replace the Main PCB.
5
Enter Test Mode 1. Measure voltage at CON9 pins 5–13. Expected: 0 V (heater off). If voltage is not 0 V, replace the Main PCB.
6
If all measurements are correct and defrost completes normally, explain normal defrost cycle operation to customer.