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

1. undefined: 1. Inspect the door gasket for damage. If gasket is damaged or allows warm air infiltration, replace the door gasket. 2. undefined: 2. Measure the defrost heater resistance at CON9 Pin 5 to Pin 13. Expected: 42 to 50 ohms. If outside this range, check Fuse-M continuity (should be 0 to 0.1 ohm). Replace Fuse-M or defrost heater as applicable. 3. undefined: 3. Enter Test Mode 3 (push test button 3 times, display shows '33 33') to force defrost. Measure voltage at CON9 Pin 5 to Pin 13. Expected: 112 to 116 V AC. If voltage is not present, replace Main PCB. 4. undefined: 4. Verify defrost sensor resistance at CON8 Pin 26 to Pin 25 is approximately 22 kΩ at room temperature; if reading is 0 or open/infinite, replace defrost sensor. 5. undefined: 5. Enter Test Mode 1 (push test button 1 time). Measure voltage at CON9 Pin 5 to Pin 13. Should read 0 V when heater is off. If voltage reads non-zero in normal mode, replace Main PCB. 6. undefined: 6. Check for drain tube blockage; clear any ice or debris from the drain tube. 7. undefined: 7. If all above check out, replace Main PCB.

LG Refrigerators

Error Code F dH

Defrost Heater Error / Defrosting Failure

Moderate

Address soon - your appliance may not work properly

How to Fix

1
1. Inspect the door gasket for damage. If gasket is damaged or allows warm air infiltration, replace the door gasket.
2
2. Measure the defrost heater resistance at CON9 Pin 5 to Pin 13. Expected: 42 to 50 ohms. If outside this range, check Fuse-M continuity (should be 0 to 0.1 ohm). Replace Fuse-M or defrost heater as applicable.
3
3. Enter Test Mode 3 (push test button 3 times, display shows '33 33') to force defrost. Measure voltage at CON9 Pin 5 to Pin 13. Expected: 112 to 116 V AC. If voltage is not present, replace Main PCB.
4
4. Verify defrost sensor resistance at CON8 Pin 26 to Pin 25 is approximately 22 kΩ at room temperature; if reading is 0 or open/infinite, replace defrost sensor.
5
5. Enter Test Mode 1 (push test button 1 time). Measure voltage at CON9 Pin 5 to Pin 13. Should read 0 V when heater is off. If voltage reads non-zero in normal mode, replace Main PCB.
6
6. Check for drain tube blockage; clear any ice or debris from the drain tube.
7
7. If all above check out, replace Main PCB.

This Error Applies To

LG LCFC26XSS Series Refrigerators

Service manual exact match: LCFC26XSSService manual exact match: LCFC26XSWService manual exact match: LCFC26XSBService manual exact match: LF31T6230SSService manual exact match: LF31T6230SWService manual exact match: LF31T6230SB