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

1. undefined: Check door gasket for damage — if damaged, replace door gasket. 2. undefined: Enter Test Mode 1 (push test button 1 time on Main PCB). Check CON9 5th-to-13th-pin voltage: should be 0 V. If not 0 V, replace Main PCB. 3. undefined: Enter Test Mode 3 (push test button 3 times). Check CON9 5th-to-13th-pin voltage: should be 112–116 V. If not in range, replace Main PCB. 4. undefined: Check Fuse-M resistance (pins 1-to-2): should be 0–0.1 Ω. If open (OL), replace Fuse-M. 5. undefined: Check defrost heater resistance: should be 62–70 Ω (42–50 Ω is acceptable range per flowchart). If open or shorted, replace defrost heater assembly. 6. undefined: Check defrost sensor resistance at CON8 26th-to-25th-pin against table. If OL or 22 kΩ at room temperature (normal), sensor is OK. 7. undefined: If heater and fuse check OK but error persists and voltage is correct, explain to customer (door seal issue or environmental factor).

LG Refrigerators

Error Code F dH

Defrosting failure — defrost heater error

Moderate

Address soon - your appliance may not work properly

How to Fix

1
Check door gasket for damage — if damaged, replace door gasket.
2
Enter Test Mode 1 (push test button 1 time on Main PCB). Check CON9 5th-to-13th-pin voltage: should be 0 V. If not 0 V, replace Main PCB.
3
Enter Test Mode 3 (push test button 3 times). Check CON9 5th-to-13th-pin voltage: should be 112–116 V. If not in range, replace Main PCB.
4
Check Fuse-M resistance (pins 1-to-2): should be 0–0.1 Ω. If open (OL), replace Fuse-M.
5
Check defrost heater resistance: should be 62–70 Ω (42–50 Ω is acceptable range per flowchart). If open or shorted, replace defrost heater assembly.
6
Check defrost sensor resistance at CON8 26th-to-25th-pin against table. If OL or 22 kΩ at room temperature (normal), sensor is OK.
7
If heater and fuse check OK but error persists and voltage is correct, explain to customer (door seal issue or environmental factor).

This Error Applies To

LG LRYKC2606 Series Refrigerators

Service manual exact match: LRYKC2606VService manual exact match: LRYKC2606DService manual exact match: LRYKC2606SService manual exact match: LRYKC2606B