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

1. undefined: Check door gasket for damage — if gasket is damaged, replace door gasket. 2. undefined: Check Fuse-M resistance (CON7 pins 6–12): expected 0Ω (continuity). If open/∞, replace defrost heater assembly. 3. undefined: Check defrost heater resistance (CON7 pins 6–12): expected 34–42Ω. If open, replace heater. 4. undefined: Check defrost sensor resistance at CON5 pins 10–9: expected ~22kΩ at room temperature. If OL/∞, replace defrost sensor. 5. undefined: Enter Test Mode 3 (push test button 3 times, display shows '33 33'): measure voltage at CON7 pins 6–12 — expected 112–116V. If voltage is present and heater does not heat, replace defrost heater. 6. undefined: Enter Test Mode 1: measure CON7 pins 6–12 — expected 0V at rest. If not 0V, replace Main PCB. 7. undefined: If all components test good and error persists: explain to customer.

LG Refrigerators

Error Code dH F

Poor Defrosting / Defrost Heater Error

Moderate

Address soon - your appliance may not work properly

Also displayed as: dH F

How to Fix

1
Check door gasket for damage — if gasket is damaged, replace door gasket.
2
Check Fuse-M resistance (CON7 pins 6–12): expected 0Ω (continuity). If open/∞, replace defrost heater assembly.
3
Check defrost heater resistance (CON7 pins 6–12): expected 34–42Ω. If open, replace heater.
4
Check defrost sensor resistance at CON5 pins 10–9: expected ~22kΩ at room temperature. If OL/∞, replace defrost sensor.
5
Enter Test Mode 3 (push test button 3 times, display shows '33 33'): measure voltage at CON7 pins 6–12 — expected 112–116V. If voltage is present and heater does not heat, replace defrost heater.
6
Enter Test Mode 1: measure CON7 pins 6–12 — expected 0V at rest. If not 0V, replace Main PCB.
7
If all components test good and error persists: explain to customer.