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: should be 0 ohms (continuity). If open/infinite, replace defrost control assembly. 3. undefined: Check defrost sensor resistance: should be approximately 22 kΩ at room temperature, or matches temperature table. If open or shorted, replace defrost sensor. 4. undefined: Enter Test Mode 3 (press test button 3 times on Main PCB; display shows '33 33'). Check CON3 heater voltage at 9th pin to 4th pin. If voltage is 112-116V, proceed to check heater. 5. undefined: If Test Mode 3 voltage is NOT 112-116V at CON3, replace Main PCB. 6. undefined: Enter Test Mode 1 (press test button 1 time; display shows '11 11'). Check CON3 at 2nd pin to 9th pin. If voltage is NOT 0V, replace Main PCB. 7. undefined: If all PCB voltages are correct but heater still fails, check defrost heater resistance (should be 34-42 ohms). Replace heater if out of range.

LG Refrigerators2017–present

Error Code dH F

Q: What does error code dH F mean on a LG refrigerators?

Defrost Heater Error / Poor Defrosting Temperature fuse (Fuse-M) open; Defrost heater disconnected or failed; Drain jam; Poor relay for heater; Defrost sensor failure; During 2 consecutive cycles defrost sensor did not reach 46°F (8°C)

Defrost Heater Error / Poor Defrosting

Moderate

Address soon - your appliance may not work properly

Also displayed as: dH F

What This Means

Temperature fuse (Fuse-M) open; Defrost heater disconnected or failed; Drain jam; Poor relay for heater; Defrost sensor failure; During 2 consecutive cycles defrost sensor did not reach 46°F (8°C)

How to Fix

1
Check door gasket for damage. If gasket is damaged, replace door gasket.
2
Check Fuse-M resistance: should be 0 ohms (continuity). If open/infinite, replace defrost control assembly.
3
Check defrost sensor resistance: should be approximately 22 kΩ at room temperature, or matches temperature table. If open or shorted, replace defrost sensor.
4
Enter Test Mode 3 (press test button 3 times on Main PCB; display shows '33 33'). Check CON3 heater voltage at 9th pin to 4th pin. If voltage is 112-116V, proceed to check heater.
5
If Test Mode 3 voltage is NOT 112-116V at CON3, replace Main PCB.
6
Enter Test Mode 1 (press test button 1 time; display shows '11 11'). Check CON3 at 2nd pin to 9th pin. If voltage is NOT 0V, replace Main PCB.
7
If all PCB voltages are correct but heater still fails, check defrost heater resistance (should be 34-42 ohms). Replace heater if out of range.

This Error Applies To

LG LMXS28626S Series Refrigerators (2017) (2017–present)

Service manual exact match: LMXS28626SService manual exact match: LMXS28626DService manual exact match: LMXS28626WService manual exact match: LMXS28626BService manual exact match: LFXS28566SService manual exact match: LFXS28566DService manual exact match: LFXS28566WService manual exact match: LFXS28566B+2 more