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

1. undefined: Check door gasket for damage; replace door gasket if damaged. 2. undefined: Measure Fuse-M resistance: should be 0 ohm (continuity). If open, replace Fuse-M. 3. undefined: Measure Defrost Heater resistance at heater terminals: normal range is 48~54 ohm. If open or shorted, replace heater. 4. undefined: Measure Defrost Sensor resistance: should be approximately 22k ohm at room temperature. If open or grossly out of range, replace sensor. 5. undefined: Enter Test Mode 2 (push test button 2 times) and measure voltage at CON9 pins 7~13: expected 112V~116V. If voltage is absent, replace Main PCB. 6. undefined: Enter Test Mode 1 (push test button 1 time) and measure voltage at CON9 pins 7~13: expected 0V. If not 0V, replace Main PCB. 7. undefined: If all parts test good and voltage is correct, explain to customer (possible intermittent door seal issue).

LG Refrigerators

Error Code F dH

Defrost Heater Abnormal — Defrost heater or thermal fuse short circuit or unplugged connector. Indicated 4 hours after trouble occurs.

Moderate

Address soon - your appliance may not work properly

Also displayed as: F dH

How to Fix

1
Check door gasket for damage; replace door gasket if damaged.
2
Measure Fuse-M resistance: should be 0 ohm (continuity). If open, replace Fuse-M.
3
Measure Defrost Heater resistance at heater terminals: normal range is 48~54 ohm. If open or shorted, replace heater.
4
Measure Defrost Sensor resistance: should be approximately 22k ohm at room temperature. If open or grossly out of range, replace sensor.
5
Enter Test Mode 2 (push test button 2 times) and measure voltage at CON9 pins 7~13: expected 112V~116V. If voltage is absent, replace Main PCB.
6
Enter Test Mode 1 (push test button 1 time) and measure voltage at CON9 pins 7~13: expected 0V. If not 0V, replace Main PCB.
7
If all parts test good and voltage is correct, explain to customer (possible intermittent door seal issue).

This Error Applies To

LG LRSOC2306 Series Refrigerators

Service manual exact match: LRSOC2306SService manual exact match: LRSOC2306VService manual exact match: LRSOC2306BService manual exact match: LRSOC2306W

Related Error Codes

E FS

Freezer Sensor Abnormal — Freezer sensor short or open failure

E UC

UV/Nano LED Module Error — Bad UV LED module or poor connection of display and UV module; caused when feedback signals are abnormal (OPTIONAL feature)

E rS

Refrigerator Sensor Abnormal — Refrigerator sensor (upper part of refrigerator compartment) short or open failure

F dS

Defrost Sensor Abnormal — Defrost sensor short or open failure

E FF

Freezer Fan Motor Abnormal — Connection line of the fan motor is faulty, short or open. Display fault when operating fan motor for 65 seconds without feedback.

E rt

Ambient (Room) Temperature Sensor Abnormal — Room temperature sensor short or open

E IK

Ice Maker Unit (Motor) Abnormal — Ice maker step motor fault, Hall IC fault, or Li-wire short; faulty motor driving circuit. Display shows error if ice maker error occurs within 30 minutes after power on.

E tt

Water Tank Switch Error — Water tank not assembled correctly or water tank switch error (optional feature)

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