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

1. undefined: Check door gasket for damage. If gasket is damaged, replace the door gasket. 2. undefined: Measure heater resistance at CON9 pins 5~13 (Test Mode 1). Expected 42~500 ohm for a good heater. 3. undefined: If heater resistance is out of range (42~500 ohm), the Fuse-M is open. Replace Fuse-M. 4. undefined: Check defrost sensor resistance at CON9 pins (linked pins). Expected ~22k ohm or match temperature table. If open or 0 ohm, replace the defrost sensor. 5. undefined: Enter Test Mode 3 (press test button 3 times on Main PCB). Measure voltage at CON9 pins 5~13. Expected 112~116V. 6. undefined: If voltage is not 112~116V in Test Mode 3, check input voltage first. If input voltage is OK, replace the Main PCB. 7. undefined: Enter Test Mode 1. Measure voltage at CON9 pins 5~13. Expected 0V (heater off). 8. undefined: If voltage is not 0V in Test Mode 1, replace the Main PCB. 9. undefined: If all checks pass, replace the refrigerator.

LG Refrigerators2020–present

Error Code F dH

Freezer Defrost Heater Error — defrost heater or Fuse-M failure; defrosting sensor did not reach 41F (5C) within 80 minutes

Moderate

Address soon - your appliance may not work properly

Also displayed as: F dH

How to Fix

1
Check door gasket for damage. If gasket is damaged, replace the door gasket.
2
Measure heater resistance at CON9 pins 5~13 (Test Mode 1). Expected 42~500 ohm for a good heater.
3
If heater resistance is out of range (42~500 ohm), the Fuse-M is open. Replace Fuse-M.
4
Check defrost sensor resistance at CON9 pins (linked pins). Expected ~22k ohm or match temperature table. If open or 0 ohm, replace the defrost sensor.
5
Enter Test Mode 3 (press test button 3 times on Main PCB). Measure voltage at CON9 pins 5~13. Expected 112~116V.
6
If voltage is not 112~116V in Test Mode 3, check input voltage first. If input voltage is OK, replace the Main PCB.
7
Enter Test Mode 1. Measure voltage at CON9 pins 5~13. Expected 0V (heater off).
8
If voltage is not 0V in Test Mode 1, replace the Main PCB.
9
If all checks pass, replace the refrigerator.

This Error Applies To

LG LRMVS3006D Series Refrigerators (2020) (2020–present)

Service manual exact match: LRMVC2306SService manual exact match: LRMVC2306DService manual exact match: LRMDS3006DService manual exact match: LRMDS3006SService manual exact match: LRMVS3006DService manual exact match: LRMVS3006SService manual exact match: LRMDC2306SService manual exact match: LRMDC2306D

Related Error Codes

E FS

Freezer Sensor Error — short or open circuit in the freezer thermistor

E rS

Refrigerator Sensor Error — short or open circuit in the fresh food compartment thermistor

F dS

Freezer Defrost Sensor Error — short or open circuit in the freezer defrost sensor

r dS

Refrigerator Defrost Sensor Error — short or open circuit in the refrigerator defrost sensor

E HS

Humidity Sensor Error — short or open circuit in the humidity sensor

E CS

Convertible (Pantry/Full Convert) Sensor Error — short or open circuit in the pantry drawer sensor

E rt

Room Temperature Sensor Error — short or open circuit in the ambient room temperature sensor

E IS

Icing Sensor Error — short or open circuit in the icing compartment (in-door icemaker) sensor

Need more help with your LG refrigerators?