Error Code dH E
Defrost Heater Error (Poor Defrost)
Moderate
Address soon - your appliance may not work properly
Also displayed as: dH E
What This Means
Blown Fuse-M, drain clogged, heater open, relay failure
How to Fix
- 1
Check the door gasket for proper seal — poor seal increases frost load.
- 2
Check for loose connection in defrost control part connector.
- 3
Measure resistance of defrost control assembly: Fuse-M pins (1)-(2) should read 0 to 0.1 ohm; if open/infinite, replace Fuse-M.
- 4
Measure defrost heater resistance between (1) and (2): should read 34 to 42 ohm; if out of range, replace heater.
- 5
Measure defrost sensor resistance: should read approximately 11kΩ at room temperature (20°C); if out of range, replace sensor.
- 6
Enter Test Mode 3 by pressing test button on Main PCB 3 times (33 33 displayed on screen) to force defrost.
- 7
Check for loose connection in CON3.
- 8
Measure voltage between Blue and Red wires at CON3 during Test Mode 3: should be 112 to 116V AC.
- 9
If 0V with heater connected: Replace Main PCB.
- 10
If voltage is present but sensor never reaches 8°C, check for blocked drain, heavy frost load, or heater not making thermal contact.
- 11
Release test mode by pressing test button once more; compressor will restart after 7-minute delay.
This Error Applies To
LG LFCS22520B Series Refrigerators