How do I fix error code E CH on a LG refrigerators?

1. undefined: Use SVC App Step 1 to determine if this is a compressor or sealed system problem, or a normal (customer emotional) fault. If no SVC App, use a temperature gun to check evaporator temperature. 2. undefined: Check PCB output voltage to rule out PCB failure. If PCB is bad, replace PCB. 3. undefined: Measure time for pressure equalization between high side (drier) and low side (compressor process pipe) after power off. If equalization takes more than 15 minutes, system is restricted. 4. undefined: If equalization pressure is above 40 psi, refrigerant is present — suspect bad compressor. Replace compressor. 5. undefined: If equalization pressure is 40 psi or less, refrigerant has leaked. Proceed to leak testing. 6. undefined: Check high pressure side parts (condenser, drier, compressor discharge pipe) for leaks using bubble solution or refrigerant leak detector. 7. undefined: If no high side leak found, check low pressure side parts (evaporator, suction pipe). 8. undefined: Repair any leak found, replace all leaking parts plus the drier. 9. undefined: After repair, wait until freezer reaches 14F or below — error code will clear automatically. 10. undefined: If temperature is normal and E CH persists, use forced deletion: press F key + R key 3 times with door open. 11. undefined: Use UV drier on next visit to verify no further leaks via UV light and UV goggles.

LG Refrigerators

Error Code E CH

High Side Cycle Leakage — Sealed System Problem

Moderate

Address soon - your appliance may not work properly

Also displayed as: CH E

How to Fix

1
Use SVC App Step 1 to determine if this is a compressor or sealed system problem, or a normal (customer emotional) fault. If no SVC App, use a temperature gun to check evaporator temperature.
2
Check PCB output voltage to rule out PCB failure. If PCB is bad, replace PCB.
3
Measure time for pressure equalization between high side (drier) and low side (compressor process pipe) after power off. If equalization takes more than 15 minutes, system is restricted.
4
If equalization pressure is above 40 psi, refrigerant is present — suspect bad compressor. Replace compressor.
5
If equalization pressure is 40 psi or less, refrigerant has leaked. Proceed to leak testing.
6
Check high pressure side parts (condenser, drier, compressor discharge pipe) for leaks using bubble solution or refrigerant leak detector.
7
If no high side leak found, check low pressure side parts (evaporator, suction pipe).
8
Repair any leak found, replace all leaking parts plus the drier.
9
After repair, wait until freezer reaches 14F or below — error code will clear automatically.
10
If temperature is normal and E CH persists, use forced deletion: press F key + R key 3 times with door open.
11
Use UV drier on next visit to verify no further leaks via UV light and UV goggles.

This Error Applies To

LG LRMDS3006D Series Refrigerators

Service manual exact match: LRMDS3006DService manual exact match: LRMDS3006SService manual exact match: LRMVS3006DService manual exact match: LRMVS3006S