How do I fix error code E CH on my LG LRMVS3006D?

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 LRMVS3006DRefrigerator

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.