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

1. undefined: Step 1: Confirm error code E CH via SVC App Step 1 or temperature gun. If temperatures are normal, it may be a customer perception issue. 2. undefined: Step 2: Check PCB voltage output to confirm PCB is not the fault. If PCB is bad, replace PCB. 3. undefined: Step 3: Use SVC App Step 2 to measure high/low side pressure and equalization recovery time. If recovery takes more than 15 minutes, restriction is suspected. 4. undefined: Step 4: If equilibrium pressure is above 20 psi, compressor is suspected bad — perform compressor check and replace if confirmed. 5. undefined: Step 5: If equilibrium pressure is below 20 psi, refrigerant leak is confirmed. Charge with nitrogen for leak test. 6. undefined: Step 6: Check high-pressure side parts (condenser, drier, compressor discharge pipe) with bubble solution or refrigerant leak detector. If leak found, replace the leaking part and drier. 7. undefined: Step 7: If no leak found on high-pressure side, inspect low-pressure side (evaporator, suction pipe). 8. undefined: Step 8: If no leak found on either side, install UV drier and revisit to locate leak under UV light. 9. undefined: Step 9: After sealed system repair, error clears automatically when freezer reaches 14°F.

LG Refrigerators

Error Code E CH

High side cycle leakage — detected by high side refrigerant leak, restriction, bad compressor, or bad valve

Moderate

Address soon - your appliance may not work properly

Also displayed as: E CH

How to Fix

1
Step 1: Confirm error code E CH via SVC App Step 1 or temperature gun. If temperatures are normal, it may be a customer perception issue.
2
Step 2: Check PCB voltage output to confirm PCB is not the fault. If PCB is bad, replace PCB.
3
Step 3: Use SVC App Step 2 to measure high/low side pressure and equalization recovery time. If recovery takes more than 15 minutes, restriction is suspected.
4
Step 4: If equilibrium pressure is above 20 psi, compressor is suspected bad — perform compressor check and replace if confirmed.
5
Step 5: If equilibrium pressure is below 20 psi, refrigerant leak is confirmed. Charge with nitrogen for leak test.
6
Step 6: Check high-pressure side parts (condenser, drier, compressor discharge pipe) with bubble solution or refrigerant leak detector. If leak found, replace the leaking part and drier.
7
Step 7: If no leak found on high-pressure side, inspect low-pressure side (evaporator, suction pipe).
8
Step 8: If no leak found on either side, install UV drier and revisit to locate leak under UV light.
9
Step 9: After sealed system repair, error clears automatically when freezer reaches 14°F.

This Error Applies To

LG LF31S6360 Series Refrigerators

Service manual exact match: LF31S6360SService manual exact match: LF31S6360BService manual exact match: LF31S6360WService manual exact match: LF31S6360D