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

1. undefined: Use LG SVC App Step 1 to determine if problem is compressor, sealed system, or customer emotional fault. Without SVC App, use temperature gun. 2. undefined: Check PCB output voltages to rule out PCB fault. 3. undefined: Measure high-pressure side (drier) and low-pressure side (compressor process pipe) pressures. Check return time to equalization: if more than 15 minutes, sealed system is blocked. 4. undefined: Check equalization pressure to confirm refrigerant charge level. 5. undefined: Use SVC App Step 2 or charge nitrogen/R134a to locate leak. 6. undefined: Inspect high-pressure side parts: condenser, drier, condenser outlet, drier inlet, drier outlet. 7. undefined: If no high-pressure leak found, check low-pressure side: evaporator inlet/outlet, suction pipe. 8. undefined: Repair leak, replace drier, and recharge with R600a (60g). 9. undefined: After repair, error clears automatically when freezer reaches 14°F or below. 10. undefined: Force-clear error if needed: with door open, press F key + R key 3 times. 11. undefined: Check for UV dye at next visit to confirm no re-leak.

LG Refrigerators

Error Code E CH

High-Side Cycle Refrigerant Leak / Sealed System Problem

Moderate

Address soon - your appliance may not work properly

Also displayed as: E CH

How to Fix

1
Use LG SVC App Step 1 to determine if problem is compressor, sealed system, or customer emotional fault. Without SVC App, use temperature gun.
2
Check PCB output voltages to rule out PCB fault.
3
Measure high-pressure side (drier) and low-pressure side (compressor process pipe) pressures. Check return time to equalization: if more than 15 minutes, sealed system is blocked.
4
Check equalization pressure to confirm refrigerant charge level.
5
Use SVC App Step 2 or charge nitrogen/R134a to locate leak.
6
Inspect high-pressure side parts: condenser, drier, condenser outlet, drier inlet, drier outlet.
7
If no high-pressure leak found, check low-pressure side: evaporator inlet/outlet, suction pipe.
8
Repair leak, replace drier, and recharge with R600a (60g).
9
After repair, error clears automatically when freezer reaches 14°F or below.
10
Force-clear error if needed: with door open, press F key + R key 3 times.
11
Check for UV dye at next visit to confirm no re-leak.