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

1. undefined: Use LG SVC App jig if available to determine if issue is compressor or sealed system; if no jig, use temperature gun to check condenser temperature 2. undefined: Check voltage to determine if it is a PCB problem 3. undefined: Measure high-pressure side (drier) and low-pressure side (compressor processing pipe) pressure 4. undefined: Check equalization return time after stopping compressor: if clogging is present, equalization takes more than 15 minutes 5. undefined: Check equalized pressure to determine if sufficient refrigerant is present 6. undefined: If refrigerant is low, perform leak test using refrigerant or nitrogen gas 7. undefined: Check high-pressure parts for leaks: condenser, drier, associated tubing 8. undefined: If no high-pressure leaks, check low-pressure parts: evaporator, suction pipe 9. undefined: After sealed system repair, error code clears automatically when freezer temperature drops to 14F or below 10. undefined: On follow-up visit, check for leaks using UV dye in drier

LG Refrigerators2023–present

Error Code E CH

High Side Cycle Leakage (Refrigerant Leak or Sealed System Problem)

Moderate

Address soon - your appliance may not work properly

What This Means

High-side refrigerant leak (condenser, drier, high-pressure tubing); Partial or complete restriction in high-side sealed system; Compressor not pumping adequately; Bad expansion valve

How to Fix

1
Use LG SVC App jig if available to determine if issue is compressor or sealed system; if no jig, use temperature gun to check condenser temperature
2
Check voltage to determine if it is a PCB problem
3
Measure high-pressure side (drier) and low-pressure side (compressor processing pipe) pressure
4
Check equalization return time after stopping compressor: if clogging is present, equalization takes more than 15 minutes
5
Check equalized pressure to determine if sufficient refrigerant is present
6
If refrigerant is low, perform leak test using refrigerant or nitrogen gas
7
Check high-pressure parts for leaks: condenser, drier, associated tubing
8
If no high-pressure leaks, check low-pressure parts: evaporator, suction pipe
9
After sealed system repair, error code clears automatically when freezer temperature drops to 14F or below
10
On follow-up visit, check for leaks using UV dye in drier