Error Code E CH

High-side refrigerant cycle leakage — detected by high-side pressure anomaly (refrigerant leak, restriction, bad compressor, bad valve)

Also displayed as: E CH

How to Fix

1. 1

   Use LG SVC App Step 1 to confirm error code E CH and measure evaporator temperature trend. If temperatures are normal, inspect PCB — bad PCB may generate false error; replace PCB if confirmed.

2. 2

   Use SVC App Step 2 to monitor high/low side pressure and equalization recovery time. If recovery takes more than 15 minutes after compressor shutoff, sealed system is restricted — proceed to restriction check.

3. 3

   Check equilibrium pressure (SVC App Step 3/4). If equilibrium pressure is greater than 20 psi, refrigerant is adequately charged and compressor is suspect — replace compressor.

4. 4

   If equilibrium pressure is 20 psi or less, refrigerant has leaked. Begin leak detection on the HIGH-PRESSURE side first: check compressor discharge pipe, drier, condenser, and hot line inlet using a bubble solution or electronic refrigerant leak detector.

5. 5

   If a leak is found on the high-pressure side: replace the leaking part plus the drier. Evacuate and recharge with R-600a (78 g).

6. 6

   If no leak found on high-pressure side, inspect the LOW-PRESSURE side (evaporator, suction pipe, evaporator joints).

7. 7

   If low-pressure side leak is found: replace the leaking part, the drier, AND the compressor (moisture entry degrades compressor oil).

8. 8

   If no leak is detected but refrigerant is low, install a UV drier to trace the leak on the next service visit using UV light and goggles.

9. 9

   After sealed system repair, error code clears automatically when freezer temperature reaches 14°F or below.

This Error Applies To

LG LRFGC2706S Series Refrigerators