LG · Refrigerator Critical

Er CH — (E CH) — High-side refrigerant leak / cooling fault

Inspection code logged after the board sees prolonged poor cooling on the high-pressure side of the sealed system. Usually indicates a leak at the condenser or discharge line, or a valve/compressor failure on the high side.

Keep using it?
No — service first
DIY difficulty
Hard
Verified against
lg.com ↗

How to fix it

  1. Verify the door seals and ventilation behind the unit are not the cause first.
  2. Note: this is a sealed-system code; per LG it requires a sealed-system tech (EPA 608).
  3. If under the 10-year linear compressor warranty (2014–2022 US models per Rosen settlement), file a warranty claim before any out-of-pocket repair.
  4. A tech will leak-check, recover refrigerant, replace the failed component, evacuate and recharge.
  5. After successful repair, code self-clears after 24 hours below 14°F (or force-clear: hold Freezer + Refrigerator together 3× with door open).

Why it happens

Typical signs: Er CH or E CH on display · Both compartments slowly warming · Compressor runs nonstop with little cooling · Lower-than-normal compressor amperage · Condenser only warm in part

  • Refrigerant leak on condenser/high side Most common — pinhole leak in condenser tubing.
  • Faulty 3-way valve (multi-evap models) Valve fails to route refrigerant correctly.
  • Weak compressor discharge Worn linear compressor not building head pressure.
  • Restriction in dryer/cap tube Partial blockage starves the evaporator.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Linear/inverter compressor Common replacement
    Amazon →
  • Filter dryer Common replacement
    Amazon →

More LG refrigerator codes

22 22 — Compressor relay / inverter control fault 33 33 — Compressor / defrost test fault 67 67 — Door open / not fully closed 88 88 — Power-on display test (not a fault) Er CF Er CF — Condenser fan motor feedback fault Er CO Er CO — Communication error (main board ↔ display)

All LG codes → All refrigerator codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.