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LG Refrigerator 22 — Compressor relay / inverter control fault

LG Refrigerator · Error code 22

What 22 Means

Error 22 indicates a fault in the compressor control circuit — typically the compressor relay or inverter board can't drive the linear compressor, OR the compressor itself has failed to start.

Symptoms

  • 22 displayed on temperature panel
  • No cooling at all
  • No compressor hum at start
  • Frequent click/buzz from compressor area
  • Often paired with code 33

Common Causes

1
Failed linear compressor

Most common on 2014–2022 units — covered by the 10-year Rosen settlement warranty.

2
Failed inverter PCB

Compressor drive board (often labeled 'inverter' on the rear) won't fire.

3
Open thermistor at compressor

Compressor temp sensor open prevents drive.

4
Bad main control board relay

Main PCB relay won't energize the inverter.

How to Fix It

  1. Note: in service test mode, 22 means the test is currently on the compressor check — that's normal.
  2. If 22 appears during normal operation with no cooling, check warranty status (2014–2022 US LG models likely covered for parts + labor 10 yr).
  3. Pull the rear panel and locate the inverter board on the compressor.
  4. With the unit on, listen — three clicks then nothing typically means a seized compressor.
  5. Swap the inverter board first (cheaper, often the cause).
  6. If new inverter still throws 22 and compressor won't start, replace the compressor under warranty if eligible.

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.

Common replacement Compressor inverter board View on Amazon→ Common replacement Linear/inverter compressor View on Amazon→

More LG Refrigerator Codes

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 Fault Er CO Er CO — Compressor / Communication Fault Er dH Er dH — Defrost Heater Fault

All LG codes → All refrigerator codes →

Verified against manufacturer documentation: lg.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.