Error code “Er 22” and the refrigerator may not cool; compressor may not start.

Safety: Unplug the refrigerator. High voltage is present at the compressor and inverter; only attempt basic checks if you are experienced.

• Listen for compressor: When powered, if you hear repeated clicking or no compressor hum at all, Er 22 may indicate a start/inverter issue.
• Visual inspection: Remove the rear lower panel and inspect the inverter module or compressor relay area on the PCB for burn marks or a burnt smell.
• Check wiring: Ensure all connectors to the compressor and inverter are fully seated and not damaged.
• Advanced testing: Measuring compressor winding resistance and inverter outputs should be done by a qualified technician due to shock risk.
• Service recommendation: For Er 22, LG typically recommends professional service to evaluate the compressor and inverter/PCB and to handle any sealed system work.