LG Portable AC Compressor Not Running — Fix

What Does This Error Mean?

LG portable AC compressor not running means the unit blows air but cannot cool. Common causes are an active error code (P1/P2), an incorrect mode selection, or a failed compressor start capacitor. Check for error codes and mode setting first.

How to Fix It

Check for active error codes
Confirm the mode is set to Cool
Set the target temperature below the current room temperature
Wait 3 minutes after restarting
Perform a full power reset
Contact LG service if compressor still does not start

Frequently Asked Questions

LG portable AC makes a click sound and then nothing — compressor fault?

A single click followed by no compressor hum usually means the start capacitor has failed. The compressor tries to start, fails, and the thermal overload cuts it off. The capacitor can be replaced by a qualified technician.

LG portable AC compressor hums loudly but does not cool — why?

A loud hum without cooling usually means the compressor is trying to start but cannot (seized). Allow the unit to rest for 10 minutes, then try again. If it hums but does not cool, the compressor has failed.

Is a portable AC compressor worth repairing?

Compressor replacement on portable ACs is expensive and often exceeds the cost of a replacement unit. If under warranty, claim a replacement. Out of warranty, a replacement unit is usually more cost-effective.