ERROR CODE EXPLAINED
LG Air Conditioner
LG Air Conditioner CH54 Error Code
What it means
The air conditioner detected a reverse-phase or electrical phase condition.
Try this first
- Turn the air conditioner off.
- Reset the air conditioner circuit breaker once.
- If the code appeared after electrical work, contact the electrical contractor.
- Do not attempt internal electrical repairs.
Can I keep using it?🔴 Electrical condition
Repair usually required?🔴 Professional inspection recommended
If the error keeps returning
If CH54 returns after the recommended troubleshooting, LG recommends inspection or service.
Official source
Troubleshooting information verified against manufacturer support documentation.
View manufacturer support page →Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.