LG · Ductless air conditioner

CH53

Power reset only

error code

LG CH53 indicates a communication error between the indoor and outdoor units of a covered inverter air conditioner.

Market, product family, and model applicability

US · en-US · LG inverter split-system air conditioners covered by the cited US guide

product family applicable: The official source applies at the product-family level. Exact controls can still vary by model.

Check the official model/manual lookup

What you can do now

Use the documented five-minute power reset and request service if the display persists or returns.

Disconnect power for five minutes, restore power, and observe whether the display returns.

Stop and get service when

Request LG service if the display persists or returns after the supported reset.

Request LG service if the display persists or returns after the supported reset.

Do not do

Do not open electrical panels, access wiring, handle refrigerant, alter piping, or work on internal fans or compressors.

Use only exterior observations and the documented power reset; leave internal electrical, fan, piping, and refrigerant work to qualified professionals.

If the message returns

If the display persists or returns after the reset, request LG service.

Source and scope

Official manufacturer source

Market and locale: US · en-US
Product family: inverter split-system air conditioners
Official source last checked: July 26, 2026
Review status: Automated evidence review completed · Owner-delegated approval

[LG Air Conditioner] Guide to Error Codes · Official error-code index

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