LT1237HNR is LG’s model number for this through-the-wall air conditioner. LG’s own US product page still carries this model with an active status flag, read 24 September 2026. On this platform, the CH53 fault code is one of the more common reasons it gets a service call.
Service calls on this air conditioner most often trace to one of a short list: the CH53, CH05 or CH10 fault codes. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Programmable on/off timer
- Electronic thermostat control with a digital display
- Through-the-wall air conditioner
Most Common Issues on This Model
01
CH53 fault code — listed CH-prefixed fault on LG room air conditioners
02
CH05 fault code — listed CH-prefixed fault on LG room air conditioners
03
CH10 fault code — listed CH-prefixed fault on LG room air conditioners