When the fan runs and the air stays warm, the cause is usually maintenance: a filter, a coil, a mode setting or a tripped plug. Refrigerant is the last item on the list and the one thing an owner cannot touch.

LG room air conditioners speak a fourth code language, CH followed by a number. The number tells you which family the fault belongs to, and that decides whether the next step is a filter, a breaker or a certified technician.

A portable air conditioner is also a dehumidifier, and the water has to go somewhere. FL is the unit saying its tank is full. On a damp day that can be perfectly normal; on a dry one it can be a stuck float.

LG lists the LW1424RD as a window air conditioner. On this platform, the CH21 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status flag, read 24 September 2026. Service calls on this air conditioner most often trace […]

As a window air conditioner, the LW1812ERS shares its core mechanism with the rest of LG’s air conditioner lineup. On this platform, the CH21 fault code is one of the more common reasons it gets a service call. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out […]

The LW1821ERSM is an LG window air conditioner. Current model — LG’s own US product page still carries this model with an active status flag, read 24 September 2026. On this platform, the CH10 fault code is one of the more common reasons it gets a service call. Service calls on this air conditioner most […]

LG lists the LW2413HR as a window air conditioner. On this platform, the CH10 fault code is one of the more common reasons it gets a service call. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production but not out of the field, and it […]

As a window air conditioner, the LW2423HR shares its core mechanism with the rest of LG’s air conditioner lineup. On this platform, the CH53 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status flag, read 24 September […]

LG lists the LW5014 as a window air conditioner. On this platform, the CH21 fault code is one of the more common reasons it gets a service call. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production but not out of the field, and it […]

LG lists the LW6017R as a window air conditioner. On this platform, the CH29 fault code is one of the more common reasons it gets a service call. LG’s own US product page still carries this model with an active status flag, read 24 September 2026. Service calls on this air conditioner most often trace […]