LG error code CH01
What it means
Indoor air (room) temperature sensor fault.
Possible causes
Room thermistor open circuit Shorted sensor element Poor connector contact at indoor PCB
Suggested fix
Verify sensor connector seating and measure thermistor resistance against LG's temperature-resistance curve; replace the sensor if readings are outside specification.
Safety first. Isolate the power supply before inspecting any unit. Refrigerant-circuit
and electrical repairs must be carried out by a qualified, registered technician.
Other LG codes
- CH02 — Indoor pipe (coil) temperature sensor fault.
- CH03 — Drain pump or condensate removal error.
- CH05 — Communication fault between the indoor and outdoor unit.
- CH09 — Indoor unit EEPROM or memory error.
- CH10 — Indoor fan motor fault or abnormal fan operation.
- CH21 — Outdoor DC compressor IPM (inverter power module) fault.
- CH22 — Outdoor current transformer (CT) error.
- CH23 — Outdoor DC compressor overcurrent protection.
- CH61 — High temperature protection in outdoor unit (cooling) or indoor unit (heating).
- CH67 — Outdoor fan motor fault.