Indoor air temperature sensor fault
What it means
On LG air conditioners, CH01 usually points to a problem with the indoor return-air temperature sensor, such as an open or short circuit. The meaning can vary by model, so check the manual for your unit.
Symptoms3
- Cooling is uneven and does not match the set temperature.
- The unit stops and shows the code.
- The compressor may run for unusual lengths of time.
Possible causes4
- Failed temperature sensor.
- Sensor plug not properly seated.
- Wire damaged by heat or rodents.
- Indoor control board fault.
How to diagnose and fix3
- Cut power for two minutes, then restart.
- Have a technician test the sensor reading.
- Replace the sensor if its reading is out of range.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
The sensor is cheap and the job is simple, unless the board is at fault.
Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Frequently asked questions
Will the code return after a restart?
If the sensor has failed it usually will, and it needs replacing.
Does it affect power use?
Yes, it can make the unit run more than necessary until repaired.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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