Error code reference

LG Air Conditioner Error Code 01

Indoor room thermistor error (open/short circuit, poor solder, or internal circuit error).

SourceLG Ceiling Cassette Air Conditioner - Service Manual (LCN/LCU 240/340CP)p. 38-39

Diagnostic procedure

The full 01 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Unplug sensor from indoor PCB and measure resistance; normal is 10KΩ at 25°C (77°F). If 0KΩ or ∞, replace the sensor.

SourceLG Ceiling Cassette Air Conditioner - Service Manual (LCN/LCU 240/340CP)p. 38-39

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

86 manuals in the MyPros+ library document this code for LG air conditioner.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full 01 procedure

Where this code is documented

Models covered by the manuals that document this code

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