Error code reference

LG Air Conditioner Error Code 180

Plate type heat exchanger freeze prevention error - lack of circulation water, low inlet water temperature, or defective water temperature sensor.

SourceLG Air Conditioner Outside Unit - Service Manual: ARNU/URNU Seriesp. 129

LG codes LG air conditioner codes

Diagnostic procedure

The full 180 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

Check if temperature sensor connector connections are normal.

SourceLG Air Conditioner Outside Unit - Service Manual: ARNU/URNU Seriesp. 129

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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

1 manual in the MyPros+ library documents this code for LG air conditioner.

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The full 180 procedure

Where this code is documented

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