Error code reference

LG HVAC Error Code 45

PCB sees ODU condenser coil middle or exit pipe (liquid line) thermistor as open or shorted.

SourceLG Ductless HVAC & PTAC - Tech Sheet: Error Codes & Wiring

Diagnostic procedure

The full 45 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

Must be 2,800Ω at 38°C/100°F & 10,000Ω at 10°C/50°F. Ohm thermistor in water; with perfect thermistor & plug connection, change PCB.

SourceLG Ductless HVAC & PTAC - Tech Sheet: Error Codes & Wiring

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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 hvac.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full 45 procedure

Where this code is documented

Models covered by the manuals that document this code

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