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Error code reference
LG Air Conditioner Error Code 154
Excessive rise of high pressure in sub3 outdoor unit - compressor off due to high pressure switch.
SourceLG Air Conditioner - Service Manual: R410A Exploded View (ARUB Series)p. 271
Diagnostic procedure
The full 154 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
1
First diagnostic step
Check if high pressure switch connector is connected to PCB.
SourceLG Air Conditioner - Service Manual: R410A Exploded View (ARUB Series)p. 271
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
10 manuals in the MyPros+ library document this code for LG air conditioner.
Models covered by the manuals that document this code
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