Skip to main content
Error code reference
LG Air Conditioner Error Code 153
System off due to excessive increase of discharge temperature of constant speed compressor 2 of sub3 outdoor unit.
SourceLG Air Conditioner - Service Manual: LRNU/LRUN/LRUV Seriesp. 174, 214
Diagnostic procedure
The full 153 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
Refer to CH33 procedure.
SourceLG Air Conditioner - Service Manual: LRNU/LRUN/LRUV Seriesp. 174, 214
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock 153 procedure $9.95
Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.
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
75,000+ service documents · 20,000+ error codes · 100+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax