mypros+
Error code reference

LG Refrigerator Error Code L/Piston

Compressor piston lock detected - insufficient oil in cylinder, cylinder/piston damage, clogged discharge, or alien particle inside compressor.

SourceLG Refrigerator - Full Service Manual: GR-M24 Seriesp. 33-38

LG codesLG refrigerator codes
Diagnostic procedure

The full L/Piston 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
After power reset, check normal operation; if same error occurs, replace compressor PCB; if persists, replace single compressor unit.

SourceLG Refrigerator - Full Service Manual: GR-M24 Seriesp. 33-38

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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 refrigerator.

Models covered by the manuals that document this code

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