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Error code reference
LG Air Conditioner Error Code CH72
Detect 4-way valve transfer failure.
SourceLG Wall Mounted Air Conditioner - Service Manual: General Inverter Typep. 28, 78
Diagnostic procedure
The full CH72 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 pipe sensor is disconnected (indoor/outdoor); check if pipe sensor is burned; check 4-way valve coil disconnection/burn; measure 4-way valve coil resistance.
SourceLG Wall Mounted Air Conditioner - Service Manual: General Inverter Typep. 28, 78
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.
Models covered by the manuals that document this code
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