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Error code reference
Carrier Air Conditioner Error Code 8
Welded Contactor: Compressor always runs because contactor has failed closed.
SourceCarrier 569J Air Conditioner - Service Manual: Installation & Start-UpTable 12, page 40
Diagnostic procedure
The full 8 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 compressor contactor has failed closed; verify thermostat demand signal is connected to module.
SourceCarrier 569J Air Conditioner - Service Manual: Installation & Start-UpTable 12, page 40
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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