Error code reference
Lennox Air Conditioner Error Code 6
Compressor temperature exceeded its limit after running less than five minutes (or open sensor).
Compressor temperature exceeded its limit after running less than five minutes (or open sensor).
First step from the service manual
Check compressor winding temperature sensors; check superheat.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
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