Model reference
Lennox XP19-024
Heat Pump
1 document9 error codes2 service modes
Available documentation
Service Manual
- XP19 Series Service Literature27 pg
MyPros+ Max
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- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
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Service modes (2)
- Compressor Two-Stage Modulation Operational Check["Turn main power OFF to outdoor unit.","Adjust room thermostat set point above (heating) or below…
- Defrost Board Test Mode["Ensure Y1 is energized and 24V power is applied to the defrost board.","Ensure the 'O' room…
Full entry steps, exit procedures, and test sequences are available in Max.
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