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Error code reference
Lennox HVAC Error Code 3 Flashes
Pressure switch open or closed, or auxiliary limit open (code will not appear until after indoor blower has been de-energized for approximately 120 seconds).
SourceLennox HVAC - Service Manual: 10GCS/10CHA/10CHP Seriesp. 15
Where this code is documented
4 manuals in the MyPros+ library document this code for Lennox hvac.
Models covered by the manuals that document this code
- 10CHA
- 10CHA-048
- 10CHA-060
- 10CHP
- 10CHP-048
- 10CHP-060
- 10GCS
- 10GCS-048
- 10GCS-060
- 12CHP
- 12GCS024-50
- 12GCS024-75
- 12GCS030-50
- 12GCS030-75
- 12GCS036-100
- 12GCS036-50
- 12GCS036-75
- 12GCSX024-50
- 12GCSX024-75
- 12GCSX030-50
- 12GCSX030-75
- 12GCSX036-100
- 12GCSX036-50
- 12GCSX036-75
More models are covered than are listed here.
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