Lennox HVAC Error Code 5 Flashes

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.

• 101The air-handler has lost communication with the rest of the…
• 102There is a frequency/distortion problem with the power to…
• 103The 24VAC to the air-handler control is lower than the…
• 104There is a delay in the air-handler responding to the…
• 105The iComfort thermostat has lost communication with the…
• 106There is a hardware problem with the air-handler control.
• 130An air-handler configuration jumper is missing.
• 131The air-handler control parameters are corrupted.