Lennox HVAC Error Code DIAG1+DIAG2 Flash Together

Where this code is documented

1 manual in the MyPros+ library documents this code for Lennox hvac.

Models covered by the manuals that document this code

• AM30
• HM30
• HM30-1
• HM30-100
• HM30-100P
• HM30-150
• HM30-150P
• HM30-2P
• HM30-3
• HM30-4
• HM30-5

• 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.