What It Means
- GAS VALVE ON NO DEMAND GV2
Lennox Unit controller
Lennox Unit controller Error Code 45
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 45
No 24VAC relay power on A60 (E1) board, K9-5 input. (A60)
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
GAS VALVE ON NO DEMAND GV2
MODEL L - M4 UNIT CONTROLLER, M4 Unit Controller
Disclaimer: This information is for general reference. Code wording and instructions vary by model. Always follow the service manual for your exact unit.
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