What It Means
- GAS VALVE ON NO DEMAND GV1
Lennox Unit controller
Lennox Unit controller Error Code 44
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 44
Unit is off. Gas valve 2 has power, but no demand. Check gas valve and wiring.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
GAS VALVE ON NO DEMAND GV1
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.
What should you check next?
Continue in ACLogics with guided diagnosis for your equipment and symptoms.
