What It Means
- DSI BOARD 1 VALVE FAULT
Lennox Unit controller
Lennox Unit controller Error Code 240
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 240
Direct Spark Ignition board 1 loss of gas valve feedback detected. M4 will lockout gas valve 1 operation. Check gas valve and wiring.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
DSI BOARD 1 VALVE FAULT
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?
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