What It Means
- DSI BOARD 1 FLAME LOSS
Lennox Unit controller
Lennox Error Code 236
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 236
Direct Spark Ignition board 1 flame loss maximum reached. Board will be locked out for 1 hour. Check gas valve, ignition, and wiring. Lockout may be manually reset by removing power from the control for more than 1 second or removing the thermostat call for heat for more than 1 and less than 20 seconds.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
DSI BOARD 1 FLAME LOSS
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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