What It Means
- STRIKE 3 HEAT 1 S15 LIMIT OR ROLLOUT
Lennox Unit controller
Lennox Unit controller Error Code 55
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 55
Heat section 1 flame roll out burner 1 switch is open. Check gas roll out switch S47.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
STRIKE 3 HEAT 1 S15 LIMIT OR ROLLOUT
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.
