What It Means
- NOT ECONOMIZING WHEN OAS
Lennox Unit controller
Lennox Error Code 150
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 150
May be due to the damper motor being unplugged or disconnected.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
NOT ECONOMIZING WHEN OAS
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.
