What It Means
- RETURN AIR UNDER COOL LIMIT
Lennox Unit controller
Lennox Unit controller Error Code 41
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 41
Cool is below set point as defined by parameter 114.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
RETURN AIR UNDER COOL LIMIT
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.
