What It Means
- Blower On - (71%) OAS
Lennox Unit controller
Lennox Error Code b71S
Unit controller
Causes & actions from Lennox
How it shows
- m4 local 7segment: b71S
Blower On - (71%) OAS Input
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
Blower On - (71%) 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.
