What It Means
- INCORRECT HUMIDITROL
Lennox Unit controller
Lennox Unit controller Error Code 85
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 85
Check Humiditrol+ settings. Check Configuration ID 1, position 1 and verify that the position is not set to U. Should be set to either N (not installed) or H (Humiditrol). Alarm will automatically clear once correct option is set.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
INCORRECT HUMIDITROL
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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