What It Means
- ID ADD ON BOARD PROBLEM
Lennox Unit controller
Lennox Error Code 80
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 80
When the CORE Unit Controller is not able to communicate with any attached add-on boards (C3 and GP3) this alarm code is logged. The CORE Unit Controller will retry to establish the communication once every 5 second. Alarm is automatically cleared once communication is restored.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
ID ADD ON BOARD PROBLEM
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.
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