What It Means
- SBUS OBSOLETE M2 COMMAND
Lennox Unit controller
Lennox Error Code 176
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 176
This alarm occurs when a S-BUS primary device sends a M2 style command to the CORE Unit Controller. The alarm is immediately cleared and a history of the event is stored.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
SBUS OBSOLETE M2 COMMAND
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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