What It Means
- POWER EXHAUST CONFIGURATION ERROR
Lennox Unit controller
Lennox Error Code 171
Unit controller
Causes & actions from Lennox
How it shows
- M4 alarm code: 171
Configuration ID 1, position 4 is set correctly. if position 3 is configured then position 4 must be also.
Applicable models & manual sources
- MODEL L - M4 UNIT CONTROLLER
POWER EXHAUST CONFIGURATION ERROR
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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