Blower fan runs slower than expected in cold weather (when in AUTO mode) NOTE: It is normal for the blower fan to run slowly until the coolant temperature rises when in AUTO mode (2017 2018 2019)
Diagnostic Procedure
Probable cause: Engine coolant temperature (ECT) circuit malfunction
Troubleshoot the ECT sensor circuit:
Also Check for
- Climate control DTCs
- PGM-FI DTCs
- Blower motor operation