Blower Fan(s) Runs Slower Than Expected In Cold Weather

Blower fan(s) runs slower than expected in cold weather

Diagnostic Procedure:

1. ECT troubleshooting: ECT sensor 2 circuit low voltage, P2184 ECT sensor 2 circuit high voltage P2185

2. NOTE: It is normal for the blower(s) to run slowly until the engine coolant temperature begins to rise. If the blower continues to run slowly for an abnormal length of time, continue to troubleshoot the problem.

Also check for:

- Powertrain DTCs Initial Inspection and Diagnostic Overview
- Blower motor operation