Blower fan runs slower than expected in cold weather
Diagnostic procedure
  1. ECT troubleshooting: ECT sensor 2 circuit low voltage, R20A3 engine model, K24Z3 engine model, high voltage, R20A3 engine model, K24Z3 engine model
  2. NOTE: It is normal for the blower 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, R20A3 engine model, K24Z3 engine model
  • Faulty blower motor operation