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Heater Auto setting not working right

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by RooDog, Nov 1, 2021.

  1. RooDog

    RooDog New Member

    Joined:
    Nov 1, 2021
    1
    0
    0
    Location:
    Redmond, Wa
    Vehicle:
    2012 Prius
    Model:
    IV
    When Heater set to auto, and temperature set to 79 deg, fan is at slow speed. If you adjust the temp either up or down, the fan works it's way up to high. Outside temp is 50 deg.

    I just got this car back after having the head gasket replaced, due to overheating. Mechanic response was to tell me to not use auto setting.
     
    #1 RooDog, Nov 1, 2021
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    108,822
    49,434
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    what happens if you start at low and work your way up one degree at a time, pausing for 20 seconds each degree?
     
    #2 bisco, Nov 2, 2021
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