Heater blasts hot air on "HI", but the heat stops with one click to a lower temperature. Blower work

Discussion in 'Gen 3 Prius Main Forum' started by XFi fan, Mar 2, 2023.

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  1. Likeawind

    Likeawind Member

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    I have the same problem with my 08.

    Were you able to resolve this?
     
    #21 Likeawind, Apr 1, 2023
  2. Likeawind

    Likeawind Member

    Joined:
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    I have the same problem with my 08.

    Were you able to resolve this?
     
    #21 Likeawind, Apr 1, 2023
  3. Likeawind

    Likeawind Member

    Joined:
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    I have the same problem with my 08.

    Were you able to resolve
     
    #22 Likeawind, Apr 1, 2023
  4. ChapmanF

    ChapmanF Senior Member

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    The resolution in this particular thread can be seen in post #20, where it turned out to involve rodent teeth, and an insurance claim.

    That won't turn out to be the exact cause or the exact resolution in every case, of course. But if you are looking for what the behavior indicates and how to go about troubleshooting it, you can start with post #6 in this thread.
     
    #23 ChapmanF, Apr 1, 2023
  5. Likeawind

    Likeawind Member

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    I’m not clear what’s the cure for it.
     
    #24 Likeawind, Apr 1, 2023
  6. ChapmanF

    ChapmanF Senior Member

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    The cure for any issue, in general, is to first find out what's causing the issue in your car, and then fix that.

    Doing what cured it for somebody else only works if what's causing it is the same as what caused it for them, and you don't know that before doing the troubleshooting.
     
    #25 ChapmanF, Apr 1, 2023
  7. XFi fan

    XFi fan Junior Member

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    ChapmanF, on Friday I finally got my car back. It only took 7 weeks I think... Rodent damage did indeed cause the problem with the heater as well as the auto light function. The hvac box assembly with servo motors was replaced. As well as a sub harness and ac amp and heater core hose. Rather remarkable what damage a rodent can cause. And one final thank you to ChapmanF for all the wisdom you provided. You thought there was (likely) a wiring issue and you were right. Thanks!
     
    #26 XFi fan, Apr 30, 2023
  8. ChapmanF

    ChapmanF Senior Member

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    (y)
     
    #27 ChapmanF, Apr 30, 2023
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