Start Car with Rear Defrost On

Discussion in 'Gen 3 Prius Main Forum' started by WastedTheLight, Nov 2, 2016.

  1. WastedTheLight

    WastedTheLight Junior Member

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    If I turn on the heat and defroster then turn my car off, when I turn it back on only the heat is on. Is there anyway around this so when I use my car starter it will defrost without me going out?

    Posted via the PriusChat mobile app.
     
  2. StarCaller

    StarCaller Senior Member

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    nope, the rear defrost gets reset to "off" once the ignition is turned off /

    BION
    StarCaller
     
  3. WastedTheLight

    WastedTheLight Junior Member

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    Not even carista can override this? If not llaaammmeee. It really wasn't made for us winter state people in mind, haha

    Posted via the PriusChat mobile app.
     
  4. BZzap!

    BZzap! Senior Member

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    It's configured to shut off when the car is powered down. There is a reason for that. The battery would drain in a matter of a few minutes due to the ICE not running and charging the battery. The electric window defogger draws a lot of amperage.
     
  5. David Beale

    David Beale Senior Member

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    Actually, no. No battery drain will occur when the car is turned off. Oh, and the rear window defogger draws a lot of -current-. There is no such thing as "amperage". ;)

    The rear defroster on the Prius, like on just about any car, is run through a "latching relay" system. You can turn it on when the car is on, but it will turn off automatically after some period of time, and when the car is turned off. This is done for a very good reason. If you left it on, as people are wont to do, it could cause problems in the long term. The reason is it can get quite hot, and over time will deteriorate. There have even been cases where the connections to the heating element have loosened and caused a fire, though I'm not aware of this happening in the Prius.

    So while you may think it's "lame", it's normal and done for a good reason. Those of us in the north just have to remember to push a button if/when we want to defrost. :)
     
  6. BZzap!

    BZzap! Senior Member

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    How about electrical current?
     
  7. ReDave

    ReDave Junior Member

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    hey, just sayin'

    am·per·age
    ˈamp(ə)rij/
    noun
    1. the strength of an electric current in amperes.
     
  8. Former Member 68813

    Former Member 68813 Senior Member

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    you can easily override it by a remotely controlled finger pushing the button. I'm surprised you didn't think of that, LOL.
     
  9. Bluegrassman

    Bluegrassman Active Member

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    Check with a remote start install shop. They can help you.

    Posted via the PriusChat mobile app.
     
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