Heater working funny

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by nudriver, Jan 20, 2016.

  1. nudriver

    nudriver Member

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    Have any of you guys experienced this?

    I will have my heater on with upper vent selected and it will randomly switch to bottom vent. Then I put it back on upper vent and it blows very hard. It's like it has a mind of it's own. Am I driving a Transformer? lol.
     
    #1 nudriver, Jan 20, 2016
    bisco likes this.
  2. bisco

    bisco cookie crumbler

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    are you touching the fresh air/recirc button at all?

    are you in manual or auto mode?
     
    #2 bisco, Jan 20, 2016
  3. nudriver

    nudriver Member

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    Not sure but wondered if it was the fresh/recycled air option. Is that it?
     
    #3 nudriver, Jan 20, 2016
  4. bisco

    bisco cookie crumbler

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    it's possible. for some reason, toyota programmed that to change the direction/fan speed.
     
    #4 bisco, Jan 20, 2016
  5. Former Member 68813

    Former Member 68813 Senior Member

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    maybe you are pushing the filtered air button? check again.
     
    #5 Former Member 68813, Jan 21, 2016
  6. nudriver

    nudriver Member

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    What's that?

    What do you mean?
     
    #6 nudriver, Jan 21, 2016
    Last edited by a moderator: Jan 21, 2016
  7. Former Member 68813

    Former Member 68813 Senior Member

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    see the car manual.
     
    #7 Former Member 68813, Jan 21, 2016
  8. bisco

    bisco cookie crumbler

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    the hvac is programmed to change the air direction based on fresh or recirc air, i'm not sure why. it's very confusing.
     
    #8 bisco, Jan 21, 2016
  9. qdllc

    qdllc Senior Member

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    Is "Auto" lit?

    I find that Auto overrides your vent selection. Front defrost does up the air speed because it's an "on demand" feature, but I've always had an easier time having heat going to the windshield and floor at the same time...but the system doesn't seem to accept that configuration on Auto mode.
     
    #9 qdllc, Jan 26, 2016
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