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Buzz from climate control system - What is it?

Discussion in 'Gen III 2010+ Prius Main Forum' started by mightyyam, May 26, 2011.

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  1. mightyyam

    mightyyam New Member

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    There is an intermittent buzz coming from the center console of my 2010 Prius trim level 2. It seems to be coming from the climate control system. It lasts for about three seconds, and it sounds like a fan with a bad bearing or rubbing against something else.

    The buzz occurs when starting the vehicle after it has been off for several hours, and intermittently while driving (maybe once every couple of days), and exactly one minute after powering off. It began occurring a few months ago.

    I asked my dealer to fix it but I was unable to duplicate the problem at their service bay. Very frustrating!

    So what's wrong with my vehicle?
  2. Corwyn

    Corwyn Energy Curmudgeon

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    Leaf in the vent duct?
  3. BrettS

    BrettS Active Member

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    Are you sure it's coming from the climate control system? I wouldn't expect the climate control system to be doing anything at all once you shut the car off and the fact that it happens consistantly after you shut the car off leads me to believe that it may be something else. Of course... I don't know what else.

    Have you tried driving with the climate control system off to see if the problem still happens?
  4. yam

    yam Junior Member

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    Yes. It seems like the system is shutting down about a minute after turning off the car.
  5. yam

    yam Junior Member

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    Or maybe something else that is behind the climate control console??
  6. bisco

    bisco cookie crumbler

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    are you no longer mighty?
  7. yam

    yam Junior Member

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    Mighty is as mighty does. I'm on a different pc right now, not sure how I ended up on a different login.
  8. bisco

    bisco cookie crumbler

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    gotcha, sorry i don't have any idea.
  9. yam

    yam Junior Member

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  10. yam

    yam Junior Member

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    last bump.helloooooooo?????
  11. DaYooper

    DaYooper New Member

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    It its hard to diagnose from your description. I know that in my tundra, after I changed the cabin air filter, a little piece of leaf got stuck in the blower fan. It was an easy fix. I haven't looked at the schematics for the HVAC system on the prius so I am not even sure where the blower is at.
  12. yam

    yam Junior Member

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    Nope, definitely not a leaf in the fan. The noise comes from near the climate system, not from the vent. It occurs at certain times, including exactly one minute after powering down the vehicle (with no air movement), and the noise is always the same. It seems to be something in the climate system buzzing as it shuts off, then buzzing again as it powers back on.
  13. Slovewell

    Slovewell New Member

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    You aren't hearing the brake booster, are you? Does it do it with everything off (radio,climate control)or in accessory mode? The AC compressor buzzes but that is more of an outdoor noise.
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