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Loud Whine from car when heat is first turned on

Discussion in 'Gen 2 Prius Main Forum' started by Tevin, Nov 30, 2018.

  1. Tevin

    Tevin New Member

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    Location:
    Lynchburg, VA
    Vehicle:
    2005 Prius
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    N/A
    Hello All,

    I have a 2005 Prius and three days ago i noticed that when i turn on the heat, the car makes a loud noise under the hood, goes away, makes the noise, goes away and does it one more time and doesn't do it anymore unless the car is turned off and restarted with the heat on. I'm not really sure what this is... fyi the car just hit 265,000 miles last weekend.
     
    #1 Tevin, Nov 30, 2018
  2. bisco

    bisco cookie crumbler

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    Vehicle:
    2012 Prius Plug-in
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    Plug-in Base
    maybe the 3 way coolant valve?
     
    #2 bisco, Nov 30, 2018
  3. Tevin

    Tevin New Member

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    Dec 6, 2017
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    Location:
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    Vehicle:
    2005 Prius
    Model:
    N/A
    I'm going in for a oil change at dealer tomorrow, i guess i could just check with them. my Maint. Required light is the only one on
     
    #3 Tevin, Nov 30, 2018
  4. bisco

    bisco cookie crumbler

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    havoc damper/motor another suspect
     
    #4 bisco, Nov 30, 2018
  5. edthefox5

    edthefox5 Senior Member

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    Open the hood and see whats making the noise.
     
    #5 edthefox5, Nov 30, 2018
    kenoarto likes this.
  6. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
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    IV
    Use the Air Conditioning active tests in Techstream to turn on and off the individual bits of the system one at a time, and note which one makes a loud noise under the hood.

    -Chap
     
    #6 ChapmanF, Nov 30, 2018
    Skibob likes this.
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