Heater Valve | FerrariChat

Heater Valve

Discussion in 'Mondial' started by race, May 29, 2019.

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  1. race

    race Karting Silver Subscribed

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    Jeffery Mead
    I am trying to locate the Heater valve on my 85 QV it seems to be stuck on and during Texas summers make driving VERY unpleasant

    Jeff
     
    race, May 29, 2019
    #1
  2. AndruL

    AndruL Karting

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    AndruL
    Passenger footwell, up toward the right fender. You can remove the stainless steel door step, along with the under door panel cover, then follow the hoses up.
     
    Last edited: May 29, 2019
    AndruL, May 29, 2019
    #2
  3. race

    race Karting Silver Subscribed

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    Thank you sir. for that information.
    Jeff
     
    race, May 30, 2019
    #3
  4. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ Lifetime Rossa

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    It might be more accurate to say that it is "stuck off". The 61079000 hot water valve needs to be powered to stay closed so, if you've lost +12V power to the system, it will default to the open condition. Unplug it and measure the voltage between the two terminals in the unplugged harness connector when not requesting heat with the key "on" (or engine running) = it should be +12V.
    If it is +12V, but you still get heat without requesting heat, either the valve is bad or another possibility is that the coolant hoses going to it have been swapped. There is a flow direction arrow on it to show which way the coolant should be flowing, and it will only seal if the coolant flow is in the correct direction.
    Good hunting!
     
    Steve Magnusson, May 30, 2019
    #4
    jkstevens2, ronfrohock and Wade like this.
  5. ronfrohock

    ronfrohock F1 Rookie Owner Rossa Subscribed

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    Steve,
    You amaze me with your expertise. We are lucky you are here!


    Sent from my iPad using FerrariChat.com mobile app
     
    ronfrohock, May 31, 2019
    #5
  6. spicedriver

    spicedriver F1 Rookie

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    spicedriver, May 31, 2019
    #6

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