Question about 2000 Nissan Quest

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Heater on Quest 2000 V6

Heater works fine going down the road but blows cold air at idle??

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  • heldd Sep 22, 2008

    Is this a vacum operated valve system?
    Checking out previous advice

  • heldd Sep 22, 2008

    Checking out all the comments will advise results, Thanks

  • heldd Sep 24, 2008

    Yes engine starts heating up at idle after driving, radiator fan is coming on OK. Have appointment to get water pump replaced. Thanks

  • heldd Oct 02, 2008

    Problem solved , was air in cooling system parked rear end up on curb and took joff radiator cap. let set for awhile and all is cured. Thanks everyone for your help

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No the system is not vaccum operated, it is about circulation so the number one solution by tripleauto is correct. please rate this as helpful and tripleauto's solution as a fixya because he is absolutely correct.....thanks

Posted on Sep 22, 2008

  • Ronald Mueller
    Ronald Mueller Sep 22, 2008

    chances are you don't have a coolant level issue,because your check engine light did not come on and most new vehicles use the check engine light for low coolant/oil levels

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Your water pump is not circulating at lower speeds sometimes the fins get corroded off so at higher rpm you can get movement but the pump cant do its job at lower rpm. If this is the case you should notice engine temp going up more than normal at idle as well.

Posted on Sep 22, 2008

  • TripleTauto
    TripleTauto Sep 24, 2008

    did you get this fixed yet??

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First of all make sure you are not low on coolant. Then we will work from there.
Thanks,
Lee

Posted on Sep 22, 2008

  • Lee A.
    Lee A. Sep 22, 2008

    Is the coolant not low? I need response to assist further. Is your temperature staying normal at idle as well or does the engine start to heat up more then when your driving?
    Thanks,
    Lee


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You have air in your cooling system that needs to be bled out.Air could move around the system and eventually end up in the coolant bottle where it's supposed to be, but it's not likely that it will go away completely until you purge the system of air and replace the radiator cap after doing so. If air got in there in the first place, it can get there again and again until the problem is fixed

Posted on Sep 21, 2008

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Check the ventilations any air lekage.

Posted on Sep 21, 2008

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