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Posted on Jul 14, 2011
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My 99 vw jetta reads 190 degress but in the water resavor seems to be boiling hot and water is not circulating thru the system. Just replaced the thermostat and also radiator. What else could be causing this heating problem? Also fans do kick in when ac is on.

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  • paulastarrc Jul 14, 2011

    the first thermostat was doing the same thing. and correctly putting on the second thermostat also doing the same thing.

  • paulastarrc Jul 15, 2011

    My 1999 vw jetta is over heating but the gauge stays at 190 degrees. we have installed a new radiator, thermostat, and preged the system. The reason for all this was cuz my car had a leak and notice a milky film in the resavor. had my head rebuilt new gaskets bolts too. and everything else i said above. What else is there for me to do? btw car runs great just still over heating!

  • paulastarrc Jul 15, 2011

    If it needs a water pump wouldnt there be a sensor to let us know that it has gone out? And if there is a sensor which one would it be?

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Jose Cada

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  • Posted on Jul 15, 2011
Jose Cada
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Welcome to Fixya

You need to replace the water pump. This part keeps the water circulates from radiator to engine.

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  • Jose Cada
    Jose Cada Jul 15, 2011

    there are no sensor for the water pump. but clearly on the problem you described it is already a water pump failure. Water will not circulate if the thermostat is bad and radiator is clogged then third is water pump quit working.

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Justin Fitzgerald

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  • Posted on Jul 14, 2011
Justin Fitzgerald
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You may have installed the thermostat in backwards, when it gets hot do the hoses feel like they have too much pressure?

  • Justin Fitzgerald
    Justin Fitzgerald Jul 15, 2011

    Now you think that the water pump is faulty? Does th vehicle have heat? If so does the car shut off or ever go past the 1/2 mark on the temperature gauge?

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