Question about 1996 Volkswagen Jetta

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Jetta water temp gauge shows temp with engine off and engine cold

When the key is turned on the gauge will go to the 1/2 way mark and just stay, after running for approx 10 miles it will go up slightly
1996 vw jetta with 2.0L 4 cyl, unit was working just fine when parked

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  • btstrong2848 May 22, 2009

    sensor is new and it does not need to be connected for this problem to happen

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  • 168 Answers

Try replacing the sending unit, It is easy but did it when the car is cold

Posted on May 22, 2009

  • Jack Bowser May 22, 2009

    I think there is a temp. sending unit (for the gauge with 4 wires) and a temp sensor (for the computer with 2 wires) if it is a gas model

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The thermostat helps your car in extreme weather. It helps your engine warm up in extreme cold so your heater will work sooner. And it helps you car cool itself off in extreme hot weather. As your engine water temp rises, the thermostat will open allowing the water in the radiator (that has been cooling) to flow into the engine block. The water that was in the block will go into the radiator to begin cooling.

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