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2000 Mercury Sable Question: My heat only works when i am parked



, Detroit, MI, January 06, 2011, 18:01

My heat works when I warm my car up the engine gauge goes to warm but when i start driving the gauge goes down past cold and the blows cool air?

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  • Answer #1

    January 07, 2011, 02:17

    Sounds like a possible engine thermostat opening too soon and staying open. Check there first.

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  • Reply

    , February 04, 2011, 21:44

    One thing I would check is the anti-freeze. If you have added any, it may test too low. In a lot of engines, too high ratio of anti-freeze to water will cause a heating problem. Testing at about 35 below zero is a good target. I hope this helps.

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