Question about 1997 Chrysler Sebring

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I got no heat if I go faster then 40 MPH, and if is super cold outside.

I'm having porblems with my heater, it does heat up when it warm outside or if I Idle the car for long time (10-20)min. Then when I start moving the temop guage goes to the cold and never goes up again.
it a 97 sebring convertible JXI

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  • jav008 Jan 30, 2009

    thanks for you help, I go see what can I do to get it fix

  • Anonymous Mar 25, 2014

    speedometer goes to 20 mph when the car is idling and not moving in all gear ranges

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Sounds like your thermostat is stuck open to me.

Posted on Jan 28, 2009

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2 Answers

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What is happening here is that the faster the heater blows air through the fan, the more it cools the liquid in the heater core, and so heat output is reduced. The root of the problem is either the engine is not warming up enough, or the heater core, and/or heater core lines, are plugged up, not allowing the water to circulate properly in the heater core. Here is what I would try.

1. Top off the radiator and overflow.
2. Is the engine warming up properly? Is your temperature gauge showing normal temperatures? If it is not, then replace the thermostat.
3. If steps 1 and 2 do not solve the problem, get the vehicle in a shop, locate the heater core lines, take them apart and flush out the heater core. Look for blockages in the fittings. Do a flow test on the core. It may be clogged and need to be replaced.

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Try a new thermostat and see if engine warms up faster and better.

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