Question about 1999 Ford Taurus

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No heat. Both hoses are hot at firewall connection. Replaced water pump and thermostat. Flushed coolant system twice, no restriction. Damper is free moving and servo motor works when temp change is adjusted. Fan is ok. Don't know what else to do. Cold air comes out of vents and ac compressor cycles when heat should be present. Thank you for any info Gene

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Well I think you answered your own question, the heater core is so crudded up on the inside that the inside flow is fast and the heat can not transfer through the crud to the metal of the core. It is 12 years old and 10 is about all they are good for. If you can pull the fan down, reach up inside the heater box and touch the core, I think you will find it is cool when the engine is warm.

Posted on Mar 30, 2011

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As a mechanic i am leaning towards a bad heater core. The core translates the heat from the cooling system into hot air for the cabin. Often times if the core is bad it leaks. check under the carpet, be keen on the smell of the antifreez and keep an eye out for foggy windows. Good luck and i hope i was able to shed some light on the situation.

~KAComstock

Posted on Mar 30, 2011

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My 1999 ford taurus is over heating what all do i need look for

Posted on May 03, 2011

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Back flush the heater core , youve got an air pocket in cooling system.

Posted on Mar 30, 2011

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