Question about 1999 Ford Taurus

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Heatercore does not get hot only one hose is hot

Heater blows cold air when temp control seton high

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The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.
Flush the heater core 2-3 times, and if the obstruction does not clear, a new heater core is required.

Posted on Jan 29, 2009

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First make sure you have the radiator full of antifreeze also check overflow to make sure its at proper level . then let car warm up and feel hoses that go to firewall tword heater core and see if one of them are warm if so you have a blocked water control valve or its got a vacuum line off going to it .. Thanks Jerry holler if this is not it we will go from there.

Posted on Jan 29, 2009

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