Posted on Sep 14, 2017

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2002 mercury sable

I ahve a 2002 mercury sable and the heater will not heat. you can feel a liitlt hot air coming out of the vents as long as the blower fan isn't turned on. as soon as you turn thr fan on it blows cold air. the radiator fans also seem to be running alot , they will kick on every few seconds. i have changed the themostat, flushed radiator, and blew heater coil out. HELP

Anonymous May 11, 2010

check at the part store to see if the car has a temp sensor to run the fan

1 Answer

Lawrence Oravetz

Mercury Master 10,558 Answers
Posted on Sep 14, 2017

Lawrence Oravetz

Mercury Master

Joined: Jul 28, 2008

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The blend door that regulates the airflow over the heater core may be stuck in the AC position. It is inside the case and is most difficult to get to. There may be a YouTube video that may help you locate it and test it.

3 Related Answers

Paul Thoegersen

95 Answers
Posted on Dec 02, 2008

SOURCE: 2002 mercury sable heater wont get hot

you have a broken or stuck temp blend door in the heater case. or the servo motor is broken. this sits on top of the heater case

cheap repair

1565 Answers
Posted on Jan 13, 2011

SOURCE: 2002 Mercury Sable heater does not heat up. It

There is a heater blend motor that is directly behind the dash panel, center, bottom, by the floor. It has four 5/16" screws, and a 6-pin wire connection in the center. It takes about 5 minutes to change it out and the part is $42, give or take a few dollars for taxes.

The blend door is what switches the air to hot or cold

Make sure coolant level is full.

Testimonial: "very helpful! We'll try this. Thank you very much."

john h

29494 Answers
Posted on Jul 07, 2011

SOURCE: 96' mercury sable smoking from

didnt state color of smoke if blue smoke burning oil internal damage to engine and with knock could be rod--bent/stuck valve [blown engine ] white continuous smoke burning coolant usually a blown head gasket but add knock engine damaged

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