Question about 2001 Ford Escape

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When turning on the heater or ac, air only comes out of the defrost on any position the switch is in. How would you correct this problem.

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This is most likely caused by a vacuum leak in the system. When vacuum is lost it will default to defrost as a safety precaution.You will need to locate where the leak is and either repair or replace the line.

Posted on Mar 20, 2011


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Why wont my ac or heater come on in my 2003 chevy impala,but the defroster it work on defrost only when i turn it to the heat position, but not on ac mode.

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Hope I can give you some direction. Speaking from a generic sense all ac/heaters these days have a door or doors in the blower box that control air flow from the main part of the box to different positions when you ask for vent, heater, mix, defrost etc..

Most these days are operated with a small electric servo/motor and unfortunately the mostly have plastic gears that wear and can "thump-thump" as the motor cycles trying to open or close the flapper door.

Try to change the air direction from Max AC to regular ac to heater, defroster, bi-level etc all with the AC switch in the on position if you have a separate on/off switch.

Listen to the sound and see if it comes and goes with a different location of the selector switch.

One last question. Does it happen at idle or driving down the road at any particular speed?

Lets start with that and see what happens. This is interesting.

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No the switch is probably ok. The problem is most likely the door actuator motor. It is a small electric motor that opens and close the the correct door to direct the air in the ac/heating ducts. These motors take place of the old cables that did the same job.

Btw, I’m available to help over the phone in case u need at

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