Question about 2002 Ford Explorer

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WHEN I TURN THE HEATER ON IT MAKES A TICK TICK TICK SOUND AND NO HEAT COMES OUT. THE BLOWER WORKS, JUST COOL AIR COMES OUT. SOMETIMES IT WILL MAKE A LOUD NOISE AND CHANGE THE TEMPERATURE. BUT NOT ALWAYS. IS THIS A VACUUM PUMP PROBLEM?

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  • Ford Master
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It sounds like your blend door actuator is sticking. It is the one door that is operated by a motor--the others are vacuum. I do not have a picture, but maybe you can find it by following the clicking. If you can, take the actuator off the door lever and see if the door rotates smoothly by hand. If not, you may need to take the heater box out to fix it. If it works smoothly by hand, replace the actuator, which probably has stripped gears. Let me know if you have questions.

Posted on Oct 10, 2010

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