Question about 1999 Ford Windstar
Sounds like the blend door motor. these are known to go bad. the plastic gear strips and when you change the temp, it turns inside and makes a clicking sound
Posted on Oct 03, 2009
Testimonial: "Thank you. Can you tell me how to replace the blend door motor? Is the specification for the blend door motor for the front different from the rear?"
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Posted on Jan 02, 2017
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Jul 02, 2016 | AC Cars & Trucks
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Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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