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You have a faulty temp blend door motor, located behind the radio. It is the motor/actuator that controls the temperature blend door in the heater box. It isn't hard to replace, but it may be a little tricky to get to. You will need to remove the radio, and way back in there, you will see a square plastic thing mounted to the heater case, either black or off-white colored with one electrical connector and held on with three or four 8mm screws. Remove the screws with a long socket extension and replace the motor. If you drop anything, you can retrieve it by removing the lower trim panel around the base of the dash at the floor tunnel, which is held in place with 4 plastic screws.

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โˆ™ 2006-04-19 18:01:13
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Q: What is the knocking sound coming from climate control system in 99 ford wind-star The heat and air conditioning work but it makes a terrible knock?
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