what is it when i turn my tempature knob to towards warm from the cold position, i am getting a knocking sound that sounds as if it is coming from the dash. i changed the control panel.
If it is not very loud then one guess is that it is the blending doors.
It's probably the actuator motor which moves the blend door. If it is a click-click-click, that what iit is. The part is about 50 bucks and the entire dash probably has to come out to repair it. It's that way on the 2003 explorer.
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