Blower works. Blows cold but not heat

ford
windstar

#1

I recently heard 3 or 4 “clicks” from under my dash around where the heater control is. Since then the blower will blow vent and A/C air but when the control is set to heat, it will not blow heat. I don’t suspect the thermostat because this problem coincided with the clicking. Is there a separate relay for the heater or could the heater control switch be the problem?? (FYI - there is plenty of antifreeze, so that’s not it either)


#2

It sounds like what you may have heard is the vent door. It appears the door is stuck in the wrong position.


#3

click,click,click…= blend door motor. ( Inside motor is little plastic reduction gears much like in a clock. They’re only plastic so if the door binds, the gears strip. )
Ford # XF2Z-19E616-FB , Motorcraft # YH-1764 , $59.95
You don’t say what year but 1999-2003 is the one I listed.

Question when replacing a blend door motor, What caused the door to bind to ruin the motor ?
Clean inside to be sure door moves freely.