99 Windstar Heater Problem

[King]

Tried looking at everything I can think of and can't get the damned thing to blow hot air. I've pulled down the lil box where the heater core is located and it'll blow 1000 degree air out of the gap but for some reason it's not making it's way through the vents. Any ideas?

Looks like the blend door is still functioning and isn't cracked or broken. Why isn't the heat making it from point a to b? AC works really good.....heat......well you know. I have heard a annoying little click from that little white box behind the stereo when I adjust the heater/ac controls and decided to take it apart cause I hear the gears sometimes strip in that thing........ well all the gears looked fine to me.

Blend door motor?
Blower Motor? Wouldn't the AC fail to work if this was bad?


This is frustrating....... I can't figure out the problem

When I dropped the plastic heater core housing thingy there was a wooden piece sitting on top of the core with little wedges cut into it...... I can assume that is not a Ford factory part. Was someone trying to wedge the blend door open or something. I cant figure it out

[psumark90]

I just paid $1500 to have the blend door motor and arm replaced in October.

Sounds like the exact same issue.

Are you getting heat from the back vents? If so, it probably is the blend door motor and arm.

[troy5018]

If the blend motor is going out it may make that "clicking noise". Look at the white box and try adjusting the heat control, with the van running of course! You can see if it is working properly. I did a quick "temp" fix by inserting a screw driver into the square opening on the front of the box and opened it up all the way. I then unplugged the harness to the box. This has given me full heat until I can get the motor replaced.

[vindctar]

Well, after opening the heater core housing, if you were able to move the blend door up and down (with the blend motor still inserted), then "the blend door" has been broken at the point where blend motor inserts into the housing. I believe your blend motor is still fine; you can test it. Remove the screws that are holding it in place, gently pull it out completely from the blend door hole and test it by turning the air mixing switch on the panel. If the short rod on the motor rotates, then the motor is fine. I replaced the blend door on my windstar myself; labor intensive! This is how I did it. I bought the blend door at the junkyard; removed it myself. Remove the blend motor (if you don't do this, the blend door will break at its spine and be rendered useless). Open the heater core housing and push it as much down as you can. Hold it open. Using a sharp saw blade, cut through the upper part of the core housing (this is the part that contains the blend door) at an appropriate angle to reach the hole where the blend door rotates. You may have to widen the cut, fiddle here and there to pry the door out. Be patient and gentle. I got a few cuts on my forearm while doing this. Now, in order to install the door in your car, repeat this process. You will have to introduce a cut in the core housing of your car and repair it later. Remove the broken door. Using the saw blade, cut at an angle until you reach the motor hole. Gently and carefully slide the replacement door in. I used high temperature epoxy putty (Home Depot has it) to repair the cut in the housing and also fashion the hole a bit to make it as round as possible (so the blend door is held secure and moves freely). Wait for the putty to cure. (Before putting it in, I reinforced with epoxy the blend door spine at the end where the blend motor inserts; the polycarbonate material that this door is made of becomes brittle after longterm exposure to extreme heat). Now close the heater core housing, install the screws and finally install the motor. Test and it should work; mine does!!! It took me sometime to work this and it was worth it. Good luck. (Questions? email me at raheelshafi99@gmail.com).