Question about 1996 Ford Windstar

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Air and heat stuck on defrost.have tried another control swith from salvage yard and checked all vacuum lines for leaks,cracks and good connections.cannot find problem

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You have something preventing your air flow control doors from working properly

Posted on Oct 07, 2009


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My air conditioner will only blow out of the defroster and not my front vents on 2002 ford taurus any suggestions

Sounds like you have a vacuum leak to the control head. When you lose vacuum the airflow defaults to defrost. Check the vacuum hoses coming into the car on the passenger side under the dash. Supply vacuum is the black tube. There are five colors. Blue, red, yellow, white, and black.

May 06, 2014 | 2002 Ford Taurus

1 Answer

Only blows hot air out defrost

sounds like either one of your blend does is stuck or a vacuum line is off or has a leak, to test the vacuum lines, you could try to see if you see one off or cracked, but the best way is to smoke.the system, this will find pin holes in the vacuum lines if a blend door is stuck open or closed, it could be vacuum leak, the vacuum actuator for that blend door is not working, if you can see the actuator, see if you can move the arm, if you can it is working, also use a vacuum tester on it to pull vacuum to see if it is working be careful when reaching around under your dashboard, you can set off your.airbag at any time, and that would hurt if you get it in the face

Dec 04, 2013 | Chevrolet Tahoe Cars & Trucks

1 Answer

I have a 2005 Crown Victoria. The heat/air will not blow through the vents nor defrost. Checked the blower, changed control panel, checked fuses...nothing worked. Straight wired it to a ground wire it...

ford used steel control cables on some modles with plastic ends they break off and you lose control of the system nothing will work you can get the cable from ford or a wrecking yard other modles used vacuum controls a leaking vacuum line and the same thing no control trace the lines on the vacuum types and find the leak

Mar 20, 2013 | Cars & Trucks

1 Answer

Why is my jeep stuck on defrost?

you have to check vacuum canister and vacuum lines. when a vacum line is cracked or canister has a crack you cant control air directing doors in hvac system, becasue engine creates vacuum and this canister is connected to vacuum lines and you can only control hvac system when vacuum exist on electric panel equipped Ac systems, you do not need vacuum to control blending doors. there are electric motors.

Oct 27, 2011 | 1993 Jeep Cherokee Country

2 Answers

1993 jeep cherokee country blower stuck on defrost.

Sounds like a VAC. Line came off or is cracked, a vacuum leak causes the heater to go into default mode( defrost ) for safety reasons...

Oct 27, 2011 | Cars & Trucks

1 Answer

Air conditioner gets stuck on defrost and the cruise control stops working at the same time.

Vacuum leak for sure. Check the vacuum lines in the engine compartment. Specifically near the fire wall for any cracked lines or broken connectors. Also look at the vacuum resevoir for a crack. You can also assist in locating the leak by running the engine and listening for a hissing or sucking sound. Let me know if helps. I would need to know year and moel to help mire if this first go around doesn't help.

Aug 14, 2010 | Jeep Grand Cherokee Cars & Trucks

1 Answer


Hope someone has helped you already. Can make a few comments. Some of the switching controls are vacuum and although the lines going to them may be okay, the vacuum pods (called motors or engines) may leak or a rod which attaches to the vent flaps may have hopped off. Other pods, engines, motors, are electric and may just be dead. The dash controls on Lincolns have self-diagnostics and I can not say your Ford has this feature. My digital display on a 2002 high end Marquis may be different. I suggest you try to remember when the system was adjusting temperature levels by itself if you heard a tiny motor sound or another electric motor sound when changing from def to floor to vent etc. If this sound is missing now, there is your problem.

There are online Salvage yards which can expand your ability to get a used part. There are also good youtube videos of under dash repair for problems like yours. Your friend is probably right about the problem area. Just notice that a part called a control head is the dash control. Your repair search should include make, model and year. Hope this helps.

Oct 20, 2017 | 2004 Ford Crown Victoria

1 Answer

I hove 1998 jimmy heat works good ,when i change

The switch that controls the defrost, heater and vent settings have gone bad and needs to be replaced. Auto Zone should have that part or you can do the Salvage Yard for around $10.00. The switch that controls the setting has a diaphragm and when it fails, the vacuum from the air lines starts to make the sound you hear and there is not enough pressure to engage vent doors. It take about 20 min to replace from start to finish and your only going to remove two screws from the dash over the instrument panel, the trim panel around the stereo and climate control just clips in place. You don't have to remove the trim panel, it's to much of a pain. the climate control is held on by 4 bolts and the vent setting is held on by one bolt. Once you have the climate control panel unbolted from the dash, disconnect the vent control vacuum lines and then replace the vent control switch. Once replaced, put everything back together in reverse the way you took it apart. Good luck and check that the new vent control works before you put everything back together, just be take caution when you have the engine running to check.

Nov 07, 2009 | 1995 GMC Jimmy

1 Answer

1994 Buick Roadmaster won't divert heat to defroster or floor

There is a vacuum line that's plastic on the passenger side back near the firewall. Sometime they have a little black ball looking thing (vacuum canister) that the vacuum line hooks to. Look for vacuum leaks in that area. That will cause the problem you described.

Jan 12, 2009 | 1994 Buick Roadmaster

2 Answers

Comfort control mode

This is a malfunction with the climate control switch. The switch is electronic and will need to be replaced.

Jul 22, 2008 | 1998 Chevrolet Corvette

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