Question about 1998 Ford Windstar

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Air conditioning is on when defrost is selected

1996 windstar - air conditioning is on when defrost is selected

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That's normal. When defrost is on, it uses AC to remove condensation in vehicle to allow for faster defrosting.

Posted on Jul 20, 2009


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I have a 1996 windstar, and when I select heat or AC to my face/feet, or defrost, my engine ramps up to 4rpm's, but if I select the face or feet only my engine remains normal. What's the problem?

Could be a problem with the idle air control valve, or something electrical.
When you command the defrost or ac on, the compressor is supposed to kick on along with the radiator fan. The computer bumps up the idle to recover from the extra load on the engine. If the compressor does not work, the extra RPM is not needed.
But the RPM should only go up about 2 or 300 above normal speed, even if the compressor is not working. So if it is going up to 4000 instead of say 1000 something is going on with the idle air control.

Apr 28, 2013 | Cars & Trucks

1 Answer

1996 ford windstar blowes cold air thru defrost only warm in back

For some reason this question was listed a dozen times within an hour or so.
Usually the problem is a blend door under the dash. The blend doors direct air thru the heater core and the vents.

Jan 12, 2013 | 1998 Ford Windstar

1 Answer

Air comes out the defrost on our ford windstar but not through the vent

There is a directional door actuator motor that has gone bad,removing the dash is needed to access the actuator motor.

Jun 12, 2010 | 1996 Ford Windstar

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The air conditioning does not always work. The air comes out of the defrost or lower heater and not out of the vent.

Look for broken or cracked vac hoses. System designed to FAIL in the defrose mode..

May 30, 2010 | 1996 Ford Windstar

1 Answer


This is because of the mechanical mode selector. This mode selector need to be refitted. It can be done with in 15 minutes by the appropriate technician.

Jul 25, 2009 | 1998 Ford Windstar

1 Answer

Vent controls wont switch from defrost to any other selection replaced switch already I have a 2003 ford windstar, heat and cold air will only blow from the window defrost vents, any other selections...

You have a vacuum leak.Defrost is the default postion(no vacuum).
See if you can locate the small black vacuum line that goes inside the vehicle on the passenger side near the heater core. The trace it back,should see it going to a canister then to the intake manifold.Make sure it is not disconnected or broken somewhere.

Mar 02, 2009 | 2003 Ford Windstar

1 Answer

1996 ford windstar gl

for rear defroster grid lines, there are tiny gaps or cuts in the grid lines. get repair kit and paint over gaps. use masking tape so lines aren't too thick. kit @ $10. you can do this.

Feb 11, 2009 | 1996 Ford Windstar

1 Answer

1996 Ford Windstar Engine Idle Problems

throttle position sensor is not working properly.

Aug 24, 2008 | 1996 Ford Windstar

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