Question about 1998 Ford Taurus

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Front defrost vent doesn't blow any hot air.

When I turn my selector switch to go to having the the air blow down at my feet to defrost the windows in front. I get no air flow to the front of the window.

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  • Anonymous Mar 18, 2014

    No air is flowing to the windshield when in the defrost position

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  • Ford Master
  • 77,514 Answers

You may need to replace the mode selector switch.

Posted on Nov 04, 2008

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Posted on Jan 02, 2017

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2 Answers

Vents won't blow hot or cold air. Comes from defrost and feet when you put fan on.


It's the vent actuator, it moves the baffle that changes the direction of the air flow.
Here is a video of a broken vacuum hose that creates the same problem.

It could also be a failed actuator.

Sep 19, 2016 | 1997 GMC Safari

1 Answer

Why is my 97 honda prelude always blowing hot air at my feet even when the air is off


HONDA EXPERTS accord vents dont switch anymore? ' Yahoo Answers

https://answers.yahoo.com/question/index?qid...Sep 13, 2008 - my 1994 honda accord ex has a problem. the heater vents dont switch ... defroster and feet etc.. none of those work anymore. nether does my AC, ... still no change. they will blow hot and cold air out of the front "in your face" ...

Honda Prelude - A/C delete - YouTube

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Jul 30, 2013 - Uploaded by Nicolas Alvarez
Honda 98 prelude 5th gen A/C delete H22A New belt size = 37 inches (same as 97 accord) ... New belt size = 37 inches (same as 97 accord) ... How to: 1990 Honda Prelude - Diagnosis Air Conditioning Inop and a Vacuum leak ... Fixing A Car Air Conditioner That Blows Hot Air - Duration: 3:42. by Scotty ...

Sep 25, 2015 | Honda Cars & Trucks

1 Answer

What causes the ac to blow cold in the rear but warm air in the front?


These vehicles came with 2 types of ac controls.
The vacuum control system uses vacuum to actuate the vents and ducting from hot to cold. A lot of times the HVAC vacuum line in the engine bay (black hard plastic) is either broken or disconnected from its vacuum source.
The electronic vent control: does everything at the control knob via vent actuators and the control panel itself. With this one it could be any of the components. You would have to locate them and verify operation by moving temp/vent selector.

May 08, 2014 | 1997 Ford Expedition

1 Answer

1997 Ford Taurus front defrost not working


. Air won't blow out of the floor or center vents just defrost ? Do you have manual or automatic climate control ?
Air Flow Control
Air flow control is accomplished in the following manner:
  • Primary control is through the function selector knob mounted on the A/C-heater function selector switch, which is part of the integrated control panel.
  • The function selector knob has the following positions: OFF, MAX A/C, A/C, PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST and DEFROST. The A/C-heater function selector switch combines a vacuum selector valve with an internal electrical switch.
  • The vacuum selector valve directs source vacuum to various vacuum control motors (18A318). Refer to the Vacuum Control Diagram , System Airflow Schematics and Vacuum Control Chart .
  • Two internal, single-pole electrical switches are also controlled by the A/C-heater function selector switch. The combination of these electrical switches controls the electrical supply to the A/C clutch and heater blower motor switch (18578).
  • The position of the function selector knob determines the manner in which the system will operate.
  • Each position of the function selector knob is detented for positive engagement.
  • Vacuum Control Motors The vacuum control motors (18A318):
    • are located on the A/C evaporator housing, A/C recirculation air duct and heater air plenum chamber (18471).
    • direct system airflow to the vehicle interior as determined by the remote climate control module or manual override.
    • The five-passenger seating configuration has an additional vacuum control motor mounted on the heater air plenum chamber to control airflow to the rear seat A/C register (19893).


vacuum control motor-i4bq0ig33y1522pr2d2rrkk3-2-0.gif

Jul 09, 2017 | Ford Cars & Trucks

1 Answer

Defrost selector turns but does not change where the air is flowing


Sounds like the switch nob itself is wore out. you may need to replace that assembly, not just the nob but that cluster that has the nobbs on it. good luck

Dec 07, 2013 | 1996 Geo Prizm

1 Answer

Cold incoming air with warm air


heater box is warped doors not closing fully

Dec 30, 2008 | 2004 Chevrolet Venture Passanger

1 Answer

1999 Dodge Intrepid Heating/Air Conditioning


check out selector switch,vacuum hoses ,check transfer door write if did not solve

Oct 26, 2008 | 1999 Dodge Intrepid

2 Answers

No air, ac, heat out of in dash face vent


check the hoses connected to the vacuum advance ball, it has probably begun to decompose...

Aug 05, 2008 | 1996 GMC Jimmy

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