Question about 1998 Ford Mustang

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Air flow up on windshield vents can't get air flow through dash vents;

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  • 62 Answers

Check for broken or split vacuum lines under the hood to those vents.

Posted on Nov 30, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: There is no air flow

You need part GM Part number 89018675 or ACDelco 15-73596. The Mode Selector Actuator. What happens is the part is a CHEAP part POORLY designed and when it goes to turn the flaps inside the HVAC unit its the plastic gear slips instead of turning the flap!!!

Just to forward you you might want a deal to install this art for you unless your good at fixing your own vehicle, because you need SMALL sockets and a lot of patience to get this part in!!!

The part is ALMOST directly above the steering shaft for your steering wheel, so theres a lot you got to remove before you will even see them!!!

I only recommend you to have a dealer put this part in for you, unless you have your own service manual!!

Because there is 5 of these darn things and if you pick the wrong one you will have to do it all over again!!!

3 on the Drivers side and 2 on the Passengers side!!

But replacing this part SHOULD solve all your problems!! AS it did for me and i was having the same issues as you have described!!


Posted on Jul 22, 2008

tommyboinow
  • 324 Answers

SOURCE: there is no air blowing out the vents on the dash board when i turn the ac on

you have a bad control unit, the thing you use to switch from one thing to the other, it needs to be replaced.

Posted on Nov 26, 2008

  • 18 Answers

SOURCE: Can not adjust the direction of air flow for the heater or defros

or it could be that you need to replace the air filter that is located underneith the dash on the passanger side slightly to the left

Posted on Dec 29, 2008

  • 20 Answers

SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Posted on Feb 23, 2009

kn1ckfan
  • 8 Answers

SOURCE: HVAC vent selector does not function. Air flow is

THe blend door seems to be stuck. When you change settings from defrost to floor air or, vent, the blend door opens and closes directing the air to the place you want it to go to. I have had some success spraying a lubricating oil such as WD40 under the dash on the blend door. You need to get under the dash with a flashlight to locate it. It looks like a flap. Spray it with a couple of shots of the WD40. Go easy on the spraying as you may be inhaling the fumes. Keep the doors and windows open to minimize the fumes. Wait about 1/2 hour and try the A/C functions. (defrost, floor, vent air)

Posted on Mar 09, 2009

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2 Answers

Ac air does not come out on the dash boared vent but blows on windshield. what is the problem?


there will be a air flow setting knob that controls whether air is defrost or on feet or from the console vents.

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My 1999 buick park avenue a/c will blow out at window vent and floor vent but not at dash vent


It's one of the blend door motor drive gears that has cracked. As the motors try to move the blend doors to divert the air flow, the gear attached to them slips on the drive shaft. You need to remove them, inspect for the broken or cracked drive gear and replace them. This is a very common problem with these older GM vehicles.

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ventt hatches stock in close position, lever mechinsim broken or stock

Jun 22, 2009 | 2003 Lexus RX 300

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Heat and AC vent problem.


most likley you have a vaccume leak somewhere but also the linkage to the door that that directs the air flow may be in a bind. another possability is the hvac controlls. hope this helps

Jun 08, 2009 | 1998 Ford Windstar

1 Answer

HVAC vent selector does not function. Air flow is


THe blend door seems to be stuck. When you change settings from defrost to floor air or, vent, the blend door opens and closes directing the air to the place you want it to go to. I have had some success spraying a lubricating oil such as WD40 under the dash on the blend door. You need to get under the dash with a flashlight to locate it. It looks like a flap. Spray it with a couple of shots of the WD40. Go easy on the spraying as you may be inhaling the fumes. Keep the doors and windows open to minimize the fumes. Wait about 1/2 hour and try the A/C functions. (defrost, floor, vent air)

Mar 09, 2009 | 2002 Buick Rendezvous

2 Answers

Can not adjust the direction of air flow for the heater or defros


or it could be that you need to replace the air filter that is located underneith the dash on the passanger side slightly to the left

Nov 17, 2008 | 2005 Chrysler Pacifica

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