Question about 1994 Pontiac Grand Prix

2 Answers

1994 Grand Prix Air blows thru defrost and feet, not middle vents

Air Conditioner blows cold but only goes thru the defrost and the feet. Barely anything goes thru the main vents.

Last year it did but would go to the defrost when I went up hills.

Now I notice that when I come to a stop a faint amount will come thru the mains.

I've read about vacuums but not sure where the vacuum lines are.

Posted by on

  • 2 more comments 
  • Darren Weisensel Jun 26, 2009

    Thanks, but where is that?

  • Darren Weisensel Jun 26, 2009

    Where is the mode control switch?

  • Darren Weisensel Jun 26, 2009

    How do I do that? Thats a dumb question but is the only way to tear off the dash???

  • yadayada
    yadayada May 11, 2010

    no vacuum to mode control switch.

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I've had the same problem with my 1994 Grand Am. It was a vacuum leak (the controls for the vents operate by using vacuum). My battery leaks acid on the components below (still does--not sure why). There is a vacuum line that runs below the battery and when the acid builds up on the line, it eats a hole in it. I have fixed it a couple times (by inserting a thin plastic tube into the rubber hose at the break). Still can't figure out the battery acid problem, but I've got the vacuum line problem solved. I only have to repair it about every 3 or 4 years. Not sure if your problem is the same, but it could be. Just remove the air filter housing from the choke cover, and possibly you might need to remove your battery as well. You can see the vacuum lines easily then. They come from different directions and go into a bulbous shaped device in that area (not sure what that is--this last time I did the repair, I bypassed it entirely by connecting the line coming from the firewall area directly to the line going into the engine around the choke). Hope that helps!

Posted on Aug 05, 2009

  • Darren Weisensel Oct 03, 2012

    That was it. Vacuum leak under the battery!!

×

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

You might have to clean out the ducts ..could be a heavy build up of dust of other things....you can find very wierd things in cars tht arnt supposed to be there

Posted on Jun 26, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

? 7:41
www.youtube.com/watch?v=41k6UxSUM8Y
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

My 93 Grand Cherokee has a problem with "not" switching from blowing air down at ones feet to ones chest area. I know the fan is working fine, but it will only blow air thru the lower vents and...


  • Sounds like your Blend Door Actuator is malfunctioning. What that does is move an arm to open a door down on the blower motor to send the air into the passages you choose. If the Actuator goes bad or the plastic arm to the door snaps or breaks then you get air flow where ever it broke at and it won't change until you make that door function again. Please see the picture I uploaded so you can see what I am referring too.
  • The Blend Door itself were known for sticking too so you may want to investigate inside the heater box as well.
  • You will find the Actuator itself on the side of the blower motor housing.


ironfist109_29.gif



  • Good luck to you and thank you for choosing FixYa.


Regards, Tony

Jun 13, 2011 | 1993 Jeep Grand Cherokee

1 Answer

2005 Grand Prix heater works fine when blower is off-air coming thru vent gets hot; once blower is turned on air turns cold. Why?


Sounds like a clogged heater core- insufficient coolant circulating through heater core, and as soon as you blow air past the core, it get cooled off.

Jan 09, 2010 | 2005 Pontiac Grand Prix

2 Answers

Van air conditioner problem


hearter / ac door switch malfuncion

Aug 25, 2009 | 1998 Jeep Grand Cherokee

1 Answer

Cold Air Not Blowing Through Vents


Your last guess is probably the right one. The deflectors/directors are vacuum controlled and you may have vacuum line either broken or disconnected; these aren't fun to find. I would start under the hood and make sure the vacuum reservoir is intact (have seen them cracked) and then start tracing hoses from there.

Aug 18, 2009 | 1996 Chevrolet Corvette

1 Answer

Jeep AC blows cold air at defrost and feet but not through vents


There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Jul 01, 2009 | 1999 Jeep Grand Cherokee

1 Answer

1998 grand prix no heat on 1 side


thats most likely what it is. either that, or something has fallen down the defrosters and its blocking the blend door from opening or closing

Jan 21, 2009 | 1998 Pontiac Grand Prix

1 Answer

1994 Pontiac Grand Prix blows cold air on feet


ck to see if there is vacuum at the control head and if there isnt ck for incoming vacuum from the motor

Jul 03, 2008 | 1994 Pontiac Grand Prix

4 Answers

Air conditioning and heating


The vacuum line on the drivers side of the intake manifold just below the throttle body fell off.

May 26, 2008 | 2003 Jeep Grand Cherokee

Not finding what you are looking for?
1994 Pontiac Grand Prix Logo

346 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8172 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...