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Ventilation no cool air coming out of vents inside car a/c working ok

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  • Hyundai Master
  • 3,287 Answers

Hi Arthur,

This can be due to a number of reasons ranging from a simple blown fuse to a large leak that has permitted the refrigerant to escape from the system.

Check your car's owner's manual to locate the fuse box and the the air conditioner fuse. Check and replace if blown with the correct size replacement (as shown in the manual or fuse box - not necessarily the same size as the old fuse).

Newer cars use a "serpentine" belt - a single belt that "snakes" around every pulley; while older cars had dedicated belts for the alternator, power steering air conditioning, etc. You may have simply broken the A/C belt if yours is an older car.

Another source is a leak of system containing the refrigerant. A simple recharge of the system by a trusted mechanic should get you going again for $150 or less. All systems leak - but many systems never need recharging because the leak is so small. regardless, the mechanic should do a leak check with nitrogen first to determine how big your leak is - and if easily repaired - he should be permitted to make these repairs. Small leaks may take months or years to permit enough refrigerant to escape before the A/C system no longer functions. A large leak may render the system unusable in a few days, hours or if big enough - mere minutes. Obviously, paying $150 for a day or two of air conditioning is not very wise - that is why I suggest finding out just how large the leak is by "leak checking" before blindly recharging.

These are a few of the common problems - there are others - bringing your car to a trusted mechanic is the only way to be sure. Good luck!

Posted on Jul 10, 2013

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Posted on Jan 02, 2017

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eitan
  • 291 Answers

SOURCE: white smoke from air vents

Could be an incorrect refrigerant charge or defective pressure switch causing the evaporator to freeze and the air flow over it is causing the ice to melt and the resulting white smoke is condensation

Posted on May 15, 2008

SOURCE: 1995 Jeep Grand Cherokee- Air vent problem

check your vaccum lines, thats your problem

Posted on Jun 26, 2008

  • 1 Answer

SOURCE: 2002 Astro van ventilation fan problems.

The problem is a 1/8 diameter hose that runs from the front of the engine over the top and connects at the rear of engine on the drivers side. It is a vacuum hose #GM15967970 It cost about $6.22 at your GM dealer. Hope this helps Bill. My E-Mail is Uflyups@aol.com

Posted on Aug 05, 2008

  • 3 Answers

SOURCE: 1992 BMW 535i - Ventilation Problem

It could possibly be the cabin air filter is clogged, especially if it has never been changed. Aside from that it is probably one of the stepper motors that adjust the various vent gates in the air passages under the dash. Although replacing the cabin air filter on this car is fairly easy, comparatively speaking, you do have to remove the glove box in order to do it.

Posted on Apr 14, 2009

  • 7 Answers

SOURCE: 2007 Chevy Uplander Rear Overhead A/C Vents Won't Work

Have you checked the Aux switch near the bottom of the center control console.
There should be a knob with: Aux, Off, 1, 2, 3. This is the switch for the rear AC blower.
If the driver wants to control the rear AC, use the 1, 2, 3 settings.
If you put it on Aux, Than the rear AC is controlled by the passenger in the back seat using the extra controls located on the Overhead DVD player. (The front AC must be on the rear to work)

Posted on Jul 17, 2009

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THERE IS A MAIN AIR VENT IN THE CENTER CEILING THAT BLOWS COOL AIR. SHOULD THE SMALL VENTS IN OTHER ROOMS WORK TOO? & WHY NOT?


Hi Missy:
Your question is in the cars and trucks section, but it sounds like it is about your home ventilation system.

I'm thinking that you probably have an HRV (Heat Recovery Ventilation) system that you are asking about.
- Even in the non heating seasons, these units are intended to operate for 20 minutes of every hour, when humidity gets high, or when a manual timed switch is pressed for bathroom exhaust fans.
- Inside air from the bathrooms and possibly kitchen is sent through the HRV to the outdoors.
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Hope this helps.
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hi

this is because
1.there is some blockage in the line comin up and to sides.
2.the selector switch is not properly functioning. the flaps got stuck and it may allows only air to pass through the floor vents.


please vote me if my answer was useful to you.

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Almost every car(including yours) has a flow through ventilation system which means even with the air turned off air will still come through the vents. Its hot because of outside temp and engine temp. 
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2002 Astro van ventilation fan problems.


The problem is a 1/8 diameter hose that runs from the front of the engine over the top and connects at the rear of engine on the drivers side. It is a vacuum hose #GM15967970 It cost about $6.22 at your GM dealer. Hope this helps Bill. My E-Mail is Uflyups@aol.com

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