Question about 2003 Pontiac Grand Am

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Only the center dash vent blows heat and the rest of them very little power ...why?

There are five vents across the dash. The center vent blows strong and lots of heat. All the rest of the vents blow hot air but with very little force. I have noticed the rear defrost is not as powerful as well. Any ideas?

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  • Master
  • 937 Answers

There are multiple issues that prevent heat from coming through the vent. You'll need to see a mechanic. ----------------------------------------------------------------------------
Multi-cardiag M8

Posted on Jan 24, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1118 Answers

SOURCE: 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

Posted on Jan 21, 2009

  • 4 Answers

SOURCE: Air comes out of the defroster and floor vents but not the air co

under the hood on the firewall there is a square boxlike cover beside the maxifuse&relay. there is a vacucum hose there that controls the vent shutoff had same problem with my 93 bonneville sse when purchased, check to see it has no cracks or has pulled out of rubber connecter .

Posted on Mar 28, 2009

garydillon
  • 42 Answers

SOURCE: ac vent problem

Damper/flap for driver's side is probably stuck. Try moving the selector from cold to hot several times. Also, move the recirc/outside air control if the previous doesn't work.

Posted on Jun 02, 2009

Molson02536
  • 3854 Answers

SOURCE: 2000 pontiac montana air conditioner driver side

That is correct, the air blend door actuator. "flapper valve" may need to be replaced or cleaned and free from binding up. Good luck and hope this helps. If there is an Auto Zone in your area, they can order the part you need and give you the step by step instructions to removing the old actuator and replacing it if it's damaged. Good luck and keep me posted, be glad to help. 

Posted on Aug 22, 2009

redds55
  • 2620 Answers

SOURCE: The blower fan on my 2006 pontiac torrent

The heater blend door actuator (motor) is faulty.Replace actuator

Posted on May 06, 2011

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There's definitely an issue with your drivers blend door motor whether it's a linkage issue or a motor issue you will need to investigate more it can be a very in depth job, in some cases the entire dash needs to come out of the vehicle.
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On the motorcraft parts web site, you can blow up
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When this repair is done at the dealership, the tech is paid only 6 hours. The job takes 10 to 12 hours.

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