Question about 2003 Pontiac Grand Am
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?
There are multiple issues that prevent heat from coming through the vent. You'll need to see a mechanic. ----------------------------------------------------------------------------
Posted on Jan 24, 2013
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Posted on Jan 02, 2017
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
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
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
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
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