Front center AC vents, no air flow

MTBPATH · Sep 7th, 2006, 01:26 PM

Here is another one of those weird AC vents experience.
AC, all front vents and modes working fine. On the road around evening time and the 2 center front AC vents, no air flow. I started to play with the modes and anything to get the 2 center vents to blow air. Nothing. I thought maybe something was stuck that would cause blockage. The side vents work fine, it was just the 2 center vents.
I called the dealer to ask for advise over the phone, of course their answer is to bring it in.
9 hours later, which was early morning, the vents worked. Air flow was fine. I played with all the modes to make sure all vents were blowing.
I will monitor to see if it acts up again.
Where would I start looking to see if there is blockage to the vents in the engine bay area?
Has anyone had this happen to them?
Thanks.

boogyman · Sep 7th, 2006, 01:56 PM

since they are controlled by vacuum hoses, you would have to check that they aren't splitting or something like that. Or it's the control module giving in. I don't think it's a blockage since it works sometimes but not others.

supraholic · Sep 8th, 2006, 12:36 PM

Pathfinder do not use vaccum to control air mix doors.. there is a motor that moves the lever to change air door position. Get a factory manual, and there is a procedure for diagnosys by pressing the a/c control module buttons in certain manner to start the diagnosys. My 2001 manual has it, but dont know about 2005 though..

boogyman · Sep 9th, 2006, 10:05 AM

My bad, I was thinking about how it worked in my old grand cherokee. I don't have the manual with me to check.