A/C issue with defrost mode
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,570
Likes: 0
From: Welcome to the SEC...#GMFG !!!
Cruise-In I Veteran
National Champs Gators 4 St. Jude '09
A/C issue with defrost mode
My A/C "leaks" into defrost mode even when I do not select it....and it then condenses outside on my windshield and I lose visibility. Problem started about 3 months ago....unprovoked. It happens whether there is high humidity outside or not.
Have heard of the battery disconnect possibility to solve the problem when it is just A/C related to reset an actuator. Was not sure if anyone had this issue and tried to solve in a similar manner.
Thanks in advance.
Have heard of the battery disconnect possibility to solve the problem when it is just A/C related to reset an actuator. Was not sure if anyone had this issue and tried to solve in a similar manner.
Thanks in advance.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
All my info is at home but I remember that if you lose vacuum then the system diverts to defrost mode of air flow. Have you done anything to affect the vacuum line from the rear of the manifold?
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Mine does that too, but it's not bad enough I worry about it. I just get a little moisture spot bottom center of the windshield. The different vents get selected with the controller so I suspect there is a gasket on the door that is damaged letting it leak. It'd likely require pulling the whole dash apart to get to it.
Do verify that your controller switches the air flow between the different vents.
Do verify that your controller switches the air flow between the different vents.
