My in-laws have an interesting problem with their A/C in their 2004 Crown Victoria… The air comes out of the defroster vents most of the time no matter what setting is selected on the A/C control panel. Then when they go over a bump in the road sometimes it will redirect the air and it will come out of the front vents for a while which is desired and what is selected on the A/C control panel. Then after a short time it will revert back to forcing the air out of the defroster vents. What do I need to look for? How to fix? Thank you.
Brian Collins (firstname.lastname@example.org)