hello!!! im new to this club....my name is reed and i own a 2000 mustang,
when im driving it, lets say up a hill the air all of a sudden switchs to the defrost....and it takes about 2-3 mins... to switch back to the vents???????
Check the vacuum hoses running along the firewall to the vacuum tree which should be on the driver side of the engine bay near the firewall. Sounds like you may have a leak.
thanks guys.....another problem i have too is with the seat belt. i replaced the seat belt due to the other one being cut...and now since i put it in the alarm goes off thinking that i dont have the belt on....so for about a month i've been driving around with that stupid noise going off and the light on the dash goes off...with the seat belt icon.....is there a reset that im soupsed to do or what cuz its anoying the hell out of me.......
Wow that sounds really familiar. I just had the same problem with mine except mine would come out of the defrost all the time when I tried to use the air. There was a big vacuum leak from one of the hoses but I got it repaired and it has been perfect ever since. I'm not sure how you would find out where the leak is by yourself but I took it to a friend who owns a mechanic shop and it didn't cost that much to fix. Good luck.
Wow that sounds really familiar. I just had the same problem with mine except mine would come out of the defrost all the time when I tried to use the air. There was a big vacuum leak from one of the hoses but I got it repaired and it has been perfect ever since. I'm not sure how you would find out where the leak is by yourself but I took it to a friend who owns a mechanic shop and it didn't cost that much to fix. Good luck.