whenever i switch to ac or max ac the compressor kicks off, but when I have the vent on it is on. Any ideas?

 

Did you check an see if the compresser is really coming on, with it switched to vent ?

 

What do you mean? When the air control is in the off position the compressor is not on, but when i put it to vent itturns on, but if i switch to ac or max ac it turns off.

 

you got a bad vacumm switch box, remove control panel , look behing it you will find a plastic looking module it will vacumm hoses running to it , start cheking to see if any of the hoses are broken or cracked, Chance's are its failed internal ( has a crack inside valve allowing vacumm to bleed thru ) best bet if your trying to fix it your self is to try one from a junkyard. Tell the guy if it works you will by it . Most of them will work with you on this , plug the new one in an see what it does. Unless you got a buddy that works at a Ford Dealership an he can get a Electric, Vacumm,book, they call it something like a { EVM } your kinda stuck trying to figure it out. try checking all the , flap doors an such making sure they work ok. an I think there several vacumm motors as well that hook to the flap doors to open an close them