hello, this problem is driving me crazy. i have a 88 f-250hd, 351 motor and the problem is that the defrost blows all the time and i would like to get the ac working again. i have traced the vac lines back to a three way saucer looking thing. and i do not know where the two other vacumm line go. i think that the middle one or center goes to the manifold tree and the back one goes to the box that the condenser goes but this configueation does not work so please help me before i get the .45 after her. oh yea i looked at the diagram on the air filter but i really dont understand it. thank you

 

I really like to help people solve problems, but I get tired of typing the same thing over and over. In this case, this problem has been discussed dozens of times in the past few months. Please use the search function. If you get stuck on a specific problem come on back and ask again.
Thanks Frank

ps you have a vacumn leak.