Ok I have a 2001 Ford f250 4x4 7.3. Started out my a/c would stop blowing out of my ventsand blow thru defroster when I put truck in 4 wheel drive. Now I have no a/c unless I mess with a round silver part with a ARM, located under glove box next to heater core. What's the name of this part or what's the part number. Any help would ne greatly appreciative.

 

It may be part of your ESOF system. Not positive, but here's a bump for ya.

 

That's more help than I got from my local Ford dealer, they wouldn't talk to me unless I paid for a diagnostic. Thanks bud ill keep researching

 

Not sure on the silver part, but there is a blend door that directs flow. Can you get anything heat or AC to go anywhere but defrost? When these trucks have a vacuum leak, they default to defrost. Good luck.

 

If I remember corectly that is usually a vacuum leak at your 4x4 hub actuator.

 

X2 on Terry's reply

 

Does it have a vacuum line coming off the bottom. I just took a look at mine. That might be something associated with actuating the blend door but not sure. Maybe post a pic and someone can help identify it. If you have a vacuum leak it will default to defrost. You might try blocking off the vacuum lines going to the hubs one at a time.

 

When I manually press the ARM up on this round silver part my a/c works

 

Check that your vac lines are attached at your hubs.

 

Mechanic buddy of mine traced the leak to the round silver part behind glove box

 

So far its been a nightmare

 

By the way, welcome to FTE. What area are you from?

 

Thank you I'm from marble falls Texas

 

Man vacuum leaks are a nightmare, once again Ford would not talk to me unless I pay for diagnostic

 

aanybody know of a good website with pics on Ford parts?