my a/c is comming out the defrost vents only. No matter what I set it on defrost vents only. It's fogg'n up the windows

 

Check the vacuum line that goes to the damper assy. It should be located near where the heater vent at center of dash floor. Might have a loose or broken line.

Good luck!

Gary

 

After the above advice is exhausted, pull the **** off and make sure it is not broke and stripped out and is just spinning as mine was. Goodluck,,Rick

 

Defrost is the "fail safe" setting if you lose vacuum to the mode actuator/damper. I'd start by checking the vacuum system.

Rusty

 

I have checked out all the vacume connections and found no problems there. I did notice under the dash, what looked like a wiring block but turned out to be a vacume block but all connections looked fine here as well. Any other Ideas? Could it be behind the dash somewhere requiring dissasembly?

 

Is your cruise and 4 wheel drive working ok?

 

yes

 

Possibly a hole or tear in the diaphragm of the vacuum actuator?

Rusty

 

My 97 is the same way there is an actuator under the dash a lil bit to the right of the throttle. Looks like a gasser fuel filter but it has a diaphram in it. If you start your truck, set the **** to vents, lie on your back and reach under there and help the diaphram pull the lever its attached to you will more then likely get your vents back. The diaphrams in them get weak after time I guess or get a pin hole in them that keeps them from pulling the selection doors all the way or at all.

Here is a post I made on TDR about it.

http://www.turbodieselregister.com/f...hreadid=101795


P/N is 04720279. This is the Dodge number


Charlie

 

This is your problem. The actuator that goes out is just above the throttle pedal. Let me guess,,,,,when you switch to the dash vents, you hear a hissing noise, but nothing happens? Yeah, its the actuator.

I think the one I replaced a few years ago was like 30 bucks. What a rip off.