My ac now only blows out the defroster

misfitJason · #1 04-10-2012, 06:41 PM

Well I just replaced my accumulator and it worked before that. The ac blows at all speeds and I just recharged the system thinking that low pressure was the cause? Nope. Is the plenum door system my problem. Well I guess it could be. Is the system vacuum operated or cable operated. Any help woul be appreciated. Oh yeah it is a 97 4.0 single cab

FireRanger · #2 04-10-2012, 06:44 PM

You recharged the AC to make it change where the air blows??

The controls for which vents the air flows out of is vacuum operated. The vacuum line is either broken or disconnected. Follow the line from end to end:

- Manifold vacuum port on the driver side of the engine
- Wraps around the back of the engine and goes under the air filter box
- There is a vacuum reservoir ball under the air filter box it connects to
- Another line out of the reservoir into the cab behind the glove box
- Into the HVAC control panel

misfitJason · #3 04-10-2012, 06:48 PM

Haha. No sorry I had a leak in the system and my accumulator was partially rotted under the insulation. So I decharged the system and replaced the accumulator thinking that that fixed the leak.

misfitJason · #4 04-18-2012, 07:14 PM

Quote:

Originally Posted by FireRanger

You recharged the AC to make it change where the air blows??

The controls for which vents the air flows out of is vacuum operated. The vacuum line is either broken or disconnected. Follow the line from end to end:

- Manifold vacuum port on the driver side of the engine
- Wraps around the back of the engine and goes under the air filter box
- There is a vacuum reservoir ball under the air filter box it connects to
- Another line out of the reservoir into the cab behind the glove box
- Into the HVAC control panel

Dead on right. Vacuum reservoir tube was broken