I recently switched the relay for the fuel shutoff soleniod, upon doing so I disconnected the Heater Relay. I put everything back together and now I only get the air to come out of the defrost vents. I have tried every setting, hot-cold, but it only comes out on defrost. I checked the relay again on the heater, it seemed fine, no bent prongs, or loose wires coming from the wire loom. The only thing that I can think of, is in a prior post I read some said that it is vacuum powered and that one of the lines may have come loose???

Any thoughts.



Thanks,

 

That's definitely a possiblity. I had a line melt after it came loose from the ties and fell down on the turbo. defrost is all I got after losing vacuum

 

Mine went to defrost some time ago and I found a vacume line off at the firewall on the drivers side. I was playing with the stink rubber thing that keeps the engine are out of the intake vent for the AC.

Dave

 

I had to replace the defrost actuator arm when mine did the same thing.

 

Mine use to do the same thing ended up being a vacumm hose cracked

 

I have a vacuum line just above the AFC housing that I knock off every time I do anything in the AFC area. I go for a test drive and stop at the first stop sign and hook it back up and all is ok again. I would start by looking for any loose vacuum lines. Good luck and lets us know what you find.

 

Yep, turned out the vacuum line was off the pump near the front of the engine block,, Working good now.