2nd Gen Non-Engine/Transmission A.c.

[Bob Hart]

mY AC WORKS BUT WILL ONLY COME OUT BY THE TOP OF THE DASH . NO MATTER WERE THE SWITH IS TURNED TO THAT IS THE ONLY PLACE AIR WILL COME OUT . ANY HELP.

 

[grtescpa]

Originally posted by BobHart

mY AC WORKS BUT WILL ONLY COME OUT BY THE TOP OF THE DASH . NO MATTER WERE THE SWITH IS TURNED TO THAT IS THE ONLY PLACE AIR WILL COME OUT . ANY HELP.

What year is your truck??? Sounds like you lost the vacuum line to the control or the valve is broken. The whole mess works off the vac pump.

 

[Bob Hart]

it is a 1998 were is the vac line located?

 

[grtescpa]

Originally posted by BobHart

it is a 1998 were is the vac line located?

They change these trucks so much from year to year. I don't know on the 98. Only my 97. Check uder the dash and see if you can find the hose. It should be near the airbox where the heater core is. You might also have a frozen air box flapper or bad vac diaphram which controls the flapper. You might have some leaves of maybe something got into the air intake and jammed the control.

I once had a field mouse make a nest in mine and clogged the whole thing. what a job that was to fix. Good luck finding the problem.

 

[CumminsPuller]

I find that while I am under the hood attempting to break (fix) things that I catch one of the vac lines with a wrench or screwdirver and pull it out of its connection. They slide out so easy you dont even no you did it until you try and operate the AC/ vent controls... ... ... . My brother-in-laws 96' was notorious for this. The rubber connectors and t-connectors were just worn out and the vibrations would just rattle them apart. Most common connections that I have found that get disconnected are those that run left to right just above the valve cover and just below the rubber seal for the hood towards the firewall ... ... . Hope that was a good description. Good luck and hope you find the problem.



Jason

 

[Bob Hart]

Thank you for the info. As soon as I get my truck back I will see if I can find the vac line .