So im tryin to get my A/C to work. It came with the car jsut wasnt working. Now im tryin to get it to work. The problem im havin is that after vacuuming the system and filling with R134 It wont cycle the R134. Low side will show a vacuum and the high side with stay at like 90. The air will be blowing warm and not cold. I just replaced the dryer. I ordered the doo hiky thing that changed the liquied to a gas but it was the wrong one. I blew some air into it and it passed it through. Same with the condensor. Idk what to do next. Is there a way to test the Pump?

 

I'm no expert wit A/C but I just finished bring my system back to life.
(compressor and couple of lines)

When initially charging mine, it would not cycle until I had enough stuff in the system.
The guage on the low side read 20 before it would kick on. Not sure about the vacuum part.
At idle mine always should preasure.

I think you should be able to test the clutch to see if its getting voltage. You can also by pass the preasure switch to see if it ingages.

 

I have the clutch jumped already. It engages just fine. I just seems like the R134 isnt gettin through the whole system. If someone knows how to test the compressor to make sure its doin what it needs to be doin that would be a great help.

 

Oh, I missed that. then how about looking in the site window on the dryer to see if you see bubbles. I guess it's supposed to be no bubbles and clear when fully charged. While charging mine I noted it went from clear (nothing in it) to bubbles then clear again when fully charged.

Also, maybe take a look at the mixing valve under tha dash. this is controlled by the heat / cool lever. maybe this is not moving to the off position and allowing warm air into the vents.

 

Its not the mixin valve. When we were doin this it was like 80 and 60% humidity. I think it may be the compressor but idk. It does pump. That much i know. I just dont know if its suckin enough or what.