well the exp valve will cause cooling probs because it will get cloged up with debris. there is a low side switch that will open under low press and cut power to the ac compessor. sniffers work but dye is great. when looking for the dye after it goes down again be sure to look at the evaperator drain tube.

 

I was told it could be a bad thermo sensor.

 

close...the sniffer picked up right out of the vents. My bud a said it is probably the evap core cause if it was somewhere else in the system especially the high side it would have leaked down really fast (as apposed to slowly)and also not leak from the the vents as such.

Now........