If you do not have the equipment to do it yourself, take it to a shop.this was the best place I could think to post this. Anyone use those do it yourself AC cans with the gauge on them? If so, would you recommend it or pay a shop? Also, if you had good experience, which brand did you use?
I have 1995 S-10 and have the same exact problem as you. the pressure cycling switch was changed in the past because it stopped working. but now it still goes on and off alot when the a/c is on so i assume its a little low. but i did notice that its all dirty and wet where the pressure cycling switch is mounted, so i think its leaking there. i never put a new o-ring there. i got the switch at autozone for $15 and it didnt have a new ring. should i change the o-ring and then top off the A/C? or put a genuine GM cycling swithc first? also Wal-mart now sells a/c refill cans with a gauge and trigger switch on it so it can be saved and used later and it better than the old tap and use once design. anyone use this wal mart type yet? also what do you mean by "outside temperature" ? thanksI tried kit from Kragen's this afternoon (mac 134).
The compressor was cycling off and on whenever the ac was turned on.
Hooked up the gauge and it shows the system cycling from 55 down to about 10.
Added the contents of the can and the system stopped cycling and the compressor stayed on. The gauge registered in the blue area which was 35-40 which was correct for the outside temperature.
Got in the truck and I will be damned if it wasn't cold.
For $25.00 I could not beat it. It would have cost me a minimum of $65.00 for a tech to tell me that plus the 134a. That was on my 1997 S10.