[hhu168]

Thank you for the reply.

I only have a gauge that would attach to the low side service port so I checked pressure on the low side only. When the AC is working, the clutch cycles off at about 25 psi and cycles on at about 45 psi. I think that is normal from what I gathered from tripletdaddy's excellent writeup.

I also checked the low side pressure when it's very hot (>95 F) and the system not working, the pressure is 125 psi. Is this too high? Does that mean I overcharged the system? I did put in some R134 (less than a can) a few weeks ago, when I knew even less about AC. But to the best of my knowledge, the symptoms of the system have not changed, although I do believe the air is colder after the charge when it works.

I jumped the one on the top of the accumulator/drier I believe, in front of the the pressure tank. Are there two pressure switches? I thought there were two switches, one called clutch cycle switch on the accumulator/drier, another low pressure cutoff switch on the compressor?

Again, thank you for the reply. I have been reading the forums here and they are very informative.