A/C Low Pressure Sensor/Switch...etc?

[MitchyMitch]

I have a 2003 Corolla and the a/c is blowing cold some of the time and hot at other times. Took it to my mechanic who said that it is full of freon and believes the problem to be electrical. He stated that it was over his head and recommended an expert to take a look at it. He guessed that the problem could possibly be as simple as a faulty Low Pressure Switch or a bad Clutch Relay Fuse. I dunno, myself...but if it's one of those, then maybe I can replace those and solve the problem...and save a ton of money while I'm at it. I know where the Clutch Relay is, but WHERE is the Low Pressure Switch located on the compressor? Does anyone have a diagram that I can look over? Thanks for your help!

Mitch

[Vindicator]

Could be a faulty switch or could be a sticky expansion valve. First thing is to get a reading on both the hi and lo sides with the engine running. The corolla had a problem with the intermittent MG/CLT relay going out. Try switchin that with the horn relay and see if the problem persists...