I had a technician/customer inspect my AC units last fall, and he said there is not much that ever happens to the commercial compressors, helped me change my filters, etc. About a week ago, he came in and said, "You haven't been running your air conditioning, huh?"
I had been, but shortly after he came in, they started going buggy. I have two units for 3200 square feet. Now, neither will go on. I'm just wondering if there was something he could have done that would allow them to run for a while, then quit on me! One unit triggers the 220 breaker after trying to go on. The other seems like it's just not getting triggered by the thermostat. Any suggestions?

Dozens of things he could have done. Why did he "come in" was he called,