I'm with Variable on that one, I had someone the other day tell me they went on the internet and figured out there problem, but they couldn't find anyone that would sell them a compressor. So they called me to BUY a 5 ton compressor, I said we don't sell them but I would give him a good deal on me replacing one if needed. I said I would have to check it out first to make sure we get the right size and to be sure it was the compressor before I bought one, he said you don't keep one on your truck? reluctantly he said ok, found the wires burned at the compressor, it was a 3 ton not a 5 ton repaired the wires and replaced the contactor, then he asked if I would put in a 5 ton compressor(not condenser) in so it would run colder. He learned about enough to get himself in trouble and that's all.