A/c repair i want to learn?

Question:where do i go on the internet to be pro or to know the basics about a/c

Answers:
a/c work involves two separate sections one is mechanical and the other is electrical. low cooling output is mechanical no operation is electrical usually. a/c systems without heating is simple if heating is included in the unit then things get complicated at a alarming rate. i have a a/c repair guide in .pdf format. I repair a/c for a living and still need to look for some wiring diagrams. ir u would like a copy let me know.