I have a factory A/C system that I'm trying to get working. I pulled a vacuum on the system and it tested good with no leaks. I left it overnight and it the vacuum gauge didn't move at all so I decided to charge it up. I put in an oil charge first, and then added a can of refrigerant. The compressor started to make noise, felt really hot, and seemed to bog down the idle so I cut the A/C off and am now looking here for ideas about what might be going on with the system and what I should do to get it fixed and working right without noises or problems?