Thanks for the advice. I had my system evacuated and pressure tested at B&M Exhaust in Owasso on Friday afternoon. And she tested fine. The oil level is a tad low.(Should be 1/2" to 3/4" deep in compressor) I had my father-in-law show me how to recharge it with 3 cans of R12 replacement. It works, but she's not super cold. It blows fairly cool air, but not colddddd. I figure that I need another 6oz can of Enviro-Safe R12 replacement. That's the brand we used, but I'm having trouble finding a local distributor/resaler of Enviro-Safe and I'm not sure if it's safe to mix different brands?