I'm Charles in Dallas, TX, and I need to figure out what is up with my A/C. When I put freeon in the low side, I can here it spraying out, but I can't see it. Somebody told me that it was the evaporator core. They said it was probably a hose lose.Are they right, and how do I get to the evaporator core? Please help me out, If you know anything about dallas, tx, then you know it gets hot.