Chris came out on Sunday evening and had a very positive attitude towards his job and my concerns. Chris answered my questions and was very informative about what he needed to do and what was expected from the readings he got. Chris checked every possible avenue that could be creating the issue, in my case, it was a loud compressor noise. The conclusion was that my system was charged correctly, an electrical surge might be the issue. all readings pointed in that direction. Chris, thank you for your honesty. I recommend Chris and Air National for any A/C issues, they give you honest work.