I had my A/C drained and charged about a month ago. It does not seem to be as cold when ideling as when i am moving. i read on a corvette forum that if there is too much pressure, as idle it can blow hot. the other issue is twice now at a short stop it is almost like the A/C stops. the fan keeps going but it is like the compressor stops. the only way i can tell is by the smell (got that moisture smell) but only happens for a few seconds, then it is ok again.