Reply to Joe Barcus's Post: Thanks it helps a lot, I'll see how it turns out and yes it does lock up but I've been told that the required fluids have been added. I'll certainly let you know - I've heard something about a high side blockage which i have no idea what it means. Gage readings are at 45 on the low and 225 on the high. Dual a/c, expansion valve in the rear that's been replaced, front evap. has been replaced, orifice replaced, dryer replaced, comp. replaced, 7 1/2 oz. pag oil into the whole system after flushing, new o-rings and seals, holds 30# vacuum for over 35 minutes. B4 if was delivered to me it had run for 2+ hours cold air. Only concern i've been told now is that about a high side blockage and they can't locate a dual core condensor. Whew, hope that all makes sense - wrote it down word for word from a phone call - because I don't understand much of it. Thanks again for your help!!