Hi there
This could be many things ----this is a sign of low freon in the system ,,, or if they replaced the compressor due to it seized up ,,, there could be clogged lines ----what is the history of the a/c system ---like what happen first ,,,what parts were replaced ??? we can go back and fourth on this page
Chris
When a compressor seizes up metal is pumped through the hole a/c system ---and the system has to be flushed out ,to get all the stuff out --sometimes flushing will not get all of it out ----like the rear a/c , it has its own little filter mounted in the rear a/c lines ,,a lot of techs forget or do not know about this filter ,,,it can get clogged up easily ----and on the front a/c the condensor ( the thing in front of the radiator) it can get clogged up too and will not flush out -----I think this is your problem ---and maybe if you bring it to another dealer and sit down with the shop manager and tell them the history of your car ,,,they can handle it ---and then you can get your money back from the other repairs
Ford Mechanic
ASE Master -Ford senior master-20 years experience