A/C is STILL blowing out warm, after brand new parts and 2 full "OK" diagnostics

Hello, and THANK YOU for your response! :-) Yes it is still currently at the second A/C mechanics shop, as he cited for me to leave it with him a couple more days, as he is very perplexed by it actually too. I do not have the answers to some of your questions unfortunately, as the car is not currently with me... But here is some new info we gained from this recent A/C mechanic..... 1. He showed me and ALL the new r134-a is SILL at optimal pressure in the new compressor, so it did not leak out anywhere. 2. He did run a dye test also and no leaks were detected whatsoever anywhere either. 3. Yes the condesor fan comes on fine and the A/C also activates with the push of its button and runs at normal RPMs that it should he stated. He seems to think that it is the "expansion valve" I believe it was called? Although he stated it is a huge proccess to get to it and a lot of components to take out and everything in order to do so.

Find out BEFORE he does the expansion valve , if the compressor is staying on constantly , or if it is cycling on and off as it should. Years ago (I'm at a Honda dealership) , I ran across a few that had faulty PCMs (the computer is ultimately what 'commands' the compressor clutch on) , but that would not quite fit all of your description. HOWEVER , a faulty heater control valve (broken internally) WILL cause it not to cool down because the air goes through a HOT heater core , then an evaporator , seen that many times and that may be closer to the total description. Does the low pressure line get cold , but still blows warm air? Do the heater hoses to and from the core BOTH get equally hot even with the temp set on coldest setting? --IF YES , that's a problem.