Hi guys, I know there have been a lot of AC related posts and I've read them all. So please bear with me.
The system was empty from the beginning. I used a vacuum pump and it was able to hold -30psi for 2 hours.
I tried filling it with refrigerant on the low side but it went to 40 psi (at 29 degrees C) after 3 seconds and it looked like the system would not take anymore refrigerant. I tried the AC and the compressor was running, but still no cold air.
My guess is that the expansion valve is stuck?