I checked the low pressure valve to see if it was the refrigeration and it said 100 psi overcharged. I then let some out so the reading would be at 45. Still didn't work. I then let the rest out and recharged it back to 50 psi. Still didn't work. Both fans are running. I can hear the compressor turn on when I turn a/c on. What could be wrong?

 

I forgot to mention that when I take off the low pressure port cap I can hear a hissing coming out.

 

Can anyone help?

 

With the engine running, what are the current high side/low side pressures?

 

Does the magnetic clutch engauge for a fact? You have to visually check it and see if it's engaged or not u can't base it on just hearing it. I've worked on a few TL's that sound like the clutch engaged when a/c button was pressed but the clutch really never engaged. If u find it not engaging with a/c turned on disconnect the single wire connector to the stator that's connected to the fan shroud by alternator and check for 12V when a/c turned on and 0 volts when turned off. If there is 12V then u need a compressor/clutch/stator. If there isn't 12 volts to it then have a mechanic do a evac and charge and replace your valves inside of the service ports. And then recheck for 12 volts. If 12v is still not there then something is causing it to shut down and if the ECM/PCM sees a problem electracally in the HVAC system then it will shut the clutch/compressor down untill it's fixed

 

check the cable for the heater core shut of valve, it could be broken so the heater core is getting hot coolant which heats up the air coming in your car
Also run your car for couple mins with the ac on, put your hand on the low pressure ac line and check if it's cold