A/C Clutch not engaging

[Haci]

Hi everyone, so my b8.5's a/c will not work, the heater works but the a/c doesn't blow cold.

These are the errors:
Heater & air conditioning:
00256 - Givers for refrigerant pressure / temperature (G395)
00457 - Control Module for Network (J519)

I've changed the A/C sensor in the front, I've check the 3 wires, 1 which is positive and 2 are negative. I've changed the A/C compressor, but the clutch will not engage. When I checked for electricity from the plug (2), none of them gave me power. I tried to fill up 134a, but the system will not take it. I don't know what else to check, I looked all the fuses also. Any help would be appreciated.

[Audibot]

I believe these a/c compressors do not have clutches. There is a solenoid valve that changes the angle of the swash plate inside, which is what drives the actual compressing motion. Otherwise, it just spins in place with your engine. Have you checked the solenoid valve on the compressor?

Mine just stopped working last year about 4th of July, even though it was holding pressure and nothing seemed to be wrong. Turned out the shaft inside snapped somehow. Replacing the whole unit cured it.

[Haci]

I bought a new aftermarket compressor, the only main difference I saw was there was a black piece of plastic in the compressor like a spring, inside of it where one of the tubes connects to. Other than that the whole compressor itself is new. Can you be more specific on what the valve looks like?

[Haci]

Anyone know what fuses are in the engine bay, including the relays? I haven't checked those

I bought a new aftermarket compressor, the only main difference I saw was there was a black piece of plastic in the compressor like a spring, inside of it where one of the tubes connects to. Other than that the whole compressor itself is new. Can you be more specific on what the valve looks like?