AC high pressure cut-off won't work

AC low pressure works fine. When I add AC-fluid the compressor turns on and the fans start blowing. The problem is that the pressure gets way too high and the AC compressor never stops until I turn the AC off.

I think the problem is in 2-mode pressure valve that has 3 wires. It's attached to AC-pipe on the left side of the engine compartment. The valve is near the firewall.

Where can I buy this part from the internet? I haven't found it yet.

Everything is working now. I found out that the pressure valve only monitors low pressure and the high pressure is dealt with the fans. The problem was solved with the right amount of AC fluid (1.36kg/3lbs, including rear unit).