2019 Nissan Frontier AC troubleshooting (Video link attached)

[JohnHere]

I have a sneaking suspicion that the system's high pressure problems might be rooted in a defective block-style TXV and/or the condenser.

If you replace the TXV, check to see whether an OE part is available.

Also replace the Receiver/Dryer, and do that last, every time you open the system to the atmosphere.

I don't think the fixed-displacement compressor is bad because it seems to be building pressure just fine.