Lexus UX AC compressor shuts off

I had a similar problem with my UX. When the A/C stopped working, I dove deep into the system's schematics. Have you checked the voltage across the pressure switch when the A/C is engaged? Also, do you hear the compressor clutch engaging at all? It might also be worth checking the high-pressure and low-pressure sides of the A/C system to make sure the pressure readings are within spec, as that can point to a refrigerant leak.

Thanks for the detailed reply! I haven't checked the voltage across the pressure switch yet. Where exactly is that located? And, no, I don't hear the compressor clutch engaging at all. Any advice on how to diagnose if that's the issue?

The pressure switch is usually located on one of the A/C lines, often near the condenser. Since you don't hear the clutch engaging, it might be undervoltage. In my case, it was an electrical issue causing undervoltage, which prevented the A/C compressor from kicking on. Honestly, given the complexity, you're probably best off taking it to a workshop to get properly diagnosed. They have the right equipment to test everything thoroughly.

Appreciate the insight! Turns out it was indeed undervoltage. Took it to the shop, and they confirmed the issue. Total repair cost was 240€. Thanks again for pointing me in the right direction!