Boxer AC compressor shuts off

Interesting issue. I have a Peugeot Boxer as well, and I had something similar happen last summer. It felt like the A/C was acting like a light switch – either full blast or nothing. Did you check for anything obvious, like the belt tensioner? A loose belt can cause undervoltage, which messes with the A/C compressor. It’s like a chain reaction; one small thing messes everything else up. How old is your belt?

Good point about the belt tensioner. I'll give that a look-see. When yours had the issue, was it also throwing an error code? And did your A/C just cut out completely, or was it more of a gradual decline in cooling? And where exactly did you find the belt tensioner, so that I can check myself.

Yes, there was an error code present. The A/C cut out completely and suddenly, just like someone flicked a switch. I'd suggest getting a workshop to check it out. It could also be something like a refrigerant leak in the HVAC system, which is harder to diagnose yourself without the right equipment.

Thanks for the insight! I checked the belt, and you were spot on; the tensioner was shot. Took it to the workshop, and they confirmed undervoltage caused by the faulty tensioner. Repair, including a new tensioner and A/C check, came to around 240€. Appreciate the help!