DS3 Climate Control Failure

I had a similar issue with my DS3. It sounds like a communication problem. Have you checked the cable and plug connections to the climate control unit itself? That's a common point of failure.

Thanks for the quick reply! You mean behind the panel itself? Was it visibly damaged, or just loose? I'm just trying to get a better idea of what I'm looking for before I start ripping the dash apart.

Yes, behind the panel. In my case, the plug was slightly corroded, causing intermittent connection. While you might find a quick fix, given the stored error code and multiple symptoms, I recommend a diagnostic check at a workshop to properly diagnose the issue.

Took your advice and brought it to a workshop. Turns out it was indeed a faulty cable connection to the climate control unit, just as you suspected! Repair cost me 95€, so thanks a bunch for pointing me in the right direction!