I have an Octavia mk3 2015 with the 1.2 liter petrol engine, and it has recently started making some strange noises. I suspected it had something to do with the AC system since the noise stops when I shut it off, but i also noticed that when the noise is happening and AC running the internal light also flicker very slighlty, which made me think the problem might be with the alternator, its pulley or the belt. I've attached a video, if anyone has expirenced this and can give me some info that would be very appreciated :)
WhatsApp Video 2026-06-24 at 23.30.51.mp4