Twingo rear window heating issue

Interesting. I have a Twingo too. Did you notice if your battery was draining faster than usual before this happened? If the voltage drops too low, the car might start shutting down non-essential systems to conserve power. It's a long shot, but worth checking out.

That's a good point. I haven't explicitly monitored the battery drain, but now that you mention it, the car struggled slightly more than usual to start a couple of times recently. Is it possible that a weak battery could throw error codes related to the heating elements?

Absolutely, it's possible! Similar thing happened to me, including error codes. I ignored it for too long and ended up needing a new battery AND paying to get the heating system reset. Best to get the battery checked professionally before more problems arise.

Thanks for the insight! I took your advice and brought it to a workshop. Turns out, the battery was indeed the culprit. A new battery and a system reset cost me 290€. Problem solved!