I hope this info helps anyone whose interior fan has stopped working on some/all of the speeds.

On my Fabia, the first two speeds failed over a period of a year.

In my case the cause of the problem was the Heater Resistor (part

Got a part number?

funnily enough, mine is going in to get replaced under warranty on wednesday, as its only working on no4 setting.

Likely there is an a lot cheaper solution. That heater resistor consists of the resistors that limit the power for all fan settings but the highest one and a temperature-sensitive fuse. If the resistors get too hot, that fuse breaks. I bought just that fuse a couple of years ago for my dads Audi 80 and soldered it in myself. I suspect, maplin or the likes do sell that fuse. Bought it in a german electronics shop back then. As a not-so-safe short-term solution, just short out the fuse with some strong wire.

Michael

Got a part number?

sorry , but no.

I left that bit to the garage to sort out