Quick update - replaced with a new resistor and everything now seems to be working correctly. The most difficult part is getting in but if you remove the bottom bit of the glove box it makes it easier. The wire connectors are very tight so a bit of persistence is required. The part number from the o...

I have the same issue. The fan works at full speed but if you turn it down, it stops after a few minutes and you need to restart the car to get it working again at full speed. I have purchased a second-hand resistor on EBAY for £30.00 Hopefully this is the correct one as I haven't fitted it yet but ...