Interesting that I come on to query this problem and see someone else suffering a similar fault on their 250! But I thought i'd start a new thread as my problem is different and different car so I assume different solution. My heater blower on my R26 works... mostly. Basically when I first start the car, sometimes the blower won't work at all for the first 2-5 minutes of running. Other times it works fine! When it does kick into life it works perfectly, all speeds work etc. I've done a bit of research, sounds like the resistor pack is the common cause of problems and there are companies offering to fix it for under a tenner: http://www.heaterblowerresistor.co.uk/renaultmeganescenic2heaterresistor.html However I can't see it mentioning my specific problem. i.e. mine works fine but sometimes not for the first few minutes. Anybody else had this - Very strange?!
Mines works fine on settings 1,2 and 3. But not at all on 4. Not had a chance yet to see what the problem is!