Hi, been following this thread for a while, great info. My problem was heater fan working on 4 but not 1,2,3 settings. Got a new resistor pack and bingo just as described...worked great. BUT 3 weeks later its stopped working again (still works on 4) . I've read that it could be moisture in the duct (due to the pollen filter not being fitted properly??) or the wiring loom replacement?

Anyone got any suggestions on my next move?

Thanks