I've just come on to this myself, have had no no.1 stage fan for ages, then intermittent 1 and 2 .. then 2 and 3 only, now the lights are all off, the controls don't work and the fan blows like a demon on number 4. No idea where i'm gonna get a new resistor from tho .... can't u just service or clean these things?
Will see if its the switch, from reading the other posts on here i do hop its not. That thing is a pain to change! Had half the dash out last month fitting the radio and ten miles of cable that go with it
