Hi I have read all the posts on this thread and have followed the various solutions/ideas hoping that this time it will work.........Basically I have a similar problem as most my heater/blower only works on setting 4. The bottom blue relay clicks as the dial is turned from off to 1 but nothing happens until the dial is at position 4, when the brown top relay clicks and the heater blows full blast. I have changed both relays, put in another resisitor pack, fitted a new 240c fuse (69p from Maplins) to the original resistor pack eventhough it tested okay. I have even removed the heater unit and tested the fan spins freely but I still have off or full, nothing in between.
Does anyone have any other ideas????? Much appreciated.