I'm stuck big time.I am wiring alow voltage icon fan but it seems to work only when wired without the timer and humistat module.My preferred option is for the fan to continue running when I switch the shower light off.I have 2 live wires(1 permanent live and 1 switched live for the timer) running to the transformer and neutral.I have tested the power reaching the fan ,all seems to be in good working order.I have protected the fan with an fcu using a 3 amp fuse.I have read about a 3 pole isolator switch,I think it should work irrespective or may be not.I have changed the module twice but still it would not work.Can't contact Icon until tomorrow,in the meantime can anyone help please.