Cheers for that mate, will have a look. Forgot to mention that before i replaced the fusebox the 3 heater speeds worked in a different order,

At speed setting 1 the heaters would run at number 2 speed, At number 2 speed the heaters would run at number 1 speed, number 3 speed was ok heaters on full blast.

Would this indicate a faulty switch perhaps? as i cant see why fitting a new fusebox would cause the heaters to stop working..