Question

the heating element in my Truma boiler[elec supply] is not working and I suspect it has given up, I have checked the power supply and fuses [ok] how difficult is it to change and do I need any special tools for a Baily Ranger 360/2 year 2000. many thanks

Answer

Changing the element is not difficult if access is easy and is achieved by undoing two nuts. You will need a small socket set with a M7 socket. The element comes with two nuts and it is very easy to drop these nuts behind the casing whilst trying to fit to the studs. A piece of blue-tac in the socket will help.
The cable supplied with the element has no terminal block and is simply bared wires. You may need to install junction box (20 amp) to connect the new element to the existing supply cable.