Originally Posted by nealtw
I hope you tried unscrewing the black knob. Or giving it a quater turn or something. See if you can figure out everything it says on it, make model year anything how old might it be.
Thanks for your help! I had tried it but it seemed quite tight so I wasn't prepared to use much force (seeing as the whole thing is made if some type of ceramic) but after speaking to another electrician he had seen them before, it turned out you're right. It was heaps tight but after I got it moving it unscrewed fine..
Only bad thing is the fuse was fine, thermostat is next stop which is all that's left. I really need to get a working multimeter, could save a lot of time