As summer approaches and heating oil heads ever upwards in price, I guess I better do something about my immersion heater...
Last year, it overheated, melted the plastic cap and eventually the insulation on the cables and tripped the RCD. I replaced the thermostat with one with an overheat trip, replaced the supply cabling, and "bodged" a new cap, but it has overheated again a couple of times since then. Since it was winter and the central heating was on, I switched the damn thing off and forgot about it.
So, any suggestions as to why it's overheating? I suspect the connections to the heating element are not that good, so I guess I need to get a proper crimper and make decent connections to the element. Presumably using some kind of heat resistant cable? Also, where can I get a new cap? The one I made from 4" soil pipe and PCB is not exactly a thing of beauty.