I have an old primatic emmersion heater ,less said about that the better! but anyway my thermostat kept tripping out so I kept resetting it and the element would work for a time but then the thermo would trip out again. I bought a new thermostat but have the same problem,do you think the element is on the way out,I hope its not that as The tank is buckled from the last time ( 500 year old primatic ,see earlier posts!!) so dont think it would handle another removal and they are so hard to come by ( I have been told! Any thoughts please gents and thanks for reading once more! cheers!