I replaced a top element on an electric water heater ( double element) at the cottage. We use lake water that is pumped up to a holding barrel above the heater then feeds the heater. After replacing the element it took quite a long time ti get water to run through the system to the tap, air pockets I guess. The new element burned after a short while , it may have been due to the air pockets and not much water in the top part of the tank.
Question: this heater has a thermostat for top and bottom element, should it not turn off the element if it gets to hot , either if water is present or not?