Probably a simple question for you all. My Immersion heater circuit tripped last night. I suspected a faulty element so I removed the thermostat element and turned on the circuit again. The circuit now didn't trip which implied that the fault did not lay somewhere else in the wiring. However, when I replaced the thermostat element with a new one, the circuit tripped again. Is it likely that the whole immersion heater will need replacing or is there something else I could try first?