I'm wondering if anyone can help me with a slightly vague question about Immersion Heaters. The information I have is secondhand and concerns my mother's ageing Immersion Heater. Seemingly it has run without a glitch for about 25 years but earlier this year failed. At this time both the heating element and thermostat were replaced. A month or so later, however, the thermostat had apparently failed again and was once again replaced. A couple of months later the system had failed again and this time a wire supplying the unit had 'burnt out' and was trimmed and reconnected. This was about 6 weeks ago and now today the system has failed once again.
I have no specific knowledge of this kind of thing myself but it does seem odd that the Immersion Heater has now failed four times in almost as many months. Could there be some underlying cause for all these repeated failures which hasn't been detected? Would it be better getting rid of the whole thing and getting a new one? Would really appreciate any help or suggestions from those with more knowledge of such things.