RAI
Well-known member
This is the third time in as many years that the immersion heater in my boat's calorifier has developed an internal short circuit. Each time it fails, my multimeter shows the resistance to earth as a few megohms instead of open circuit.
Could it be that there is some form of corrosion that eats a tiny hole in the copper pipe which lets a tiny bit of water in to create the short circuit sufficient to trip the circuit breakers?
Any other possible causes? Any solutions? These little heater elements are silly expensive and a drag to change.
Could it be that there is some form of corrosion that eats a tiny hole in the copper pipe which lets a tiny bit of water in to create the short circuit sufficient to trip the circuit breakers?
Any other possible causes? Any solutions? These little heater elements are silly expensive and a drag to change.