Hello, About four months ago, I replaced one of the elements on my water heater (240V / 4500W per element - heater's about 5 or 6 years old). There are two elements on the heater, and the upper element seemed fine so I left it alone. Yesterday, the new element failed. I pulled it out and found a hole blown in the element. This time I replaced both elements and both thermostats. Can someone explain some things to me.
- Why did the new element fail so soon?
- Why are there two thermostats?
- Should the lower thermostat be set at a different temperature than the upper one?
thanks