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Heating Element
Resistive coil that converts electricity into heat inside the boiler — usually a sheathed nichrome element bolted to the boiler flange.
Category: Boilers & Heating
The electric coil inside a boiler that heats the water. Usually a sealed metal rod (sheathed element) immersed directly in the boiler water.
Why it matters — The heating element is the single most expensive boiler component to fail. Failure usually traces back to one of two causes: scale buildup (insulates the element, causing it to overheat and burn out) or limescale-induced corrosion of the seal.
Good to know
- A scaled-up element draws more current to reach the same temperature — and runs hotter at the surface, which speeds its own failure.
- Good water filtration is the single biggest factor in heating element longevity. A filtered home machine can run 15–20 years on the original element.