Hearing a bubbling, gurgling, or boiling sound coming from your water heater is typically caused by heavy calcium and mineral sediment scale accumulating at the bottom of the tank. When the burners or electric elements heat the water, trapped moisture beneath the thick layer of sediment boils furiously, producing bubbling noises. This trapped boiling water creates localized overheating spots that can warp the steel tank wall, strain welded seams, and severely reduce overall heating efficiency. Verification: Perform a routine annual flush of your water heater tank to remove sediment.
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