Why Is My Water Heater Making Noise? 7 Common Sounds Explained
A water heater usually makes some noise while it runs. Water moves through the tank, metal expands and contracts as temperatures change, burners ignite, heating elements cycle, and tankless systems use fans and internal controls during operation. The important question is whether the sound is normal for your system or something that has recently changed. Why is your water heater making noise? Popping and rumbling can point toward sediment inside a storage tank. Banging and knocking may involve water pressure, pipe movement, or thermal expansion. Hissing, humming, whistling, clicking, and unusually loud burner noises can each indicate
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