FAQ: What do I do if my water heater makes noises?

A noisy water heater is often an early warning sign of a developing issue that should not be ignored.

 

• The most common culprit is sediment buildup, typically lime scale or minerals, that accumulate at the bottom of the tank. As the heater operates, this layer of sediment traps water beneath it, causing it to overheat, boil, and create a rumbling or popping sound. This not only creates noise but also forces your system to work harder, reducing its efficiency and lifespan.

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• Other noises, like high-pitched whining, often point to water flow restrictions or issues with inlet valves, while cracking or ticking sounds are usually harmless, caused by the natural expansion and contraction of the metal tank as it heats and cools.

 

For persistent rumbling, banging, or screeching, it's best to consult a professional plumber. They can safely flush the tank to remove sediment, diagnose faulty components like the heating element or TPR valve, and ensure your unit operates safely and efficiently, preventing a minor annoyance from turning into a major failure or leak.