Why Your Water Heater Is Making Noise—and When to Worry If your water heater has started making noise, it’s natural to wonder whether something is about to fail. Many sounds are caused by common, fixable issues—especially mineral buildup—while a few are red flags that warrant prompt inspection by a licensed plumber. In most homes, water heaters cycle on and off to maintain temperature. That means occasional low-level sounds can be part of normal operation, particularly during heating and shortly afterward. Rumbling or vibrating (often tank “bottom” sounds) A heavy rumble that grows more noticeable over time is frequently caused by sediment collecting at the bottom of the tank. As the burner or heating element warms the water, that sediment can shift and heat unevenly, producing a low, continuous noise. Popping, crackling, or banging Popping or crackling is commo ... Read more »
Why Your Water Heater Is Making Noise—and When to Worry If your water heater has started making noise, it’s natural to wonder whether something is about to fail. Many sounds are caused by common, fixable issues—especially mineral buildup—while a few are red flags that warrant prompt inspection by a licensed plumber. In most homes, water heaters cycle on and off to maintain temperature. That means occasional low-level sounds can be part of normal operation, particularly during heating and shortly afterward. Rumbling or vibrating (often tank “bottom” sounds) A heavy rumble that grows more noticeable over time is frequently caused by sediment collecting at the bottom of the tank. As the burner or heating element warms the water, that sediment can shift and heat unevenly, producing a low, continuous noise. Popping, crackling, or banging Popping or crackling is commo ... Read more »