What’s That Sound? 4 Common Water Heater Sounds and What They Mean

Have you ever been startled by a strange noise coming from your water heater? Those sounds can be slightly spooky but usually mean something needs fixing. Like any other home appliance, your water heater may develop issues over time. Investigate any unfamiliar sounds right away. Small problems can easily grow into much larger ones. If you’re unsure, calling a plumber is always a smart move. Texas Rooter's experts have handled every plumbing problem imaginable; they'll pinpoint the source of those strange noises.

Popping or Rumbling

If your water heater sounds like a pot of boiling water, sediment has likely built up inside the tank. Over time, minerals in your water settle at the bottom, creating a layer of debris that traps water underneath. When the water heats up, it pushes through the sediment, making a popping or rumbling noise.

What Should You Do?

This issue is common in areas with hard water. The best way to prevent it is to flush your tank regularly. If the noise is persistent, a plumbing service might be needed to remove the buildup safely. Ignoring the problem can make your heater work harder than necessary, shortening its lifespan.

Screeching or Whistling

A high-pitched screeching or whistling noise can be alarming, but it’s usually caused by restricted water flow. This often happens when a valve is partially closed or when the pressure inside the tank is low.

What Should You Do?

First, check the water inlet and outlet valves to ensure they are fully open. If the noise continues, it could mean a bigger pressure regulation issue or a faulty unit component. Calling a plumber in Allen, TX to inspect the system is a good idea, as high pressure can lead to serious damage if left unchecked.

Banging or Knocking

Does it sound like someone is knocking inside your walls when the water heater is running? This could be a water hammer. A water hammer happens when water suddenly stops or changes direction, creating a shockwave through the pipes. It’s more common in homes with old pipes or when the system lacks proper cushioning.

What Should You Do?

Installing water hammer arrestors can help absorb the shock and prevent further damage. If the knocking is coming from inside the tank, it may be time for a water heater repair. The team at Texas Rooter can inspect your system and recommend the best solution.

Hissing or Sizzling

If you hear a hissing or sizzling sound, your water heater might be dealing with a leak. This happens when water drips onto the burner or heating element, creating steam as it comes into contact with the hot surface.

What Should You Do?

A leaking water heater can lead to bigger problems, such as rust, corrosion, and flooding. Turn off the heater's power and water supply immediately and call for plumbing service. The professionals at Texas Rooter can diagnose the issue and determine whether you need a simple repair or a full replacement.

Don’t Ignore the Sounds – Get Help Today!

Strange noises from your water heater are more than annoying—they can be warning signs of bigger issues. Whether the noise is a simple fix or a more serious problem, addressing it early can prevent expensive repairs.

If you’re experiencing these sounds, don’t wait for the problem to worsen. Contact a trusted plumber or schedule a water heater repair today. The experts at Texas Rooter are ready to help keep your water heater running smoothly and quietly. Call now to get your system checked and enjoy peace of mind, knowing your home’s hot water supply is in good hands!