Is That Noise Coming From Your Water Heater Normal?

When your water heater starts making strange noises, it can be easy to assume the worst. However, not every sound coming from your unit signals a serious problem. Some are common and harmless, while others may indicate the need for maintenance or water heater repair in Chatsworth, CA. Knowing what they mean can help you determine if immediate action is necessary or if it’s something that can wait.

Our experts at Roberts Plumbing Hydro Jet & Rooter explain some common water heater noises and their causes:

Popping or Crackling Sounds

Popping or crackling noises are often a sign of sediment buildup in the tank. Over time, minerals and debris from your water supply can settle at the bottom, creating a layer that traps water beneath it. When the heating element warms up, the trapped water turns to steam and forces its way through the sediment, resulting in the popping sounds.

This issue is most common in areas with hard water, which has a high mineral content. While not an immediate emergency, sediment buildup reduces your water heater’s efficiency and can lead to overheating. Regular flushing is an essential maintenance task that can extend the life of the unit and spare you from untimely hot water heater replacement.

Humming Noise

A humming noise usually happens when components inside the water heater, such as the heating element, are slightly loose. This vibration can cause the hum you hear, particularly in electric water heaters. While this issue is not typically harmful, it’s still a good idea to address it to avoid unnecessary wear and tear on the unit.

Tightening or checking for proper alignment of the loose part is usually all it takes to stop the humming. It’s a relatively small fix, but if you’re unsure how to proceed, calling professional water heater services is always a safe choice.

Screeching or High-Pitched Whistling

Screeching or whistling sounds occur when water flow is restricted in your heater. This often happens if valves, like the inlet or outlet, are not fully open or if there’s a buildup of pressure within the system. High water pressure might not only cause noise but can also damage the plumbing over time.

To address this, check all valves to ensure they are correctly positioned and clear any obstructions. If the noise continues, there might be a deeper issue with your water heater’s internal components that requires inspection by a professional.

Banging or Knocking

If you hear a loud banging or knocking noise when you turn off a faucet or appliance, you’re likely dealing with a “water hammer”. This happens when water flow suddenly stops or changes direction, causing a shockwave through your plumbing pipes.

A water hammer is more of a plumbing system issue than a water heater defect, but it can damage the water heater and pipes over time. Installing a water hammer arrestor can resolve this problem and protect your system from stress and leaks.

Clicking or Tapping

Clicking or tapping noises are typically caused by the expansion and contraction of metal parts within the water heater as it heats up or cools down. This is usually harmless and considered a normal part of the heater’s operation. However, frequent or excessively loud clicking may indicate an issue with the thermostat or other components.

A professional can inspect the unit to ensure everything is functioning correctly and provide repairs if needed.

Short Gurgling Sounds

Gurgling noises may occur when air is trapped in the water heater or the system’s pipes. This can happen during the first startup of a new water heater installation or following maintenance work. The sound should subside on its own once the air has been expelled.

However, persistent gurgling could point to sediment or air leaks in the system and should be checked out if it does not go away.

Need Help Keeping Your Water Heater in Good Condition? Count On Our Team!

A noisy water heater can be unsettling, but identifying the specific type of sound can help you determine what action to take. Roberts Plumbing Hydro Jet & Rooter is the local plumbing company that you can turn to for all your water heater concerns. Whether you own a traditional storage-type model or a tankless water heater, we are confident that we can deliver straightforward solutions that keep your unit running smoothly.

We are licensed, bonded, and insured, so you can trust that our services are legitimate and of the highest quality. We have been in business for over 25 years, and our skilled technicians are always dedicated to customer satisfaction.