Discovering unusual sounds from your water heater can be alarming, but understanding why and how to address it can save you time, money, and stress. In this blog post, we will explore everyday water heater noises, when they might indicate a problem, and what steps you can take to resolve them.
Common Water Heater Noises
Water heaters can make a variety of sounds, each indicating different issues:
Rumbling
A deep, rumbling sound often indicates sediment buildup in the water tank. This sediment consists of minerals that settle at the bottom of the tank, especially in areas with hard water. When the heater heats water, it bubbles through the sediment, causing the tank to rumble. DIY enthusiasts can try flushing the tank with a hose to remove sediment or use descaling solutions to break down mineral deposits.
Popping
Like rumbling, popping noises are caused by sediment and mineral buildup inside the tank. As the water heats up, steam bubbles form under the sediment and burst, creating popping sounds. Flushing the tank annually can prevent sediment buildup and reduce these noises. If an aluminum anode rod reacts with high alkalinity levels, a plumber may need to replace it to resolve the issue.
Sizzling, Hissing, or Crackling
These sounds are more common in electric water heaters and are typically caused by sediment buildup around the heating elements. Flushing the tank annually helps prevent sediment from burying the heating elements and causing these noises. Gas water heaters may produce sizzling sounds due to internal condensation dripping onto burners, indicating a potential tank leak that requires a plumber’s inspection.
Ticking
Changes in water pressure, heat trap nipples, or loose pipe straps can cause ticking noises around the water heater. While generally harmless, loose pipe straps should be tightened or replaced to prevent pipes from shifting and causing ticking sounds. Adjusting water heater settings or replacing heat trap nipples can also mitigate ticking noises caused by pressure changes or efficiency features.
Screeching, Screaming, or Singing
High-pitched noises from the water heater, similar to a boiling kettle, often indicate severe water flow restrictions, typically at the temperature and pressure relief valve. If you hear these noises, immediately turn off the heater’s gas or electricity and the water supply and contact a plumber to inspect and address the issue.
Which Noises are Cause for Concern?
While some water heater noises are harmless and quickly resolved, others can signal more serious problems. Sediment buildup is often unavoidable, especially in areas with hard water or high mineral content. Regular water softener use can help reduce mineral accumulation and sediment buildup. However, annual flushing and draining of the water tank remain essential to prevent decreased heating efficiency, potential clogs in drain valves, and safety hazards.
What to Do When Your Water Heater Makes Noise
Dealing with a noisy water heater typically requires professional intervention, especially if you lack experience with plumbing tasks. Certified plumbers should perform annual maintenance tasks such as flushing the tank to ensure your water heater operates efficiently and safely.
Residents in Scottsdale, Phoenix, Glendale, Buckeye, Cave Creek, Chandler, Avondale, Gilbert, Peoria, Surprise, El Mirage, Apache Junction, Mesa, Tempe, or Goodyear can rely on Custom Plumbing of Arizona for expert assistance with water heater issues. Our certified plumbers are equipped to handle installation, repair, or replacement services, ensuring your water heater operates reliably. Whether you’re dealing with a minor noise issue or suspect a more significant problem, don’t hesitate to contact us at 602-866-2665. Schedule a free inspection today to maintain your water heater’s efficiency and longevity.