Water heaters are indispensable in modern households. They are one of the most frequently used appliances, responsible for providing hot water for the dishwasher, shower, sinks, and washing machine.
A water heater is a mechanical device that makes a certain amount of noise. While some water heater noises are familiar, others can be serious and worrying, indicating an underlying issue that needs attention. Homeowners should learn to identify these noises to ensure efficient functioning. Here are some common noises a water heater can make and what they mean:
HUMMING
A water heater usually hums when the cold water flows into it. Although the noise is not severe, many people can find this continuous, low-frequency humming or vibrating sound annoying. Generally, a humming water heater is due to a loose heating element making the water around it vibrate. Turn the water heater off and tighten the heating element to fix the issue.
CRACKLING
Crackling noises from the gas-powered water heater indicate a condensation issue. Condensation buildup on the burner can cause crackling sounds. Many people find crackling noises alarming, but they are not serious and easier to reduce. Homeowners should consider insulating the water lines to minimize temperature fluctuations.
POPPING
Popping is another familiar sound a water heater makes. It indicates excess sediment and mineral deposit buildup in the water tank. The water gets trapped beneath the buildup, creating air pockets that burst and create a popping sound as the water heats up. Popping sounds are a serious problem and a regular occurrence in areas with hard water supply. Ignoring the issue can cause the water heater to overheat, damage the internal components, and reduce the unit’s lifespan. While descaling products can help fight the sediments, the best way to fix the issue is to flush and drain the tank to eliminate any sediment buildup.
SCREECHING OR WHISTLING
The high-pitched screeching sound is more than an annoyance and indicates a water flow restriction issue. A partially closed or too-small inlet control valve can restrict water flow through the pipes, resulting in screeching noises. Ensure the valve is fully open to resolve the issue. A professional plumber can also check the temperature and pressure relief valve, usually located on the tank’s side, for malfunctioning and replace it to stop the screeching sound.
TICKING OR TAPPING
Minor ticking sounds arise from sudden changes in water pressure. The inlet and outlet nipples that keep the water warm create a heat trap that can cause these pressure fluctuations. Usually, ticking sounds are harmless and require no action or intervention. Homeowners who find the sound annoying can remove them or consider non-heat trap nipples to fix the noise.
RUMBLING
A water heater can rumble due to sediment buildup or a high temperature. Sediment accumulated in the water heater tank can reduce the unit’s efficiency and lead to premature replacement. Call a professional to flush out the water heater and remove the sediment. Also, change the temperature setting to the level that the manufacturer recommends.
MAINTAIN THE WATER HEATER
Homeowners should stay on top of signs of potential water heater problems and contact a local company if they hear strange noises. Certified professionals can determine and fix the root cause of the issue to improve the unit’s efficiency, reliability, and lifespan.
Water Heater Pros provides water heater installation and replacement services for Las Vegas and surrounding area residents and businesses. Our expert technicians install both traditional and tankless water heaters for homes and other buildings with gas or electric service. We offer the highest quality installers for efficient, versatile water heaters such as Rheem. Ruud, high-efficiency tankless Navien units, and more. Ask about our installation specials.