What to Do When Your Water Heater Makes Strange Noises

At MSP, we know that a noisy water heater can be more than just a nuisance—it could be a sign that something’s wrong. Strange sounds from your water heater, such as popping, banging, or whining, often indicate it is. Let’s break down what those noises mean and what you should do about them.

If you hear popping or crackling sounds, it’s typically caused by sediment buildup at the bottom of your water heater tank. Over time, minerals from hard water can settle and form a layer of sediment. When the heater operates, the heat can cause these minerals to bubble, creating that distinctive popping noise.

Regular flushing of your water heater can help remove this sediment buildup. If you haven’t flushed your tank in a while, scheduling a maintenance check might be a good idea. This simple service can prevent damage, improve efficiency, and extend the life of your water heater.

Loud banging or thumping sounds could indicate a more serious issue, like a problem with the heating element or a pressure buildup in the tank. If water is heating unevenly, the steam bubbles can forcefully collapse, leading to a banging noise. This issue might also be caused by a valve not working correctly, causing excessive pressure inside the tank.

While a professional technician should inspect this type of noise, there are a few things you can check yourself. Make sure the temperature is set appropriately—around 120°F is best. If it’s set too high, it could contribute to pressure issues. If the noise continues, it’s time to call MSP. Our plumbing experts will inspect your unit and help resolve the issue.

A high-pitched whining or screeching sound might be due to water flow issues. This could happen if the valve is partially closed, the water flow is restricted, or the pressure relief valve is faulty. If the issue is in the valve or pipe system, it could lead to noisy operation.

First, check the valves and ensure they’re open all the way. If the sound persists, the system may have a deeper issue. Please don’t ignore this; it’s essential to have the water heater inspected to prevent any further damage.

If you hear gurgling noises, it might be a sign that your water heater is having trouble heating water properly. This can be a result of a faulty thermostat or a malfunctioning heating element. Gurgling could also mean that air is trapped inside your water heater.

Check the thermostat and ensure it’s functioning correctly. If the noise doesn’t disappear, you may need to contact a professional to inspect and replace the faulty parts.

If you hear strange noises from your water heater, this could be a sign that your system needs maintenance. Fixing it early can save you from more expensive repairs down the road.

At MSP, we are here to help. If you notice any of these sounds or suspect something is wrong with your water heater, don’t hesitate to call us. We’re committed to keeping your home comfortable and running smoothly. Our team of experts can diagnose the issue, perform necessary repairs, and help extend the life of your water heater.