“Although noise is relatively normal for most water heaters, it’s a sign that something is reducing the volume at the bottom of the water heater’s tank and needs to be addressed before it turns into something major, like leaks.
Humming noises coming from the water heater can be an indication that some components are coming loose. These sounds happen by the vibrations occurring within the water unit itself. Luckily, there’s an easy solution that anyone can do to solve this noise.
The solution: Ensure the water heater is off so that you can inspect that all elements are tight. Before you start tightening screws, bolts and other pieces, make sure the water heater has been turned off for a few hours.
2. Knocking or Hammering
A hammering sound is a strange one to hear coming out of the water heater. This is often caused by water crashing into shutoff valves too quickly. This isn’t a concerning issue, but it can be pretty loud and annoying. Sediment buildup can also cause these knocking or hammering sounds, as steam bubbles can’t reach the surface. The sediment moving up and down the water tank will also cause these noises.
The solution: In this case, an extra piece can help stop the noise. You can find a water hammer arrestor at a local hardware store to absorb the shock when water stops due to fast closing shutoff valves. A water hammer arrestor is relatively easy to install and will take care of the sound instantly.”
Read more about water heater noises here.
Another noise that you may hear is a screeching sound. In this case, screeching is usually caused my pressure issues where water is forced to pass through a partially closed valve. Any time you have a pressure issue with a water heater you should never attempt to correct the problem yourself. Instead, contact a qualified plumber to resolve the problem!
Team Mechanical offers a variety of water heater services including maintenance and repair. If your water heater is making strange noises please don’t hesitate to call us at 612-729-5646!