Table of Contents

If you have ever heard strange noises coming from your water heater, you may be wondering what is causing them and if they are a cause for concern. Here are some common reasons why your water heater may be making noises and how to fix them:

Why Your Water Heater is Making Strange Noises and How to Fix It
Side view of handyman, technician using screwdriver while fixing boiler or water heater.

1. Introduction

Water heaters are essential appliances in every home, providing hot water for showers, laundry, and dishes. However, when the water heater starts making strange noises, it can be worrying. Here are some common reasons why your water heater may be making noises and how to fix them.

2. Check the Temperature and Pressure Relief Valve

The first thing to do is to check the temperature and pressure relief valve that is usually located on the side of the water tank [1]. This valve is intended to allow water to escape the tank if the pressure inside becomes too great. If the source of the sound is this relief valve, immediately turn off the gas, electricity, and water in the tank and seek professional help.

3. Install a Water Hammer Arrestor

A water hammer arrestor is relatively easy to install and will take care of the sound instantly if your water heater is making banging or knocking sounds [2].

4. Adjust the Pressure Valves

The ticking and tapping sound that water heaters sometimes make are often due to the pressure within the pipes being a bit off. You can adjust the pressure valves to fix this issue [3].

5. Drain and Flush the Water Heater

If your water heater is rumbling, this may be due to sediment buildup at the bottom of the tank. You can drain and flush the water heater to remove the buildup [4].

6. Turn Down the Water Heater’s Temperature

If the water in your tank is boiling, it can make a sound like the water is boiling inside your water heater tank. To fix this, turn down the water heater’s temperature and test the T&P valve to make sure the water heater can release built-up pressure [8].

7. Remove Sediment Buildup

Sediment buildup on the bottom of the tank can also cause popping sounds. To fix this, remove the residue that’s contributing to the bothering sounds [9].

8. Replace the Anode Rod

If your water heater is making high-pitched noises, it may be due to the anode rod reacting with the water. Over time, high pH levels can cause a buildup of gel on the bottom of the tank, which decreases its overall efficiency. To fix this, replace the anode rod [10].

9. Conclusion

Water heaters are essential appliances in every home, but they can sometimes make strange noises that can be concerning. The good news is that many of these issues can be easily fixed. If you’re experiencing any of the noises mentioned above, be sure to follow the steps outlined in this article to help you diagnose and fix the issue.

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