One of the most common questions asked by the homeowners is, “Why my water heater making noise?” If you’re also having this problem. Just know that we truly understand how annoying these noises can be. However, the real question is what causes these noises? Well, there can be several reasons that can result in your water heater making noise. The good news is you can prevent these issues. But in order to do that, it’s crucial to understand the causes first. Understand every reason and reading about it on a manual can be a very time-consuming process. So, to help you with that, we’ve prepared a list of the 12 most common reasons why your water heater making noise. 

Accumulation of Sediment Deposit 

1. Popping

Popping is one of the very common causes of a noisy water heater. It happens due to sediment build-up inside the heater’s tank. What is sediment? Semidnets are solid particles that settle down at the bottom of the water tank. The reason for sediment build-up can be;

  • Sand or debris enters inside the heater’s tank along with the water supply.
  • Minerals deposits are produced as the result of heating water.                                              

These sediments reduce the volume of water in the bottle of the tank. As a result, when the tank is heated, it starts creating popping noises inside the heater.

The Solution 

One easy solution to resolve this problem is flushing the water heater completely, but it may not be the best answer. Because sometimes times the sediment build-up covers the entire bottom completely, making it impossible to flush the tank. So, in this situation, you can try a water softener that can eliminate the sediment build-up in your tank. However, that doesn’t work as well; purchasing a new heater is the only solution. 

2. Mineral Build-up 

If you live in an area that has hard water, then your water heater tank is most likely to catch mineral deposits time after time. Hard water consists of mineral-like calcium carbonate and magnesium carbonate. When water is boiled in the water heater, the minerals start separating from the water and coat at the boundaries of the water tank and heating components. These minerals build-up produces noises. 

The Solution

Luckily, these minerals are completely harmless; however, if it starts to disturb the flow of water, it can be dangerous. In order to solve this issue, you can flush a large amount of water which can clean the minerals.

3. Rumbling 

If your water heater is producing a rumbling noise in the tank, this indicates a large amount of dirt stuck in the heater. The noise you hear is from the water moving through the dirt. This issue is not critical, but it can reduce the efficiency of a water heater. That means it will consume more power than required to heat the water every time you turn it on.

The Solution

In order to resolve this issue, all you need to do is clean the dirt from the tank. You can do it yourself or simply get professional help by calling a plumber. 

4. Hissing 

If your electric heater is producing hassling sound during heater the water, it indicates the sediment build-up on the heating component. Every water heater has a heating component that boils the water in the tank; when it’s burning the sediment that creates noises like sizzling, crackling, or hissing. 

The Solution

To solve this problem, simply turn off the water heater and take out the heating component. Now clean it using vinegar solution. Next, soak the component n the vinegar and start rubbing it gently with a wire brush. Or you can also just replace the heating component to avoid this hassle. 

Restricted Water Flow 

5. Sizzling

If your water heating is making noise when hot water is turned on, it might be because water is not flowing into the tank properly. Due to the restricted water flow, the heater produces a sizzling sound.

The Solution

You can easily detect this problem by checking the temperature and pressure relief valve. Then, turn on the heater and check if there’s any water leakage from the tank while observing the sizzling noise from the tank. If you hear it, shut down the water tank immediately and contact the professional plumber company right away because your water heater is producing excessive pressure, which can be very dangerous. 

6. Ticking 

If your water heater pipes are producing a ticking sound, it’s most probably due to the air pressure. Next, you can see the nipples that connect the pipes to the water heater. The purpose of these nipples is to store heat and maximize the efficiency of your water heater. 

The Solution 

If you’re sure that ticking noise is coming from the pipes, you can simply remove the nipples and install non-heat trap nipples. It will eliminate the ticking noise. 

Loose Fittings 

7. Humming 

Sometimes you might hear a humming noise coming from the water heater. That’s because of the faulty heating element or in the fitting. As the cold water supply enters the tank, it shakes the heating component, resulting in humming noises. 

The Solution 

You can simply fix this problem by tightening the water heater component. If the problem still persists, replace the heating component with a new one. 

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