Water Heater Sounds Like A Jet Engine/ Train

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Written By John Roe Stephen

There will be some noise from all tankless water heaters when they first start up and heat the water, but the sound levels are generally acceptable and shouldn’t be cause for alarm. A vacuum may be sucking water out of the unit, so the noise and vibration are so intense when there’s no hot water running.

When other plumbing fixtures are interfering with the water heater’s ability to heat, a check valve must be installed in the waterline. A dirty flow sensor, which regulates how much gas is fed to the tankless water heater, is a typical noise cause.

Other possible noise causes include obstructed or insufficient ventilation or a malfunctioning or incorrectly placed pressure valve. Your plumber should be consulted to determine what’s causing the noise and whether or not it can be fixed.

Is It Normal For A Hot Water Heater To Make Noise?

If your water heater is making noise, here are some likely reasons and the noises you might expect to hear before devoting hours to finding a “Reasons Why Your Heater Is Making Noise” article.

Buildup of Sediment

Debris in the water heater’s storage tank will cause the burner to overheat and spill water. When the water is heated, it sounds like a coffee machine does.

The water bubbles when it passes the sediment layer, causing this noise. Consider boiling water in a covered pot to better grasp the complexities of this issue. In seconds, when the water reaches boiling point, it bubbles and shakes the cover.

An explosion caused by the heater will not destroy your house. On the other hand, the debris might cause the tank to overheat. This weakens the water heater tank over time. Your house may be harmed as a result of the tank’s leakage. There is a risk that the container may rupture.

If your building has any of these problems, expect to shell out tens of thousands of dollars in repairs. So, what can you do to keep dirt from accumulating in your tank?

Your water heater will need to be cleaned often. After an extended time, the quantity of residue can make flushing difficult.


Expanding hot water causes the debris to be pushed aside by the expanding liquid. A rumbling sound may be heard, mainly when the water flows through the ground when this occurs.

It is a sign that the heater is packed with dirt if you can hear a rumbling sound coming from the tank. It reveals that your heater isn’t working correctly, even if it isn’t hazardous.

Remove any dirt in the tank to prevent this problem. You may have to spend more money on repairs or replacements if you leave the residue on your heater.


A ticking sound will be heard if the pressure in your pipe is constantly changing. Nails or nipples attach a water heater to the plumbing. The qualities of these nipples help store heat and improve the efficiency of your heater.

Thermostat Not Working Correctly

Leaks in water heaters may also produce noise, as noted in our article “Reasons Why Your Water Heater Is Making a Noise.” Sizzling noises will be heard when you switch off the burner if there is an issue with your equipment.

Your neighborhood plumber can help you with this problem.

How Do You Know If Your Water Heater Is Going To Explode?

When a water heater explodes, the consequences may be catastrophic. Do not wait for a disaster to strike. The following are warning signals that your water heater is about to explode.

The Pressure Relief Valve Is Leaking

In most cases, the pressure release valve may be found on the heater’s upper side. At exceptionally high levels, it opens to allow water to exit the tank and reduce the pressure within. A leaky valve indicates a problem with the tank’s temperature or pressure.

Both of these options might result in an explosion, so they’re both risky. In addition, a worn-out or often changed valve may be unable to withstand the tank’s pressure or heat, resulting in a failure that would imprison the tank’s extraordinarily high pressure.

Noises Of Popping And Banging

That popping or banging sound you hear from a popcorn maker is an indication that your heater is about to break down. In a heating tank, sediment from water collects at the bottom and acts as an insulation between the water and the burner.

When the burner is forced to operate longer, it causes the tank to heat up more quickly. The popping sound is caused by water trapped under the sediment heating up and bubbling up.

Faulty Systems

Incorrectly fitted heaters and heater settings may cause expansions. Water corrosion may create an electrical short in an electric heater.

Step Guide to test Element in Water Heater

These Are The Steps You Should Take To Test The Element In Your Water Heater

Step 01. Disconnect The Power Cord From The Outlet

An error here might be between a successful water element test and a failed one. Locate your circuit breaker linking your water heater to the central electric panel. In most cases, it’s in a metal box mounted on the wall.

All breakers are usually marked with the brand of the item they power. Turn off the water heater you found by looking for the one labeled “water heater.” If you’re unsure which breaker is responsible for your heater, turn off the whole electrical supply.

Step 02. The Metal Box’s Cover Is Lifted

Open the package by swiping the metal lid. The panels attached to the water heater’s side are kept in place by screws visible in this area.

Depending on the size, there are usually one or three panels on most water heaters. Make sure that the bolts don’t come out in the tiniest of locations in your house.

Step 03. It Is Time To Make Sure The Power Is Out

Make sure the electricity has been turned off by checking again. A non-contact voltage detector should be placed near the wire that links the heating element to the thermostat.

Beeping or flashing lights means that the water heaters are still hooked up to an electrical source and should be replaced. Before continuing, make sure the power is fully turned off.

Step 04. Take a Look at Your Water Heater Element’s Reading

Rx1k, or 1000 times 1000 ohms, is the multimeter dial’s lowest setting. Be sure to pay particular attention to the bottom of your heater tank. You’ll see the wattage and ohms engraved.

When using a multimeter, you can tell whether your heater is 3500-watt or 4,500-watt by reading the multimeter.


If your hot water tank is making a rumbling or banging noise, try emptying away the sediment at the bottom of the reservoir. Set the gas valve to the “pilot” position if your reservoir is fuel-powered. Shut off the tank’s circuit breaker if it is powered by electricity.

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