Water Heater Sounds Like a Jet Engine: Causes and Solutions


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When your water heater starts making noises resembling a jet engine, it can be a cause for concern. Not only is the noise disruptive, but it may also indicate underlying issues with your water heater. In this article, we will explore the possible causes of a water heater sounding like a jet engine and provide solutions to resolve the problem. Understanding these causes and taking appropriate action can help restore the quiet and efficient operation of your water heater.

1. Sediment Buildup in the Tank

One of the common culprits behind a water heater sounding like a jet engine is sediment buildup in the tank. Over time, minerals and debris in the water supply can settle at the bottom of the tank, creating a layer of sediment. When the water heater heats the water, the trapped sediment can cause loud rumbling or popping noises. This phenomenon is known as “water hammer” or “sediment buildup.”

To address sediment buildup, you can follow these steps:

  1. Drain and Flush the Tank: Turn off the water heater and connect a garden hose to the drain valve. Open the valve and allow the water to drain completely. Once drained, close the valve and fill the tank partially with cold water. Repeat the draining process until the water runs clear, removing as much sediment as possible.
  2. Regular Maintenance: Implement a regular maintenance schedule for your water heater. This includes draining and flushing the tank at least once a year to prevent sediment buildup. Consult your water heater’s manual for specific instructions on maintenance.

2. High Water Pressure

Excessive water pressure can also contribute to the noise resembling a jet engine. When the water pressure is too high, it creates turbulence as it flows through the pipes, leading to loud noises. The increased pressure puts strain on the water heater and other plumbing components, potentially causing damage over time.

To address high water pressure, consider the following steps:

  1. Install a Pressure Reducing Valve: A pressure reducing valve can be installed near the main water supply to regulate the water pressure entering your home. This valve ensures that the water pressure remains at a safe and optimal level, reducing the chances of noisy operation and potential damage to the water heater.
  2. Check the Pressure Relief Valve: The pressure relief valve is a safety device present on most water heaters. It releases excess pressure to prevent tank rupture. If the valve is faulty or malfunctioning, it can lead to increased pressure and noise. Consult the manufacturer’s instructions or a plumbing professional to inspect and replace the pressure relief valve if necessary.

3. Loose Heating Element

Another possible cause of a water heater sounding like a jet engine is a loose heating element. The heating elements are responsible for heating the water inside the tank. Over time, vibrations and normal wear and tear can cause the heating elements to become loose, resulting in a rattling or vibrating noise during operation.

To address a loose heating element, follow these steps:

  1. Power Off the Water Heater: Before inspecting or adjusting the heating elements, ensure that the power to the water heater is turned off. This will prevent any electrical accidents or damage.
  2. Inspect and Tighten the Heating Elements: Carefully remove the access panel on the water heater to access the heating elements. Check if they are loose and use an appropriate tool to tighten them gently. Be cautious not to overtighten, as this can lead to damage.

4. Failing or Faulty Heating Element

A failing or faulty heating element can also contribute to the jet engine-like noise from your water heater. When the heating element is damaged or nearing the end of its lifespan, it may emit unusual sounds as it struggles to heat the water effectively.

To address a failing or faulty heating element, consider the following steps:

  1. Identify the Problematic Element: If you have a dual-element water heater, you may need to identify which heating element is causing the noise. Turn off the power, and using a multimeter, test the continuity of each element to determine if any are faulty.
  2. Replace the Heating Element: If you find a faulty heating element, you can replace it by following the manufacturer’s instructions or seeking assistance from a professional plumber. Ensure that you choose the correct replacement element for your specific water heater model.

5. Water Hammer

Water hammer refers to the loud banging or knocking noise that occurs when the flow of water is abruptly halted. It typically happens when a valve is closed suddenly or a water supply line is rapidly turned off. Water hammer can also be caused by faulty or worn-out plumbing components.

To address water hammer, consider these solutions:

  1. Install Water Hammer Arrestors: Water hammer arrestors are devices that absorb the shock and pressure created by sudden water flow changes. They are typically installed near the affected plumbing fixtures or appliances, such as the water heater. Consult a plumber to determine the appropriate type and location for water hammer arrestors in your plumbing system.
  2. Check and Replace Faulty Valves: Faulty or worn-out valves can contribute to water hammer. Inspect all valves in your plumbing system, including those connected to the water heater, and replace any that are faulty or not functioning properly.


Q1: Is it normal for a water heater to make noise? A1: Some level of noise is normal for a water heater, such as the sound of water flowing or occasional popping noises. However, loud, persistent noises resembling a jet engine are not normal and should be addressed.

Q2: Can a noisy water heater be dangerous? A2: While a noisy water heater is not necessarily dangerous on its own, it can indicate underlying issues that may compromise the efficiency and lifespan of the appliance. It’s important to identify and resolve the cause of the noise to maintain the safe and reliable operation of the water heater.

Q3: Should I attempt to repair the water heater myself? A3: If you have the necessary knowledge and experience, you may attempt minor repairs on your water heater. However, it’s recommended to consult a professional plumber for complex issues or if you are unsure about performing the repairs yourself.

Q4: How often should I perform maintenance on my water heater? A4: Regular maintenance, including draining and flushing the tank, should be performed at least once a year. Additionally, it’s essential to inspect the water heater periodically for signs of damage or issues that may require professional attention.

Q5: Can a water heater noise be a sign of imminent failure? A5: While a noise alone does not necessarily indicate imminent failure, it can be a warning sign of underlying problems. Ignoring the noise and failing to address the root cause may lead to more significant issues and potential water heater failure over time.

Q6: When in doubt, should I consult a professional plumber? A6: If you are unsure about the cause of the noise or how to address it, it’s always advisable to consult a professional plumber. They have the expertise and experience to diagnose and resolve water heater issues effectively.


If your water heater sounds like a jet engine, it’s important to identify the cause and take appropriate action to resolve the issue. Sediment buildup, high water pressure, loose or faulty heating elements, and water hammer are some common causes of this problem. By following the solutions provided and consulting a professional when needed, you can restore the quiet and efficient operation of your water heater, ensuring a reliable supply of hot water for your household.

Remember, regular maintenance and prompt attention to any unusual noises or issues can help prolong the lifespan of your water heater and prevent costly repairs or replacements in the future.

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