Dishwasher noise is a common complaint from homeowners. It can range from a low hum to a loud banging noise. The noise can be annoying and disruptive, especially when it’s late at night or early in the morning. In this article, we’ll discuss the different types of dishwasher noises, common reasons for dishwasher noise, and how to troubleshoot and reduce the noise.

What is Dishwasher Noise?
Dishwasher noise is the sound that is produced when the dishwasher is running. Dishwasher noise is usually caused by the motor, water pump, and other components inside the machine. Dishwashers are designed to be as quiet as possible, but some dishwasher models can still be very noisy.
Types of Dishwasher Noises:
The type of noise you hear from your dishwasher will depend on which component is causing the issue. Common types of dishwasher noises include:
- Banging noises: These are usually caused by a loose connection or worn out motor.
- Humming noises: These are usually caused by the motor or water pump.
- Gurgling noises: These are usually caused by a clogged drain or an obstruction in the water line.
- Buzzing noises: These are usually caused by a malfunctioning water inlet valve.
Common Reasons for Dishwasher Noise:
There are several common reasons for dishwasher noise. The most common are:
- Old or worn out parts: Worn out or old dishwasher parts can cause loud and disruptive noises.
- Loose connections: Loose connections can cause rattling noises.
- Clogged drain: A clogged drain can cause gurgling noises.
- Obstructions in the water line: Obstructions in the water line can cause humming noises.
- Malfunctioning water inlet valve: A malfunctioning water inlet valve can cause buzzing noises.
Understanding Dishwasher Operation:
In order to troubleshoot a noisy dishwasher, it’s important to understand how the machine works. Dishwashers use a motor to circulate water and soap through the dishwasher. motor is powered by electricity and is usually located at the bottom of the dishwasher. The motor is connected to a water pump, which pumps the water from the dishwasher to the spray arms. The spray arms then spray the water and soap onto the dishes.
1. Checking the Installation
In some cases, dishwasher noise is caused by improper installation. If the dishwasher is not installed correctly, it can cause rattling noises. To check the installation, make sure the dishwasher is level and all the connections are tight.
2. Locating the Source of the Noise
In order to troubleshoot dishwasher noise, it’s important to locate the source of the noise. To do this, open the dishwasher door and listen for the noise. If the noise is coming from the bottom of the dishwasher, it’s likely caused by the motor or water pump. If the noise is coming from the top of the dishwasher, it’s likely caused by the spray arms or heating element.
3. Troubleshooting a Loud Motor
If the noise is coming from the bottom of the dishwasher, it’s likely caused by the motor. To troubleshoot a loud motor, first check the connections to make sure they are tight. If the connections are tight, check the motor for any signs of wear or damage. If there is damage to the motor, it should be replaced.
4. Inspecting the Spray Arms
If the noise is coming from the top of the dishwasher, it’s likely caused by the spray arms. To inspect the spray arms, check for any signs of wear or damage. If the spray arms are damaged, they should be replaced.
5. Checking the Heating Element
The heating element is located at the bottom of the dishwasher and is responsible for heating the water. If the heating element is malfunctioning, it can cause buzzing noises. To check the heating element, unplug the dishwasher and use a multimeter to test the heating element for continuity.
6. Checking the Inlet Valve
The inlet valve is responsible for controlling the flow of water into the dishwasher. If the inlet valve is malfunctioning, it can cause buzzing noises. To check the inlet valve, unplug the dishwasher and use a multimeter to test the valve for continuity.
7. Checking the Drain Pump
The drain pump is responsible for draining the water from the dishwasher. If the drain pump is malfunctioning, it can cause gurgling noises. To check the drain pump, unplug the dishwasher and use a multimeter to test the pump for continuity.
8. Preventing Noisy Dishes
Noisy dishes can be caused by a buildup of food particles and grease. To prevent noisy dishes, it’s important to clean the dishes before putting them in the dishwasher and to use a rinse aid.
Reducing Dishwasher Noise
There are several ways to reduce dishwasher noise. To reduce noise, make sure the dishwasher is installed correctly and all the connections are tight. It’s also important to clean the dishes before putting them in the dishwasher and to use a rinse aid. Additionally, it’s important to check the dishwasher for any signs of wear or damage and to replace any worn out parts.
Tips for a Quieter Dishwasher
- Check the installation: Make sure the dishwasher is level and all the connections are tight.
- Clean the dishes: Clean the dishes before putting them in the dishwasher.
- Use a rinse aid: Use a rinse aid to reduce noise and prevent noisy dishes.
- Check for worn out parts: Check the dishwasher for any signs of wear or damage and replace any worn out parts.
Conclusion
Dishwasher noise can be disruptive and annoying. Understanding the different types of dishwasher noises and common reasons for dishwasher noise can help you troubleshoot the issue and reduce the noise. In addition to troubleshooting the issue, it’s important to check the installation, clean the dishes, and use a rinse aid. With these tips, you can keep your dishwasher running quietly and efficiently.