Why Whirlpool Dishwasher Making Loud Humming Noise?

whirlpool dishwasher
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A whirlpool dishwasher is a kind of dishwasher that is best for washing dishes. Dishwashers are devices that mainly were dishes when the owner is unable to or has worked. A whirlpool dishwasher is essential as it saves the time of an individual and the energy that one needs to wash dishes.

Humming noise results from the movements of water in a particular path. For example, the whirlpool dishwasher makes a loud humming voice when water forces itself out of the dishwasher to the drain pump, which runs continuously, producing a humming noise. However, the humming sound from a whirlpool dishwasher results from many reasons in the parts of the dishwasher.

Causes and solutions of humming noise in the whirlpool dishwasher

Cause; Issues with the drain pump.

drain pump
Source: amazon.com

The drain pump is part of the whirlpool dishwasher that allows the flow of water in the dishwasher. Therefore the humming noise comes when water in the drain pumps forces water out of the dishwasher. Continuous running of water will lead to the production of a buzzing noise. The drain pump issues result from a faulty drain pump or debris in the drain line.

Before solving these issues, first, check the problems with the drain pump. By following the steps below, you will be able to identify the problems with the drain pump.

  • Switch off the whirlpool dishwasher.
  • Unplug the whirlpool dishwasher to access its part carefully.
  • Open the inner parts of the dishwasher.
  • Locate the drain pump.
  • Open the inner parts of the drain pump.
  • Check if the drain pump is faulty using a finger to feel the impellers or the presence of food particles.
  • Remove the food particles or replace the drain pump.

Solution; replace the drain pump if it is faulty or clean the drain pump to remove food particles if it is dirty

Cause; Hydraulic shock in the valves.

Humming noise results from vibrations in the water pipes from the whirlpool dishwasher where the valves suddenly close. When the valve suddenly closes, the flowing water with a high pressure forces itself to stop immediately, producing a humming noise. Hydraulic shock damages the dishwasher and other components it connects to.

Check The Valve From Amazons Product Page.

To identify the hydraulic shock in the valves;

  • Clean the valves and the pump inlets.
  • Separate the pump and the valves
  • Test the pump and valve separately.

Solution; replace the valve

After testing the valve and confirming that the valve has a problem, immediately replace the valve for normal operations in the whirlpool dishwasher.

Cause; Presence of food particles in the dishes

Food remains in the dishes accumulates in the whirlpool dishwasher, which later flows down through the drain pump. As this food moves, the drain pump will break them into smaller particles for easy movement. The process of breaking the food particles then causes humming noise in the whirlpool dishwasher.

To test the presence of food particles and debris in the whirlpool dishwasher, confirm the drain pumps line by following the steps below;

  • Switch off the whirlpool dishwasher.
  • Remove the drain pump from the rest of the whirlpool dishwasher.
  • Unscrew the inner parts using pliers.
  • Feel the walls of the drain pump to identify the debris that accumulates.

Solution; clean the drain pump regularly

· Cause; Faulty fan

A fan is mainly to help in the circulation of air to the whirlpool dishwasher. Therefore, when the fan is faulty, the dishwasher will be humming noise when drying the dishes since there is no air circulation.

When the dishwasher fails to dry after washing, then there is a problem with the fan .to check the issues with the fan;

  • Switch on the dishwasher system
  • Turn on the fan.
  • If the fan fails to dry, then the fan has a problem.

Solution; repair the fan or replace it

A defective motor makes the whirlpool dishwasher power, but it does not start but instead starts humming. To identify if the motor is faulty, consider checking the drain pump and the resistance of power in the motor.

When starting the dishwasher and it fails to start, the motor has a problem with powering the whirlpool dishwasher. The steps below show how to identify a defective motor.

  • Switch off the whirlpool dishwasher
  • Cite the location of the motor in the whirlpool dishwasher.
  • Reset the resistance in the multimeter.
  • Turn on the dishwasher.
  • Inspect how the motor works; if it fails to work after all this, then you are sure that the motor needs an action.

Solution; replace the motor

· Cause; Older whirlpool dishwasher system

An old whirlpool dishwasher system tends to produce humming noise since some parts are worn out and cannot effectively produce the hums. As a result, continuous hums in the whirlpool dishwasher lead to a buzzing noise.

Older systems include loose parts like screws and nuts that can cause leaks in the whirlpool dishwasher. In most cases, repairing such a system cannot help. There are steps to check if the whirlpool system is old enough, which include;

  • Turn off the whirlpool dishwasher
  • Listen to the sounds it is producing.
  • Open the whole system to access every part.
  • Confirm the state of the screws and nuts, and if they have rust, then it is old.
  • Check the other parts if they are in a good state.

Signs of an old system

  • Availability of rust in most parts of the system.
  • Wet dishes after cleaning.
  • It consumes a lot of energy when washing the dishes.
  • The whirlpool dishwasher takes a long time to start.
  • The dishwasher door is hard to open to place the dishes to wash.

Effects of a whirlpool dishwasher making a loud humming noise

whirlpool dishwasher making loud humming noise
Source: searspartsdirect.com

I. Increase in the electricity bills in a home

Loud humming noise from the whirlpool dishwasher in the house increases the electrical bills since the dishwasher consumes a lot of energy when starting and during its daily operations as there is the production of humming noise which uses electricity.

II. Source of destruction in the house

Loud humming noise in the house is a source of destruction to people like children sleeping for students since the whirlpool dishwasher hums even if it is not working.

III. It wastes a lot of cash for repairs and replacements

A whirlpool dishwasher that hums causes a loss of cash for replacing now and then since humming results from a series of issues. Some of the parts in the whirlpool dishwasher are expensive when buying.

You Might Be Interested to Read: Lg dishwasher making high pitched noise-how to troubleshoot.

Frequently asked questions

  • What is the importance of hooking up the issues with the dishwasher immediately?

Hooking up whirlpool dishwasher problems is essential because it helps the dishwasher work more effectively. As usual, it helps reduce further damage to the whirlpool dishwasher that will raise the cost of replacing the dishwasher. Moreover, it protects the whole system and prolongs its life span.


The Whirlpool dishwasher makes loud humming noise for several reasons with the dishwasher, mostly the faults that accompany the dishwasher when washing dishes. The article shows the causes of humming noise in the whirlpool dishwasher, how to check the faults before solving the solutions to fix the defects with the dishwasher.

Finally, some parts in the dishwasher need a technician to open and check the faults and replace necessary parts that a user cannot personally replace. Consider reading the manufacturer’s manual in opening and inspecting the whirlpool dishwasher to avoid damaging it.

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