Home Improvement Ideas

Solving the Silence: Why Your Dishwasher Hums but Isn’t Filling

Dishwasher hums but no water. Did you know that 49% of dishwasher owners have experienced the frustrating issue of a dishwasher humming but not filling with water? It’s a common problem that can leave you with dirty dishes and a malfunctioning appliance. But fear not because, in this article, we’ll delve into the possible causes and provide helpful troubleshooting tips to get your dishwasher back in working order. So, if you’ve ever wondered why your dishwasher is humming but not filling with water, keep reading to find the solutions you need.

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Understanding Why Your Dishwasher Hums But No Water Enters

The Basics of Dishwasher Operation

Before diving into troubleshooting, it’s essential to understand how a dishwasher works. Here are the main components and their functions:

  1. Water Inlet Valve: This valve controls water flow into the dishwasher. It opens and closes to allow water to enter during the appropriate stages of the wash cycle.
  2. Motor: The motor powers the dishwasher’s various functions, such as spraying water, circulating it through the detergent dispenser, and rotating the spray arms to clean the dishes.
  3. Pump Assembly: The pump assembly pumps water in and out of the dishwasher. It helps drain dirty water and supply clean water during the wash cycle.

Common Causes of Humming Noises

There can be several reasons your dishwasher may emit a humming sound without filling it with water. Some common causes include:

  • Water Supply Issues: Problems with the water supply line or pressure can prevent water from entering the dishwasher, resulting in a humming noise.
  • Float Switch Problems: The float switch is a safety feature that detects the water level inside the dishwasher. It can prevent water from entering the appliance if it malfunctions or gets stuck.
  • Clogged Inlet Screen: Over time, debris and mineral deposits can clog the inlet screen, which filters water before it enters the dishwasher. This blockage restricts water flow and can cause a humming noise.
  • Door Latch Troubles: A faulty door latch may prevent the dishwasher from properly closing, disrupting the water supply and making a humming noise.

Understanding these basics of dishwasher operation and the common causes of humming noises will help you diagnose and resolve the issue more effectively.

Initial Dishwasher Troubleshooting Steps


When faced with a dishwasher that hums but won’t fill with water, there are a few initial steps you can take to troubleshoot and identify the problem.

  1. Check the power supply: Ensure the dishwasher is properly plugged in and the power outlet is functioning. Sometimes, a loose connection or a tripped circuit breaker can prevent the dishwasher from receiving power.
  2. Inspect the dishwasher door: Make sure that the dishwasher door is fully closed and latched securely. An improperly closed door can disrupt the water flow and cause the dishwasher to hum without filling.
  3. Look for visible faults: Examine the dishwasher’s exterior and interior for any visible flaws. This can include checking for loose or damaged hoses, kinked water supply lines, or a blocked float assembly. Addressing these visual issues may help resolve the problem.

By following these initial troubleshooting steps, you can gain insight into the potential cause of the dishwasher humming without water. Further investigation and more specific troubleshooting methods may be necessary if the issue persists.

How to Check for Water Supply Issues

To troubleshoot a dishwasher that is humming but not filling with water, it is essential to inspect the dishwasher’s water supply. This can involve checking the water inlet valve and verifying the water pressure to the dishwasher. Addressing any water supply issues can effectively resolve the humming problem and ensure your dishwasher operates smoothly.

Inspecting Water Inlet Valve

The water inlet valve controls the flow of water into the dishwasher. If there are problems with the inlet valve, it can hinder the water supply and lead to the dishwasher humming without filling. To inspect the water inlet valve, follow these steps:

  1. Please turn off the dishwasher and disconnect it from the power source.
  2. Locate the water inlet valve at the bottom of the dishwasher behind a protective panel.
  3. Examine the inlet valve for any signs of damage or blockage.
  4. If you notice any issues, such as clogs or leaks, consider replacing the water inlet valve.

Verifying Water Pressure to Dishwasher

Inadequate water pressure can also contribute to a dishwasher humming without filling. To ensure the water pressure is at the appropriate level for proper dishwasher function, follow these steps:

  1. Turn off the dishwasher and shut off the water supply.
  2. Disconnect the dishwasher’s water supply line from the water source.
  3. Place a bucket or container under the disconnected water supply line to catch any water.
  4. Turn on the water supply and observe the water flow into the bucket or container.
  5. There may be low water pressure if the water flow is strong or consistent. Contact a professional plumber to assess and address the issue.

By inspecting the water inlet valve and verifying the water pressure to the dishwasher, you can identify and resolve any water supply issues causing your dishwasher to hum without filling. This will help restore proper functionality and ensure sparkling clean dishes with every cycle.

Dishwasher Hums But No Water: The Float Switch Explained


The float switch is a crucial safety feature found in dishwashers. Its primary function is to monitor the water level inside the appliance. If the float switch detects an abnormal or insufficient water level, it can prevent the dishwasher from filling with water.

So, how does the float switch work? The switch consists of a small mechanism that floats on the water surface inside the dishwasher. As the water level rises, the float also rises. When the water reaches the appropriate level, the float switch triggers the dishwasher to start the water intake process. However, if the float switch fails to detect the correct water level, it can lead to the irritating problem of a humming dishwasher that doesn’t fill with water.

A few potential issues can cause the float switch to malfunction and result in a humming noise without water. These include:

  • A misaligned float switch that fails to make proper contact
  • A damaged float switch mechanism
  • A float switch that is stuck in the raised position

Suppose you suspect that the float switch is the culprit behind your dishwasher’s humming but not filling with water. In that case, it’s best to consult the manufacturer’s manual or seek professional help to diagnose and resolve the problem accurately.

IssuePossible CauseSolution
Misaligned float switchImproper positioning of the float switchReposition the float switch to ensure proper contact
Damaged float switch mechanismPhysical damage or wear to the float switchReplace the float switch mechanism
Stuck float switchDebris or blockage preventing the float switch from moving freelyClean the float switch and ensure it moves smoothly

Fixing a Clogged Dishwasher Inlet Screen

If your dishwasher is humming but not filling with water, a clogged dishwasher inlet screen could be the culprit. When debris or mineral deposits accumulate on the inlet screen, water flow is restricted, leading to the humming noise and a dishwasher that doesn’t fill. Luckily, you can resolve this issue by following a few simple steps:

  1. Locate the Inlet Screen: The dishwasher inlet screen is typically located near the water inlet valve at the bottom of the dishwasher. Refer to your dishwasher’s manual or manufacturer’s website for instructions on finding the inlet screen.
  2. Remove the Inlet Screen: Carefully remove it by unscrewing or unclipping it, depending on your dishwasher model. Be sure to handle it gently to avoid damaging the screen.
  3. Clean the Screen: Rinse the screen under running water to remove debris or mineral deposits. Use a soft brush or toothbrush to scrub away stubborn buildup gently.
  4. Inspect and Clear the Inlet Valve: While the inlet screen is removed, take a moment to inspect the water inlet valve. If you notice any visible blockages or debris, remove them using a small brush or toothpick.
  5. Reinstall the Inlet Screen: Once the screen and valve are clean, securely reinstall it in its original position. Ensure that it is tightly fastened, but be careful not to overtighten.

Cleaning the clogged dishwasher inlet screen can restore proper water flow and resolve the humming but no water problem. Ensure that the screen is cleaned regularly to prevent future issues and maintain the efficiency of your dishwasher.

Assessing the Dishwasher Door Latch

A faulty or misaligned door latch can be a common cause of a dishwasher not working correctly, including the issue of not filling with water. When the door latch is not functioning correctly, the dishwasher cannot operate as intended.

To assess the dishwasher door latch, you can follow these troubleshooting steps:

  1. Start by opening and closing the dishwasher door multiple times to check for any stiffness or resistance in the latch mechanism.
  2. Inspect the latch and surrounding areas for any visible signs of damage or misalignment.
  3. Ensure the latch engages securely with the door strike when the dishwasher is closed.
  4. If necessary, lubricate the latch mechanism with a silicone-based lubricant to improve its function.
  5. If the latch is damaged or misaligned, it may need to be replaced. Refer to the dishwasher’s user manual or contact a professional repair service.

By assessing and troubleshooting the dishwasher door latch, you can address any issues preventing the dishwasher from filling with water and get your dishwasher back in working order.

Simple Dishwasher Maintenance to Prevent Future Issues

Regular maintenance is essential for keeping your dishwasher in optimal condition and avoiding potential problems in the future. By following these cleaning and care tips and conducting proactive component checks, you can extend the lifespan of your dishwasher and ensure it continues to work efficiently.

Regular Cleaning and Care

It incorporates cleaning and care into your routine to maintain your dishwasher’s performance and prevent issues like the humming but no water scenario. Here are some critical steps to follow:

  1. Remove any food scraps or debris from dishes before placing them in the dishwasher.
  2. Regularly clean the dishwasher’s interior using a mild detergent or specialized dishwasher cleaner. Pay attention to the filter, spray arms, and door gasket.
  3. Wipe the dishwasher’s exterior with a damp cloth to remove any smudges or spills.
  4. Check and clean the dishwasher’s drain regularly to prevent clogs.

Proactive Component Checks

In addition to regular cleaning, proactive checks of key dishwasher components can help identify potential issues before they become significant problems. Consider the following:

  • Inspect and clean the dishwasher’s spray arms to ensure they are free from blockages.
  • Check the dishwasher’s seals and gaskets for any signs of wear or damage. Replace them if necessary to prevent leaks.
  • Examine the dishwasher’s hoses for cracks or leaks and tighten loose connections.
  • Remove and clean the dishwasher’s inlet screen to prevent clogs and ensure proper water flow.

By incorporating regular cleaning and care practices and conducting proactive checks of critical components, you can maintain the performance and efficiency of your dishwasher, reducing the likelihood of issues like a humming noise without water. Investing a little time in preventive maintenance can save you from more significant repairs.

Dishwasher Making Noise – Other Possible Culprits

When your dishwasher is making noise but is not filling with water, there are a few other potential culprits besides the motor and pump assembly issues. These other factors can also contribute to abnormal dishwasher noises and should be investigated for a comprehensive troubleshooting process.

Motor and Pump Assembly Issues

In some cases, problems with the dishwasher’s motor and pump assembly can cause the humming noise. These components play a crucial role in the dishwasher’s water flow and overall operation. We’ll explore how motor and pump issues can impact the dishwasher’s performance and provide you with troubleshooting steps to address them effectively.

Drain Problems Causing Noise

Another potential cause of abnormal dishwasher noises is drainage issues. Clogged or malfunctioning drains can disrupt the normal functioning of the dishwasher and result in unusual sounds. We’ll explain how these drain problems can impact the dishwasher’s operation and provide you with guidelines to resolve them, ensuring smooth and quiet performance.

By investigating motor and pump assembly issues and addressing drain problems, you can effectively troubleshoot and resolve the noise from your dishwasher. These troubleshooting steps will help you identify and fix the underlying causes, ensuring your dishwasher operates efficiently and quietly.

Published by
Mark Jansen Dean

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