Dishwasher Making Loud Noise? Causes and How to Fix It
Dishwashers are not completely silent, but if your appliance suddenly becomes much louder than usual, it can be a sign that something is wrong. Grinding, rattling, buzzing, or banging noises often indicate a blockage, worn component, or installation issue.
Identifying the source of the noise early can help prevent further damage and keep your dishwasher running efficiently.
In this guide we explain the most common reasons a dishwasher is making loud noises and how to fix them.
1. Spray Arms Hitting Dishes
One of the most common causes of noise is the spray arms hitting dishes or utensils inside the dishwasher.
If items are loaded incorrectly, they can block the spray arms as they rotate.
Signs this is the problem
- A repetitive knocking or clicking sound
- Noise occurs during the wash cycle
- Dishes are not positioned properly
What to do
- Open the dishwasher and check how items are arranged
- Ensure nothing is blocking the spray arms
- Spin the spray arms by hand to check for clearance
2. Loose Items Inside the Dishwasher
Small or lightweight items can move around during a cycle and cause rattling noises.
Common causes
- Loose cutlery
- Small lids or plastic items
- Items falling through racks
Solution
Make sure all items are secured properly and placed in the correct sections of the dishwasher.
3. Blocked or Damaged Spray Arms
If spray arms become blocked or damaged, they may not rotate smoothly, leading to unusual noises.
Signs
- Uneven cleaning results
- Grinding or clicking sounds
- Spray arms not spinning freely
Cleaning or replacing the spray arms can resolve the issue.
If your dishwasher is also not cleaning properly, see your guide on dishwasher not cleaning properly – causes and fixes.
4. Debris in the Drain Pump
Food particles, glass fragments, or debris can sometimes enter the drain pump and cause grinding or buzzing noises.
Symptoms
- Grinding noise during draining
- Dishwasher not emptying fully
- Unusual sounds at the end of the cycle
What to do
- Turn off and unplug the dishwasher
- Check the filter and pump area
- Remove any debris carefully
If water is also left behind, see your guide on dishwasher not draining – causes and fixes.
5. Worn Pump or Motor
Over time, the dishwasher’s pump or motor may wear out, leading to louder operation.
Signs of wear
- Constant humming or buzzing
- Noise getting worse over time
- Reduced performance
Replacing a worn pump or motor may be necessary.
6. A Faulty Circulation Pump
The circulation pump pushes water through the spray arms during the wash cycle.
If it becomes faulty, it may produce unusual noises.
Possible symptoms
- Loud humming during washing
- Reduced water pressure
- Poor cleaning results
7. Dishwasher Not Installed Correctly
If the dishwasher is not installed securely, it may vibrate or move slightly during operation, causing noise.
What to check
- The appliance is level
- It is properly secured under the counter
- There is no contact with surrounding cabinets
How This Relates to Other Dishwasher Problems
Noise is often linked to other issues.
For example:
- If your dishwasher is noisy and not cleaning properly, see dishwasher not cleaning properly – causes and fixes
- If the noise occurs during draining, read dishwasher not draining – causes and fixes
When Replacement Parts May Be Needed
If cleaning and adjustments do not resolve the issue, some components may need replacing.
Common parts linked to noise problems include:
- spray arms
- drain pumps
- circulation pumps
- motors
Replacing worn components can help restore quiet operation.
You can find replacement dishwasher spare parts for many appliance brands from Yourspares.
Preventing Dishwasher Noise
Regular maintenance can help keep your dishwasher running quietly.
Helpful tips
- Load dishes correctly
- Clean the filter regularly
- Check spray arms for blockages
- Remove debris from the appliance
- Ensure proper installation
Final Thoughts
If your dishwasher is making loud noises, the cause is often something simple such as blocked spray arms or loose items inside the machine. By checking these common issues first, you can often fix the problem quickly.
If the noise is caused by a worn component, replacing the correct part can restore your dishwasher and improve performance.
Comments