It’s always worrying when an appliance starts to make a strange sound, but don’t panic! Our easy-to-follow article will help you to identify what the weird noise from your dishwasher means, and how you can fix the problem.
A beeping usually means that your dishwasher is trying to indicate that it is experiencing an error. Check the display panel to see if an error code is being displayed. You can consult your user manual to see what the error code means and how it can be solved.
There are a couple of different causes of a dishwasher making a grinding noise.
The chopper blade of the dishwasher is there to cut up debris to allow it to go through the drain without causing blockages to your pipes. Occasionally, a hard piece of food such as a nut or a popcorn kernel, or a bit of non-food debris like a piece of broken crockery can get stuck in the chopper mechanism.
To fix this:
A dishwasher running with insufficient water can also cause it to make a grinding noise. To check this, try opening your dishwasher at the beginning of the wash cycle after it has finished filling. If there is very little water, the issue is likely with one of the following two parts:
The overflow protection float signals to the dishwasher when it has filled with sufficient water. If something like a dropped utensil is obstructing the float, it could be preventing your dishwasher from filling.
To check if this is the problem:
The water inlet valve opens and closes to allow water into the dishwasher. Over time, the part can start to degrade, which will initially make a high-pitched sound and can progress to a knocking or grinding sound. If the valve is damaged, you will need to order a replacement part as they can’t be repaired.
To access the inlet valve:
This usually indicates a problem with the circulation pump, namely that the bearings are worn out. If this is your issue, you will have noticed that your dishes are not being washed properly. If the circulation pump is the problem, it will need to be replaced. You can order a replacement part from your dishwasher manufacturer.
To replace the circulation pump:
There are two main reasons a dishwasher might make a knocking sound when it runs.
If your dishwasher is stacked incorrectly, the knocking sound will be caused by the spray arm hitting the utensils as it spins. This is a very easy fix – simply ensure that the spray arms are able to fully rotate before you begin your wash cycle. You may need to make sure you position the larger items at the edge of the dishwasher so that they do not obstruct the spray arms.
Make sure to check the spray arm at the bottom of the machine too – sometimes part of a dish or utensil can be sticking through the rack and preventing the bottom spray arm from spinning.
If your drain hose is not secured properly, when the dishwasher is draining it can move around and thump against the side of the machine as the water goes through it. This is another easy fix – you can simply use cable ties to secure the hose and eliminate the problem.
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