Dishwasher Making Noises? All the Easy Fixes You Need to Know
From the low hum of the motor to water rushing around inside, it’s not uncommon for dishwashers to make some sound throughout a cycle. However, if you start to notice your dishwasher is making new sounds or has become louder over time, this might be a sign that there’s an issue with one or more of its parts. There might be a part that isn't functioning properly, or your dishwasher might be improperly fastened to the cabinet or floor. Our friends at Sears PartsDirect have some suggestions on how you can troubleshoot and fix a dishwasher that’s making too much noise.
Replace the Pump and Motor Assembly
There are many different reasons why a pump and motor assembly might not be running properly, and any of them could be responsible for those loud or strange noises. If your dishwasher has a damaged impeller or pump housing, this could cause the motor to fail to produce adequate water pressure through your dishwasher’s spray arms. If the motor on the circulation pump fails entirely, your dishwasher may fail to run at all. Seals inside could also deteriorate over time, which could also cause your dishwasher to leak. In any of these scenarios, it’s best to replace the pump and motor assembly.
Learn more about replacing a dishwasher pump and motor assembly from Sears PartsDirect.
Examine the Dishwasher Drain Pump
First, check the drain hose, sink drain and sump to ensure nothing is blocked. If the path is clear yet your drain pump is continually failing to pump out water, the pump has failed. If you notice that your drain pump has visible signs of damage including cracks or dents, or if it has failed, it needs to be replaced.
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Learn more about replacing a dishwasher drain pump from Sears PartsDirect.
Replace the Water Inlet Valve
Also known as the solenoid fill valve, the water inlet valve is responsible for flowing water into the dishwasher throughout a cycle. If the water inlet valve is making more noise than usual, it’s a sign that this component could be failing to properly open at the right time (in this case, the water level will be noticeably low during a cycle). If the water inlet valve is not opening correctly, it needs to be replaced.
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Learn more about replacing a dishwasher water inlet valve from Sears PartsDirect.
Replace the Diverter Motor
The diverter motor helps water move through your dishwasher’s upper spray arms by moving the diverter disc into the correct position. If the diverter motor has failed, the dishwasher should signal an error code. If this occurs, the diverter motor needs to be replaced. The diverter motor can become damaged if the seal has deteriorated and has allowed water to leak through. Replace the diverter motor seal if there are any visible signs of damage or leakage.
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Learn more about replacing a dishwasher diverter motor from Sears PartsDirect.
Examine the Chopper Blade Area
If any loose food particles left on your dishes or silverware fall into the chopper blade section of your dishwasher, it can create a loud grinding noise during a cycle. To access the chopper blade area, remove the lower spray arm and upper part of the sump, and make sure the area is clear of anything that might be stuck. If the chopper blade has become damaged due to excessive grinding, it should be replaced.
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Examine and Clean the Circulation Pump
Any loose debris such as leftover food particles can make their way into the circulation pump. This may result in a loud grinding noise, and it might also affect your dishwasher’s ability to transfer water through the pump and sump area during a cycle. Locate the circulation pump and clean it thoroughly of any trapped debris. If you notice visible signs of damage to your circulation pump while cleaning, it should be replaced.
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Replace the Wash Pump Motor
The wash pump motor is responsible for spinning the wash pump impeller under the dishwasher tub. A defective wash pump motor may result in decreased spray pressure, which may not clean your dishes properly. If your wash pump motor is defective, it may also be making a loud noise. In this case, your wash pump motor as well as the corresponding water seals should be replaced.
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Examine the Upper Pump Assembly
There are a lot of reasons why your upper pump assembly might be making noise. Anything from a clog or trapped debris to a deteriorated seal or a bad check valve could cause your upper pump assembly to improperly operate or fail to drain water from the tub. To examine the pump components, remove the lower spray arm and the top of the sump area in your dishwasher tub, and make sure this area is clean and clear.