Bosch Dishwasher Groaning Noise- How to Fix

Bosch dishwasher
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Troubleshooting your Bosch dishwasher that is associated with groaning noise is essential for smooth operation. Yes, operating with a dishwasher that makes louder noise may be hectic when washing your utensils. It can hinder you from washing the kitchen utensils during the night in fear of waking up your neighbors. Besides, you might be also sleeping, enjoying your sleep, and then it’s cut short with the noise emanating from the dishwasher.

However, you need to understand that some noises are common and should not worry you when running the dishwasher. Be attentive only when the groaning noise becomes louder and more persistent than your ears are used to. Use our knowledge to troubleshoot your boring dishwasher.

Why is my Bosch dishwasher making noise?

bosch dishwasher groaning noise

One of the major reasons why you hear noises from a dishwasher is due to pump defects. Based on the part selected, a pump plays a vital role in the dishwasher as it is used to pressurize the arms of the spray. However, in some dishwashers, the pump may be useful in draining water.

In case you don’t understand the location of the dishwasher pump, try checking at the bottom part of the unit. Mostly the pump can be located in between the two compartments. Under this scenario, one of the compartments is always meant for washing or circulation while the other is useful for draining.

Inside the circulation chamber, you may find filter components and the wash impeller. On the other hand, you should expect to meet a chopper blade and the drain impeller inside the draining chamber. Remember, these impellers operate with the electric motor that is connected to the side or bottom part of the dishwasher pump.

Therefore, to determine whether the dishwasher pump is in good working condition, it’s advisable to use a multimeter. Such an instrument is always great for measuring electric current, resistance, and voltage.

Check the Multimeter I use, From Amazon.

Testing your Dishwasher’s pump

Bosch Dishwasher Pump

Before you do anything with your dishwasher, you are supposed to disconnect it from the electric source. Unplug it and then detach it from the power outlet and then detach the pump from the unit via the lower access panel. Now, install the probes on the pump’s terminals and place the multimeter on the Rx1.

Based on the Part Select, the measuring device (Multimeter) must read zero before kicking off the process. You are also allowed to continue with the process when the device reads anything close to zero. When testing the ground connection, you should install either probe onto the terminal while holding the other probe to the pump’s bare metal house.

You should not expect any reading and if the readings aren’t similar, prepare to go for a replacement; replace the pump.

Washing bearing ring and wash arm seal

Washing Bearing Ring

Apart from troubleshooting the problematic dishwasher pump, you are also supposed to check at the bearing ring or the wash arm seal. In reference to the Part Select, all these components are plastic and are always responsible for supporting the spray arm or the wash arm; where the arm revolves.

Inspect these parts to ensure that they are not worn out or loose, the spray arm will be problematic if these components are faulty. Now, after locating the wash arm spray seal and the bearing ring, carefully check them for symptoms of cracking, damage, or wear. For your information, these components are simply found on the wash/spray arms.

If it happens that after the inspection you find any piece with issues, chances could be that they’re requesting a replacement. Doing so may reduce too much noise from the dishwasher.

Inspecting the spray arms

Spray Arms

A faulty spray arm is another problem that might be making your Bosch dishwasher groan while in operation. In reference to Part Select, the dishwasher’s water is always forced out via the spray arms. Remember, these spray arms are responsible for spraying water in the dishwasher.

You should know that all the dishwashers are equipped with lower spray arms; it doesn’t matter with whatever model you’re using. Mostly, these components are situated at the dishwasher’s bottom par. On the other hand, we have some models that come with upper and middle spray arms. These spray arms are located beneath the top dish rack; which is on the dishwasher tub.

Experts recommend disconnecting the appliance from the power source manually and rotating the spray arms. The important thing here is to ensure both arms are spinning freely without hitting racks either, you need to ensure the spray arms aren’t spinning wobbly.

Additionally, the next step will be to investigate if the arms have wear, cracks, or damages. In case you locate any complications with your Bosch dishwasher spray arms, replacement is the best solution to restore the normal performance of the unit.

Replace the worn out parts

After you have tried all the above steps and your Bosch dishwasher still misbehaves, the next thing will be to replace the worn-out components. Under this stage, if you don’t know how to replace the component, we recommend dedicating the job to an expert. Failure to do so may worsen the situation; making the Bosch dishwasher groan involuntarily.

If you have the habit of leaving water in the unit without screening, be ready for louder noise from the dishwasher. Draining water from your appliance is advisable to ensure the impeller is clean and free. Failure to do so may trigger groaning noise emanating from your Bosch dishwasher when starting it up. The worst of it is when you go to bed and while drifting off, the appliance’s noises keep increasing.


  • Are Bosch Dishwashers worth buying?

Before hitting the road to the market, you need to understand that Bosch dishwashers are expensive compared to typical models on the market. This is because they’re packed with a lot of elegant features, making them well-rounded machines. Therefore, if you want a dishwasher that delivers 30% extra loading capacity, then the Bosch dishwasher can be the real deal. Cleaning this device is also straightforward and even the operation is quiet.

  • What is the average life expectancy of a dishwasher?

The average lifespan of a modern dishwasher is approximately 6-10 years. Over time, major components like the motor or pump may wear out, and out-of-warranty repairs can easily run $400-$600 or more once parts, labor, and trip costs are calculated

  • Where Bosch dishwashers are made in 2020?

Almost all Bosch dishwashers are made in the USA except for a few Bosch Benchmark units that are made in German.


It’s clear that troubleshooting your groaning Bosch dishwasher involves carrying out a thorough appliance inspection to determine common noises. These washing machines are sensitive whenever one of the components is worn out. Some of these parts are pumps and spray arms. All the parts have a critical role to play and a failure in one means that the entire functioning of the unit will be hindered.

Hopefully, our guide was of great help to you since it has more than enough information to fix minor faults with your Bosch dishwasher. Remember, some of the noises are normal, you shouldn’t worry about them. But, now when the issue becomes persistent, don’t strain yourself; seek the help of an expert.

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