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HomeRepair HelpBosch Dishwasher RepairBosch Dishwasher making noise Repair
My Bosch Dishwasher is Making Noise
If your Bosch dishwasher is making noise, start with the parts most likely to cause a dishwasher loud noise, humming noise, or grinding noise during the cycle. The first thing to check is the drain pump, since debris caught in the pump can make a Bosch dishwasher making noise and a worn pump can stay noisy even after it is cleared. Next, inspect the circulation pump, because failing motor bearings often cause a steady droning or buzzing sound. After that, look at the drain impeller, which pushes water through the drain hose, and then the pump and motor assembly, where bad bearings, a damaged drain impeller, or a worn wash impeller can all create noise. A broken or warped wash impeller can also scrape the pump housing and cause a dishwasher grinding noise. On some models, the circulation and drain pump motor itself may be the problem if the bearings are worn out. Enter your Bosch dishwasher model number on RepairClinic.com to find the exact replacement drain pump, circulation pump, wash impeller, drain impeller, or pump and motor assembly for your machine.
01 - Bosch Dishwasher Drain Pump
First, check the drain pump to ensure that it is clear of debris. If the drain pump is clean but it is still noisy, replace it.
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02 - Bosch Dishwasher Circulation Pump
The circulation pump motor has bearings that wear out over time. When the motor bearings fail, they generate a continuous drone. If the motor bearings have failed, you must replace the entire circulation pump.
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03 - Bosch Dishwasher Drain Impeller
The drain impeller pushes water through the drain hose and into the garbage disposer or drain line. If the impeller is broken, replace it.
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04 - Bosch Dishwasher Pump and Motor Assembly
Part of the pump and motor assembly (such as the motor bearings, drain impeller, or wash impeller) might be defective. Often, you can replace the pump’s individual parts. However, if you do not want to disassemble the pump to replace its parts, or if the parts are not available separately, you can replace the entire pump and motor assembly.
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05 - Bosch Dishwasher Wash Impeller
The wash impeller is a small plastic blade that forces water through the spray arms. If one or more of the impeller blades is broken, the dishwasher will make noise. In addition, if the impeller is damaged, warped, or bent, it can scape against the pump housing. Inspect the wash impeller for damage. If the wash impeller is damaged, replace it. On most models, you can replace the wash impeller independently of the pump and motor assembly. Search for your model number to determine if your impeller is replaceable. If the impeller cannot be replaced separately, you will have to replace the entire pump and motor assembly.
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06 - Bosch Dishwasher Circulation and Drain Pump Motor
The circulation pump motor has bearings that wear out over time. When the motor bearings fail, they generate a continuous drone. If the motor bearings have failed, replace the motor or replace the entire pump and motor assembly.
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Frequently Asked Questions
Why is my Bosch dishwasher making a loud humming or droning noise?
What causes a Bosch dishwasher grinding noise during the cycle?
How do I tell if the drain pump or circulation pump is causing the noise?
Should I replace the Bosch dishwasher pump and motor assembly right away?
How do I find the correct Bosch dishwasher noise-related part for my model?
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