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HomeRepair HelpThermador Dishwasher RepairThermador Dishwasher making noise Repair
Thermador Dishwasher making noise
If your Thermador dishwasher is making noise, start with the parts most likely to cause it. A dishwasher making noise often points first to a drain pump clogged with debris or a drain pump that has simply worn out. Next, check the circulation pump, since failing motor bearings can cause a steady droning sound. After that, inspect the drain impeller, which pushes water through the drain hose, because a broken impeller can get loud fast. The pump and motor assembly is another common source if the motor bearings, drain impeller, or wash impeller are damaged. A bad wash impeller can also scrape the pump housing and create grinding or rubbing sounds, and on some models the circulation and drain pump motor itself may be the issue if its bearings are failing. If your Thermador dishwasher has a loud noise, grinding noise, buzzing noise, or humming noise, matching the sound to the part helps narrow the repair. Enter your model number on RepairClinic.com to find the exact Thermador replacement part for your dishwasher, whether you need a drain pump, circulation pump, drain impeller, wash impeller, or complete pump and motor assembly.
01 - Thermador 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 - Thermador 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 - Thermador 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 - Thermador 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 - Thermador 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 - Thermador 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 Thermador dishwasher making a loud humming or droning noise?
How do I tell if the drain pump is causing my Thermador dishwasher noise?
Can a broken wash impeller or drain impeller make a Thermador dishwasher loud?
Should I replace the pump and motor assembly if my Thermador dishwasher is noisy?
How do I find the right replacement part for my Thermador dishwasher noise problem?
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