What is the most common cause for a dishwasher not to drain?

• <div><p>If your dishwasher isn’t draining, some common causes include a clogged drain filter, drain hose, or air gap. Also, if you have a garbage disposal, a clog in the disposal can back up your dishwasher since they share plumbing, as can a clog in your kitchen sink’s plumbing. A handy DIYer may be able to figure out <a href="https://www.angi.com/articles/how-to-unclog-dishwasher.htm">how to unclog a dishwasher,</a> but you may need to call in a plumber if you can’t locate and clear the clog yourself.</p></div>

Why does a dishwasher have to drain through the sink plumbing?

• <div><p>Any drain in your house requires a water trap to prevent sewer gases from entering the home. Dishwashers don’t have an internal water trap, so they must use an external P trap. The most convenient P trap for the dishwasher is already in the plumbing under your sink.</p></div>

What are some signs your dishwasher filter is dirty?

• <div><p>Some common signs you have a dirty dishwasher filter are:</p><ul><li><p>Food sticking to your dishes even after a thorough wash cycle</p></li><li><p>Odor coming from your dishwasher</p></li><li><p>Stains left on dishes and utensils</p></li><li><p>Water pooling in your dishwasher</p></li><li><p>Food stuck to parts of the dishwasher, like the racks, walls, or sprayer arm</p></li></ul><p></p></div>

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Verified Reviews for Dishwasher Installation pros in Naperville, IL

*The Angi rating for Dishwasher Installation companies in Naperville, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Dishwasher Installation needs.

*The HomeAdvisor rating for Dishwasher Installation companies in Naperville, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Dishwasher Installation needs.

Last update on April 30, 2026

Reviewed in April 2026
John came on time for the job as he said he would; finished the job within an hour and cleaned up so well as if there was nothing done in the kitchen until you see the work that he has done which is to take out 2 tiles so my new dishwasher can be installed. John will be back to install new...
Alpha Tile
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Reviewed in February 2026
Ellis did a great job changing the wood under our dishwasher and a few other small jobs. He provided videos to show the damage. He was on time and very professional. We would recommend him highly.
Erols Construction
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Reviewed in December 2023
Was very informative with all my question and my dishwasher feels brand new.
Appliance Rescue Service
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Reviewed in February 2023
We consider ourselves absolutely lucky to have found Dave Proctor. He knows his stuff, is ready to answer all questions, and was able to assess and correct the dishwasher problem quickly. On top of all that, he is delightful to talk with. We will recommend him to all our friends and neighbors.
Partsworxs Home Services
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Reviewed in November 2021
Darrell did excellent work installing a new outlet for the dryer. Installation and cleanup very well done
All About Electric
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Reviewed in October 2021
Steve installed our new chandelier and outdoor porch lights. He was very knowledgeable and the installation was quick and well done. Will definitely hire again when needed!
EMF Electric
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Reviewed in May 2021
I hired Wiz Plumbing to install a new faucet, a new garbage disposal, three shut-off valves and new sink and dishwasher drain lines. Blendi, the installer, showed up on time and quickly went to work on the job. Everything was done professionally. completely and correctly. I would have no...
Wiz Plumbing
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Reviewed in December 2020
Melvin Flores is a consummate professional. He called to let me know when he was on his way to my home. When he arrived he was very polite. He explained the problem I was having with my dishwasher and fixed it efficiently. I highly recommend him for appliance repair (my only experience...
Melvin Flores
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Reviewed in February 2020
Hung my door and installed a rack in our dishwasher
Silver Hammer Construction
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Reviewed in October 2019
Tommy is awesome. Did a great job installing the new dishwasher, and gave me good advice about fixing some electrical problems and aligning the doors on our new refrigerator. Both problems are now fixed. Highly recommended!
Mr. Handyman of Wheaton-Hinsdale
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Dishwasher Installation questions, answered by experts

If your dishwasher isn’t draining, some common causes include a clogged drain filter, drain hose, or air gap. Also, if you have a garbage disposal, a clog in the disposal can back up your dishwasher since they share plumbing, as can a clog in your kitchen sink’s plumbing. A handy DIYer may be able to figure out how to unclog a dishwasher, but you may need to call in a plumber if you can’t locate and clear the clog yourself.

Leaks, poor drainage, failure to start, water not heating, and excessive noise frequently require service.

Any drain in your house requires a water trap to prevent sewer gases from entering the home. Dishwashers don’t have an internal water trap, so they must use an external P trap. The most convenient P trap for the dishwasher is already in the plumbing under your sink.

Some common signs you have a dirty dishwasher filter are:

Food sticking to your dishes even after a thorough wash cycle
Odor coming from your dishwasher
Stains left on dishes and utensils
Water pooling in your dishwasher
Food stuck to parts of the dishwasher, like the racks, walls, or sprayer arm

The average cost to repair a dishwasher that’s leaking is $200, but your total will depend on the underlying problem. Having a professional replace a faulty door gasket or a gasket in a supply line could cost as little as $50, while replacing a leaking dishwasher pump could total as much as $600.

The Naperville, IL homeowners’ guide to dishwasher installation services

From average costs to expert advice, get all the answers you need to get your job done.

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