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>

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Verified Reviews for Dishwasher Installation pros in La Mirada, CA

*The Angi rating for Dishwasher Installation companies in La Mirada, CA 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 La Mirada, CA 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 September 24, 2026

Reviewed in September 2026
Hired to replace bathroom exhaust fan, install wall shelf, and install floodlight security cam. Very polite and nice person. Will be hiring again in the future for future projects. Thanks Joseph!!
Skillful Joe - Unlicensed Contractor
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Reviewed in July 2026
He was great! Came same day and had my dishwasher up and running in no time. Cleaned the parts before putting back together. I would definitely use him again!
HomeFix Appliance Repair Inc
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Reviewed in May 2025
Christopher did a fantastic job on a plumbing and install for my dishwasher. He's a professional who you can trust. I have already recommended him to many people because he will honor your name.
Pisces Plumbing
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Reviewed in November 2024
I hired them to install a new sink for me, and they did such an amazing job. A very kind young man did the work very quickly!
Water Leak Inspection
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Reviewed in April 2023
Don did a great job!! The install was clean and everything works perfectly.
Sysopco
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Reviewed in August 2022
Knowledgeable salesman and installer. Good customer service. Good follow-up. All personnel friendly.
Brighter Concepts, Inc.
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Reviewed in April 2022
Alex installed my water heater and was very professional and pleasant. His rates were affordable and the installation was smooth and looked very clean. Would definitely recommend!
Bonaventure Maintenance - Unlicensed Contractor
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Reviewed in January 2022
Jesus the technician/installer did a great, neat, professional replace and install of my old water heater. Excellent work. First contact with Joaquin and his assistant Gilbert who set up the requirements for the job also did stellar work.
ARS / Rescue Rooter LA East
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Reviewed in January 2022
Extremely professional and clean installation!!
Hague Quality Water
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Reviewed in October 2021
Clean installation, quick and great that they worked with my schedule for the installation and the follow up. Clean, straightforward good business manners.
CPR Home Solutions, Inc.
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Dishwasher Installation questions, answered by experts

Common issues include drainage problems, faulty doors, inconsistent cleaning performance, unresponsive controls, or unusual noises.

Most repairs take 1-3 hours, but complex issues requiring part replacements may take longer if parts need to be ordered.

Installation includes leveling the unit, connecting water and electrical lines, securing the unit, and testing for function and leaks.

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.

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.

The La Mirada, CA 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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