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Learn About Some of The Common Causes for Your Dishwasher Not Draining: Tips from Robins Plumbing in Phoenix, Arizona 

A dishwasher that won’t drain can turn a convenient chore into a frustrating ordeal. If you’ve found yourself facing this issue, you’re not alone. Understanding the common causes of drainage problems can help you troubleshoot the issue effectively. At Robins Plumbing in Phoenix, Arizona, we’ve compiled a list of the most frequent reasons why your dishwasher may not be draining properly, along with helpful solutions. Let’s go through some of the common causes for your dishwasher not draining and some solutions that you can use to alleviate the problem.

1. Clogged Filter

 Explanation 

The filter is designed to catch food particles and debris, preventing them from clogging the drain. Over time, this filter can become clogged, which can impede water flow. 

Solution 

– Locate the Filter: Typically found at the bottom of the dishwasher, remove the filter according to the manufacturer’s instructions. 

– Clean the Filter: Rinse it under warm water to remove any accumulated debris. For stubborn grime, use a soft brush or sponge. 

 

2. Blocked Drain Hose

Explanation 

The drain hose connects your dishwasher to the home plumbing system. If it gets kinked, blocked, or damaged, it can prevent water from draining. 

 Solution 

– Inspect the Hose: Check for any visible kinks or bends. 

– Clear the Blockage: If you suspect a blockage, disconnect the hose and use a long brush or a plumber’s snake to remove any debris inside. 

 

3. Garbage Disposal Issues

Explanation 

If your dishwasher is connected to a garbage disposal, any issues with the disposal can affect drainage. A clogged disposal can back up water into the dishwasher. 

Solution 

– Check the Disposal: Run the garbage disposal to see if it drains properly.  

– Clear the Disposal: If it’s clogged, you may need to clear it out or consult with a professional plumber. 

 

4. Faulty Drain Pump

Explanation 

The drain pump is responsible for pushing water out of the dishwasher. If this component malfunctions, water will not be pumped out effectively. 

Solution 

– Listen for Sounds: If you hear a humming noise but no water is draining, the pump may be jammed or broken. 

– Inspect the Pump: Access the pump to check for obstructions. If it appears damaged, you may need to replace it, which is best handled by a professional. 

 

5. Air Gap Malfunction

Explanation 

An air gap is a plumbing component that prevents dirty water from siphoning back into the dishwasher.  Keep in mind that not everyone has one. If you do it will appear as a dome on the sink deck next to you’re kitchen faucet. 

Solution 

Confirm that the air gap is installed correctly and does not have any debris in it.  If the air gap is not installed correctly or has a blockage this can prevent your dishwasher from draining correctly. Often you’ll want to call out the pros for this.

Services in Phoenix & Beyond

When you’ve found yourself in need of 24 hour plumbing services in the Phoenix, Glendale, Scottsdale, or Chandler area, you can trust Robins Plumbing. We will provide you with prompt and expert care!  Contact our team today! In addition to our slab leak repairs, we also offer a variety of residential and commercial plumbing services, including: drain cleaning, water heater repair and replacement, sewer camera inspection and locating, backflow prevention, commercial and residential jetting, water treatments, and more. Visit our reviews online to see what others have to say about our local plumbing company!