Why Is My Dishwasher Not Draining?

Coming home to a dishwasher full of standing water is frustrating. Not only does it impact your routine, but it also poses a risk to your appliance's longevity. If you're asking, "Why is my dishwasher not draining?" You’re not alone.

This common household issue can arise for several reasons, ranging from simple clogs to more complex mechanical failures. Understanding the root cause and how to address it can save you time, money, and headaches.

In this blog, we’ll help you determine the potential cause, address it, and explore when it might be time to invest in a new, efficient dishwasher that better suits your needs.

How Do You Fix a Dishwasher That Is Not Draining?

To address why your dishwasher is not draining, we need to explore and fix common issues step by step. Here are some of the most common issues that lead to dishwashers not draining and how to fix them.

Check For a Clogged Dishwasher Filter

A primary reason for drainage issues is a clogged filter. Over time, food debris, grease, and other particles can accumulate, blocking water flow.

How to Fix: Remove the filter according to the manufacturer's instructions. Dishwasher filters are typically found at the bottom of the dishwasher. Rinse it thoroughly under running water. For stubborn debris, use a soft brush.

Regularly clean your dishwasher's filter to prevent this issue from occurring in the future.

Check For a Blocked Drain Hose

A drain hose connects dishwashers to a home's drainage system. These hoses can become kinked or clogged, preventing water from draining.

How to Fix: Check the hose for blockages by disconnecting and flushing it with a high-pressure water stream. Ensure it's not kinked or bent when you reconnect it.

Check The Garbage Disposal

If your dishwasher drains through a garbage disposal, a blockage in the disposal can back up your dishwasher.

How to Fix: Run your garbage disposal fully to clear any potential blockages. Do this regularly as part of routine kitchen maintenance to prevent issues in the future.

Ensure There Is No Air Gap Blockage

Some dishwashers are installed with an air gap to prevent sink backflow into the dishwasher. Food particles and debris can clog this air gap.

How to Fix: Remove the air gap cover near the kitchen faucet. If necessary, check for and clean out any debris using water or a brush.

Check For a Faulty Drain Pump

Drain pumps force water through the drain hose on dishwashers. If it's malfunctioning, it might not be able to pump water out.

How to Fix: Listen for unusual noises coming from the pump. If it seems faulty, it may need to be cleaned or replaced. Depending on your comfort level with appliance repair, this task might require a professional. We suggest reading your owner’s manual for instructions on how to check and repair your pump.

Run a Test Cycle to Troubleshoot

After addressing these common issues, run a test cycle to ensure the problem is resolved. If your dishwasher continues to have issues despite troubleshooting, it might be time to consult a professional for further diagnostics or consider upgrading to a new model.

When to Call a Professional

If you cannot fix the drainage issue or if your dishwasher is showing any of these signs, you may have a more serious problem that warrants expert intervention.

• Persistent drainage issues after basic troubleshooting.
• Water leakage around the dishwasher.
• Strange noises during operation that might indicate pump failure.

The Benefits of Upgrading Your Dishwasher

Sometimes, a dishwasher not draining is a sign that it's time for an upgrade. New dishwashers offer several advantages.

Enhanced Performance

Newer models boast improved technology for cleaner dishes, more cycles, and features like targeted sprays for heavily soiled items.

Get more tips on how to improve your dishwasher’s efficiency and longevity here.

Convenience and Hygiene

With features like soil sensors, auto-open doors to aid drying and NSF-certified sanitation cycles, new dishwashers offer convenience and hygiene that older models can't match.

Environmental Impact

Upgrading to a more efficient model reduces your utility bill and carbon footprint, aligning with more sustainable living practices. Shop Energy-Star-rated built-in dishwashers online today.

Peace of Mind

Investing in a new dishwasher means you’re less likely to face the same draining issues anytime soon, especially with warranty coverage and current technology.

Shop for Dishwashers at Howard's Appliance

If you are ready to purchase a new dishwasher, the experts at Howard’s Appliance can help you find the right replacement. We have various dishwashers, including built-in dishwashers, portable dishwashers, and dish drawers. Accessories and new garbage disposals are also available.

Visit one of our conveniently located appliance stores in Canoga Park, Murrieta, Corona, Covina, Riverside, and the surrounding area in Southern California today.

Commonly Asked Questions

Below, we have listed some of the top questions we are often asked about dishwashers and their maintenance at Howard’s. We have compiled a more detailed list of common dishwasher issues & solutions here.

How often should I clean my dishwasher filter?

It's recommended that the dishwasher filter be cleaned every month to prevent food particles and debris from clogging the system and maintain optimal cleaning performance.

Can I use regular dish soap in my dishwasher?

You should never use regular dish soap in your dishwasher as it can lead to sudden overflow. Always use detergents specifically designed for dishwasher use.

Why are my dishes not drying properly in the dishwasher?

Improper drying can result from several factors, including overloaded racks, using the eco-friendly drying setting (which uses less heat), or a malfunctioning heating element. Also, using a rinse aid can improve drying.

How can I improve my dishwasher’s efficiency?

Improving efficiency can be achieved by running full loads, ensuring the dishwasher is not overcrowded, using the proper detergent amount, and selecting energy-efficient cycles.

Is it necessary to pre-rinse dishes before loading them into the dishwasher?

Pre-rinsing is not usually necessary with modern dishwashers. Scraping off large food pieces is sufficient, as pre-rinsing can waste water, and modern dishwashers are designed to handle soil levels on dishes.

What should I do if my dishwasher starts making unusual noises?

Unusual noises indicate obstructed spray arms, a failing pump, or a foreign object stuck in the dishwasher. Check for visible blockages and consult the manual. If the problem persists, it may be time to call a professional.

What should I do to clean my dishwasher regularly?

To keep your dishwasher running smoothly and prevent future drainage issues, consider implementing these tips:

1. Regular Cleaning: Remove and clean the filter monthly to prevent clogging. Wipe the interior, edges, and seals with a damp cloth to remove grease and detergent buildups. See more detailed dishwasher cleaning instructions here.

2. Hot Water Runs: Periodically run the dishwasher on a hot water cycle without dishes to clean out any residue and ensure smooth operation.

3. Rinse Dishes: Although modern dishwashers can handle some food particles, rinsing heavy debris off dishes before loading them can significantly reduce the risk of clogs.

4. Inspect & Clean Spray Arms: Ensure the spray arms are free from obstructions and clean them regularly to maintain water flow and efficiency.

5. Use the Right Detergent: Opt for a high-quality detergent and use the recommended amount to avoid excess suds that can impair function.

6. Check and Clean Seals: Regularly inspect door seals for wear and tear to prevent leaks and ensure they're cleaned to maintain a secure closure.

7. Avoid Overloading: Ensure dishes are loaded according to the manufacturer's guidelines, allowing water and detergent to circulate freely.

These maintenance tips can help ensure your dishwasher operates efficiently for years, saving time and avoiding unnecessary repair costs.