A malfunctioning dishwasher can be frustrating, especially when you discover a pool of standing water at the bottom after a cycle. Fortunately, most issues causing a dishwasher not to drain are easy to diagnose and fix on your own. In this comprehensive guide, we will walk you through the common causes of drainage problems and solutions that can restore your dishwasher to proper working order.

If you live in the Plano, TX, area and your efforts to fix the issue don’t resolve it, you can always rely on Chrome Heating Air Conditioning for professional service. Now, let’s dive into the steps to troubleshoot a dishwasher that won’t drain.

Common Causes of a Dishwasher Not Draining

Several factors can cause your dishwasher to stop draining. Understanding these potential causes can help you identify the issue more quickly. Below are the most common culprits:

1. Clogged Drain Hose

The drain hose is responsible for carrying wastewater from your dishwasher to your home’s drainage system. Over time, food particles, grease, and debris can build up in the hose, causing a clog. If your dishwasher isn’t draining, the first thing to check is the drain hose.

2. Blocked Garbage Disposal

If your dishwasher is connected to a garbage disposal, a clogged or unemptied disposal can prevent the dishwasher from draining properly. It’s a good idea to run your garbage disposal before running the dishwasher to ensure that the pathway is clear.

3. Dirty Filter

Many dishwashers have a filter located at the bottom of the machine, which catches food particles and debris. If this filter becomes clogged, it can restrict water from draining out of the appliance. Regular cleaning of the filter is essential for keeping your dishwasher functioning correctly.

4. Faulty Drain Pump

The drain pump forces water out of the dishwasher and into the drain line. If the pump is malfunctioning or has failed altogether, it may prevent the dishwasher from draining. This problem may require a professional technician to diagnose and fix.

5. Kinked Drain Hose

In some cases, the drain hose may become kinked or bent, restricting the flow of water out of the dishwasher. Inspecting the hose for any bends or blockages can resolve the issue.

6. Air Gap Blockage

Some dishwashers are equipped with an air gap, which prevents dirty water from flowing back into the dishwasher. If the air gap becomes blocked or clogged, it can cause drainage issues. Cleaning the air gap can resolve this problem.

How to Fix a Dishwasher That Won’t Drain

Now that we have identified some common causes, let’s look at the steps you can take to fix the issue. Keep in mind that some repairs may require professional assistance if you are not comfortable handling plumbing or electrical components.

Step 1: Remove Standing Water

Before you begin troubleshooting, it’s important to remove the standing water from the bottom of the dishwasher. You can do this using a sponge or a cup to scoop out the water. Removing the water will make it easier to inspect the interior components and perform any necessary repairs.

Step 2: Clean the Filter

The filter is often the culprit when a dishwasher won’t drain. To clean it:

Locate the Filter: It is typically located at the bottom of the dishwasher, under the spray arm.
Remove the Filter: Some filters twist off, while others have screws holding them in place. Refer to your dishwasher’s manual for instructions.
Clean the Filter: Rinse the filter under warm water, using a soft brush to remove any food particles and debris.
Replace the Filter: Once clean, secure the filter back in place.

Cleaning the filter should be part of your regular dishwasher maintenance to prevent future drainage issues.

Step 3: Inspect the Drain Hose

A clogged or kinked drain hose is another common cause of a dishwasher not draining. To inspect it:

Disconnect the Power: Ensure the dishwasher is unplugged from the power source before proceeding.
Check the Hose for Kinks: Inspect the entire length of the hose for any bends or kinks that may be restricting water flow.
Clear Any Clogs: If the hose is clogged, try using a straightened wire hanger or a plumber’s snake to remove the debris. You can also detach the hose and run water through it to clear out any blockages.

Once you’ve cleared the hose, reattach it and test the dishwasher to see if the issue is resolved.

Step 4: Clear the Garbage Disposal

If your dishwasher is connected to a garbage disposal, ensure the disposal is free of any clogs. Run the disposal with water to clear out any debris that could be preventing proper drainage. Additionally, if your garbage disposal was recently installed or replaced, make sure the knockout plug has been removed. This plug blocks the dishwasher drain connection and must be removed to allow water to drain.

Step 5: Clean the Air Gap

If your dishwasher has an air gap, it’s important to check it for blockages. To clean the air gap:

Locate the Air Gap: It is usually a small cylindrical fixture near the sink faucet.
Remove the Cap: Twist off the cap or pull it off, depending on the model.
Clear Debris: Use a small brush or a pipe cleaner to remove any debris or blockages from the air gap.

Once cleaned, replace the cap and test the dishwasher.

Step 6: Test the Drain Pump

If none of the previous steps resolve the issue, the drain pump may be the problem. Testing or replacing the drain pump may require the assistance of a professional. The pump is located underneath the dishwasher, and accessing it involves disconnecting the appliance from its power and water supply. A technician can use a multimeter to test the pump for continuity and determine if it needs to be replaced.

Step 7: Check the Dishwasher’s Timer or Control Board

If your dishwasher’s timer or control board is malfunctioning, it may not signal the drain pump to activate during the drainage cycle. These components are more complex to diagnose and repair, so if you suspect an issue with the timer or control board, it’s best to consult a professional.

When to Call a Professional

While many dishwasher drainage issues can be resolved with DIY methods, there are times when you’ll need the help of a professional. If you’ve gone through the troubleshooting steps and your dishwasher still won’t drain, it’s time to call in the experts.

Chrome Heating Air Conditioning offers reliable and professional appliance repair services in Plano, TX. Their team of experienced technicians can quickly diagnose the problem and provide the necessary repairs to get your dishwasher working again.

Preventing Future Drainage Issues

To prevent your dishwasher from experiencing drainage issues in the future, consider the following maintenance tips:

Clean the Filter Regularly: Make it a habit to clean the filter at least once a month to prevent clogs.
Rinse Dishes Before Loading: While dishwashers are designed to handle food particles, rinsing off large debris before loading can reduce the chances of clogs.
Run Hot Water Before Starting a Cycle: Running hot water in the sink for a few seconds before starting the dishwasher helps ensure proper drainage.
Use a Dishwasher Cleaner: Use a dishwasher cleaner once a month to remove grease and buildup inside the machine.

By performing regular maintenance and following these tips, you can keep your dishwasher in optimal working condition and avoid future drainage problems.

Conclusion

Dealing with a dishwasher that won’t drain can be frustrating, but with a bit of troubleshooting, you can often resolve the issue on your own. If you’ve tried all the steps outlined above and the problem persists, it’s time to call Chrome Heating Air Conditioning in Plano, TX, for professional help. Their expert technicians can provide the assistance you need to get your dishwasher back in working order.

FAQ

Why is my dishwasher not draining properly?
Common reasons include clogged filters, a blocked drain hose, or issues with the garbage disposal.
How can I check if the dishwasher drain is clogged?
You can inspect the dishwasher filter, drain hose, or garbage disposal for debris buildup that might be causing the blockage.
What should I do if my dishwasher drain hose is blocked?
Detach the drain hose from the dishwasher and the sink, then flush it with water to clear any obstructions.
Can I fix a dishwasher that won’t drain by cleaning the filter?
Yes, a dirty or clogged filter can prevent proper drainage. Cleaning it regularly can resolve the issue.
Is a faulty dishwasher pump a common reason for drainage problems?
Yes, the pump can malfunction and prevent water from draining. It might need to be cleaned or replaced.
How do I reset my dishwasher if it won’t drain?
Check the user manual for specific instructions on resetting your model, but many dishwashers have a reset button or sequence to follow.
Could a garbage disposal issue cause my dishwasher to not drain?
Yes, if the garbage disposal is clogged, it can block the dishwasher’s drain. Cleaning the disposal may resolve the problem.
When should I call a professional for a dishwasher that won’t drain?
If you’ve tried cleaning the filter, drain hose, and garbage disposal but the issue persists, it’s time to call a professional.
Can using the wrong detergent cause drainage problems?
Yes, using too much or the wrong type of detergent can create excessive suds, leading to poor drainage.
How do I prevent my dishwasher from draining in the future?
Regularly clean the filter, use the correct detergent, and check the garbage disposal and drain hose for blockages to prevent future issues.