Common Reasons Why Your Dishwasher May Not Be Draining Properly

Having a dishwasher that doesn’t drain can be a frustrating and inconvenient problem. It can leave your dishes dirty and your kitchen smelling unpleasant. But don’t panic! There are several potential reasons why your dishwasher may not be draining properly, and most of them can be easily resolved.

One common cause of a dishwasher failing to drain is a clogged or blocked drain hose. Over time, food particles, soap scum, and other debris can build up in the hose and prevent water from flowing out. To determine if this is the issue, you can try disconnecting the drain hose and checking for any blockages. If you find any, simply remove them and reconnect the hose. This simple maintenance task can often solve the problem.

Another possible reason for a dishwasher not draining properly is a malfunctioning pump. The pump is responsible for pumping water out of the dishwasher after each cycle. If it is not working correctly, water may remain in the dishwasher. To check if the pump is the issue, you can try manually activating it using the dishwasher’s control panel or by turning the impeller with a utensil. If the pump is indeed malfunctioning, it may need to be repaired or replaced.

It’s also worth checking the dishwasher’s filter for any obstructions. The filter is designed to catch food particles and prevent them from clogging the drain and pump. Over time, the filter can become clogged itself and hinder drainage. To clean the filter, remove it from the dishwasher and rinse it under running water. If it is heavily soiled, you may need to use a brush or sponge to remove the debris. Once clean, reinstall the filter and see if it improves drainage.

In some cases, a dishwasher that doesn’t drain may be a sign of a more serious issue, such as a faulty drain valve or a blocked air gap. If you have tried the above solutions and are still experiencing drainage problems, it may be best to contact a professional technician for further diagnosis and repair.

In conclusion, a dishwasher that doesn’t drain can be a nuisance, but it is usually a problem that can be fixed with a bit of troubleshooting. By checking the drain hose, pump, filter, and other components, you can often identify and resolve the issue yourself. If all else fails, don’t hesitate to seek professional help to get your dishwasher back in working order.

What to Do If Your Dishwasher Doesn’t Drain?

Having a dishwasher that doesn’t drain can be frustrating and inconvenient. However, there are several troubleshooting steps you can take to try and fix the issue before calling a professional technician. Here’s what you can do:

  1. Check for clogs: Start by inspecting the dishwasher’s drain basket and filter. Remove any accumulated debris, such as food particles or broken glass, that may be causing a blockage.
  2. Clear the air gap: If your dishwasher is equipped with an air gap, make sure it’s not blocked. Remove the cap and clean any debris that may have accumulated inside.
  3. Inspect the drain hose: Ensure that the drain hose is properly connected and not kinked or clogged. Straighten any kinks and clear any obstructions if necessary.
  4. Check the garbage disposal: If your dishwasher is connected to a garbage disposal, make sure it’s not clogged. Run the disposal to clear any potential blockages.
  5. Test the drain valve: The drain valve controls the flow of water through the dishwasher’s drain hose. If the valve is faulty, it may prevent proper drainage. Use a multimeter to test the valve for continuity. If it’s defective, consider replacing it.
  6. Inspect the drain pump: The drain pump is responsible for removing water from the dishwasher. If it’s clogged or damaged, it may cause drainage problems. Check for any debris or foreign objects in the pump and remove them if necessary. If the pump is not working correctly, it may need to be replaced.
  7. Call a professional: If you’ve exhausted all troubleshooting options and your dishwasher still doesn’t drain, it may be time to call a professional technician. They will have the necessary tools and expertise to diagnose and fix the problem.

Remember to always consult your dishwasher’s user manual for specific instructions and safety guidelines. Additionally, if you’re unsure or uncomfortable performing any of the troubleshooting steps, it’s best to seek professional help.

Check the Drain Hose

One of the common reasons why a dishwasher doesn’t drain is a clogged or improperly installed drain hose. The drain hose is responsible for carrying the water out of the dishwasher, so if it’s blocked or kinked, it can prevent the proper drainage.

Start by inspecting the drain hose for any visible clogs or obstructions. Look for food particles, debris, or any solid objects that might be blocking the flow of water. Use a flashlight to get a better view if necessary.

If you find any clogs, remove them using a long, flexible brush or a plumber’s snake. Be gentle to avoid damaging the hose. Once the clog is cleared, check if the dishwasher drains properly by running a short cycle.

In addition to clogs, check if the drain hose is installed correctly. Make sure it is not twisted or kinked, as this can restrict the water flow. Straighten out any bends or twists in the hose to ensure a smooth pathway for draining.

If the drain hose appears to be damaged or worn out, it may need to be replaced. Consult the dishwasher’s manual or contact a professional for assistance with replacing the drain hose.

By checking and clearing any clogs in the drain hose, as well as ensuring it is properly installed, you can resolve many drainage issues in your dishwasher.

Inspect the Drain Pump

If your dishwasher is not draining properly, one possible cause could be a clogged or malfunctioning drain pump. The drain pump is responsible for pumping out the water from the dishwasher once the wash cycle is complete. If it is not working correctly, water will not be able to drain out, leading to standing water in the dishwasher.

To inspect the drain pump, first, locate it on your dishwasher. The drain pump is usually located at the bottom of the dishwasher near the back. It is a small motor that is connected to the drain hose.

Once you have located the drain pump, visually inspect it for any signs of damage or clogs. Look for debris or foreign objects that may be obstructing the pump. Use a flashlight if needed to get a better view.

If you see any debris or objects that are blocking the drain pump, carefully remove them using a pair of tweezers or needle-nose pliers. Be gentle to avoid damaging the pump.

If the drain pump appears to be in good condition and there are no visible clogs, you can perform a quick test to determine if it is functioning correctly. Disconnect the dishwasher from the power source and remove the drain pump from the dishwasher. Then, plug it back in and turn on the dishwasher. If the drain pump starts running and water is being pumped out, then the pump itself is likely not the issue.

If you find that the drain pump is damaged, malfunctioning, or not running at all, it may need to be replaced. Contact a professional dishwasher repair service or the manufacturer of your dishwasher for further assistance.

Inspecting the drain pump is an essential step in troubleshooting a dishwasher that doesn’t drain. By checking for clogs, damage, and proper functionality, you can identify whether the drain pump is the cause of the drainage problem and take appropriate action to fix it.

Remember: Always exercise caution when working with electrical components and consult the dishwasher’s manual or a professional if you are unsure.

Clean the Filter

One common reason why a dishwasher may not be draining properly is a dirty or clogged filter. The filter in your dishwasher is responsible for trapping food particles and debris and preventing them from clogging the drain hose or pump. Over time, the filter can become clogged with food particles and debris, which can impede the flow of water and prevent the dishwasher from draining.

To clean the filter, start by locating it. The filter is typically located at the bottom of the dishwasher, either underneath the bottom spray arm or near the back. Consult your dishwasher’s manual for specific instructions on how to access the filter.

Once you have located the filter, remove it from the dishwasher. Rinse the filter under running water to remove any loose debris. You can also use a soft brush or toothbrush to gently scrub away any stubborn dirt or debris. Be sure to clean both the filter and the filter housing thoroughly.

After cleaning the filter, inspect it for any signs of damage. If the filter is cracked or broken, it may need to be replaced. Contact the dishwasher manufacturer or consult the manual for information on obtaining a replacement filter.

Once the filter is clean and in good condition, reinsert it back into the dishwasher. Make sure it is properly seated and secured in place. Close the filter cover or door, if applicable.

Running a dishwasher cycle with a clean filter should help resolve any drainage issues caused by a dirty or clogged filter. However, if the dishwasher still doesn’t drain after cleaning the filter, it may be necessary to troubleshoot further or contact a professional for assistance.

Examine the Air Gap

One possible cause of a dishwasher not draining properly is a clogged air gap. The air gap is a small device that prevents dirty water from flowing back into the dishwasher. Over time, food particles and debris can accumulate in the air gap and obstruct the flow of water.

To examine the air gap, start by locating it. It is usually located on the countertop and has a small cap on top. Remove the cap and visually inspect the air gap for any signs of clogging. If there is debris or food particles blocking the opening, use a small brush or toothpick to clean it out.

Once the air gap is clean, replace the cap and run the dishwasher again to see if it drains properly. If the problem persists, further troubleshooting may be needed.

ProsCons
Easy to access and cleanMay not solve the drainage issue
No special tools requiredMay require further professional help
Can prevent future clogs

Clear the Garbage Disposal

Another common reason for a dishwasher not draining is a clogged garbage disposal. When the garbage disposal is clogged, water from the dishwasher can accumulate and cause drainage issues.

To clear the garbage disposal, follow these steps:

  1. Turn off the power to the garbage disposal.
  2. Insert an Allen wrench into the hole at the bottom of the disposal and turn it back and forth to dislodge any debris.
  3. If there is no Allen wrench hole, use long-handled pliers or tongs to try to remove the clog manually.
  4. Once the clog is removed, turn the power back on and run hot water down the disposal to check if the clog has been cleared.

If the garbage disposal is still clogged, it may be necessary to call a professional plumber to fix the issue. In the meantime, avoid using the dishwasher to prevent further water accumulation.

Note:If you are unsure about how to safely clear the garbage disposal, it is recommended to seek professional help to avoid potential injuries.

Call a Professional

If none of the above troubleshooting steps were successful in fixing the issue and your dishwasher still doesn’t drain, it may be time to call a professional. A professional dishwasher repair technician will have the knowledge and tools necessary to diagnose and fix the problem correctly.

Hiring a professional is especially recommended if you are not confident in your own ability to safely and effectively resolve the problem. Attempting to fix a complex issue without the proper expertise can potentially lead to further damage or injury.

When calling a professional, be prepared to provide them with as much information as possible about the issue and any steps you have already taken to try to resolve it. This will help them to diagnose the problem more accurately and efficiently.

While it may be tempting to try to save money by attempting to fix a dishwasher drainage issue yourself, calling a professional can actually save you time, money, and frustration in the long run. They will be able to quickly identify and resolve the problem, ensuring that your dishwasher is running smoothly again in no time.

Remember, attempting to fix a dishwasher drainage problem yourself can be risky. If you are unsure or uncomfortable with any step in the troubleshooting process, it is best to leave it to the professionals.

Video:,

Dishwasher Not Draining | How to Fix a Dishwasher That Won’t Drain in 4 Steps

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Ryan Pietrzak

Ryan Pietrzak, a licensed plumber with 12+ years of experience, is the trusted expert behind Plumbing.Academy. With a wealth of practical knowledge, Ryan guides you through plumbing challenges, making informed decisions easier. His reputable advice, rooted in real-world expertise, empowers both DIY enthusiasts and seasoned plumbers.