If your dishwasher not draining properly, it can be a real headache. Instead of seeing sparkling clean dishes, you might find a puddle of standing water, which differs from what you want. The good news is that there are some steps you can take to unclog a dishwasher without needing to call for service.

This guide explores why a dishwasher won’t drain and provides simple troubleshooting tips to get your appliance back in working order. From checking the filter to examining the drain pump, we’ve got you covered. With some DIY know-how, you can have your dishwasher draining like new in no time.

Reasons Why Your Dishwasher Won’t Drain

There are several potential culprits for a dishwasher that won’t drain properly. Let’s take a closer look at the most common causes:

1. Clogged Filter: The filter is an integral part of your dishwasher, trapping food particles and preventing them from being redeposited on your dishes. If the filter becomes blocked, it can inhibit proper drainage.
2. Blocked Drain Hose: The drain hose connects the dishwasher to the home’s plumbing system. If this hose becomes kinked or clogged with debris, it can prevent water from draining out.
3. Garbage Disposal Issues: If your dishwasher drains into a garbage disposal, any blockages or leftover food in the disposal can obstruct the water flow.
4. Air Gap Blockage: Some dishwashers have an air gap installed, a small cylinder-shaped device that prevents wastewater backflow. A clogged air gap can cause drainage problems.
5. Faulty Drain Pump: The drain pump pushes water out of the dishwasher. If this component fails, the dishwasher can become clogged or non-draining.
6. Improper Installation: Incorrect installation of the dishwasher’s plumbing connections can lead to drainage issues.
7. Stuck Check Valve: A faulty check valve can prevent water from draining out of the dishwasher.
8. Interrupted Cycle: If the dishwasher cycle is interrupted by a power outage, the water may not drain fully.

Now that we’ve identified the potential causes, let’s examine the steps you can take to fix a dishwasher that won’t drain.

How To Fix a Dishwasher That Won’t Drain

Check the Filter

The first thing you should do is inspect the dishwasher’s filter. Filters must be cleaned regularly to prevent clogging with food particles and debris. To clean the filter:

1. Locate the filter, usually in the bottom of the dishwasher tub.
2. Remove the filter and rinse it under running water to remove any trapped gunk.
3. Gently scrub the filter with a soft-bristled brush if necessary.
4. Replace the filter, ensuring it is securely in place.

Inspect the Drain Hose

Next, take a look at the drain hose. If the hose isn’t kinked, it could still be clogged with food sludge or debris. To check for a clog:

1. Remove the lower front panel of the dishwasher to access the drain hose.
2. Locate the spot where the corrugated hose attaches to the dishwasher drain pump.
3. Disconnect the hose and inspect it for any blockages.
4. Use a wire coat hanger or plumber’s snake to remove debris.
5. Reattach the hose and ensure it is properly connected.

Clean the Air Gap

If your dishwasher has an air gap, it’s worth checking to see if it’s clogged. To clean the air gap:

1. Locate the air gap, which is usually a small cylinder-shaped device, on the countertop near the sink.
2. Unscrew the air gap cover and remove any debris or buildup inside.
3. Rinse the air gap thoroughly with water to clear any blockages.
4. Replace the air gap cover and ensure it is securely tightened.

Examine the Garbage Disposal

The disposal unit could be the culprit if your dishwasher drains into a garbage disposal. Unground food or food sludge in the disposal can prevent the dishwasher from draining properly.

1. Run the garbage disposal to see if it clears out any trapped debris.
2. If the disposal is still causing issues, you may need to disassemble and clean it thoroughly.

Check the Drain Pump

The drain pump pushes water out of the dishwasher. If this component fails, the dishwasher can become clogged or non-draining.

1. Locate the drain pump, which is usually accessible by removing the lower front panel.
2. Inspect the pump for any signs of damage or wear and tear.
3. If the pump appears to be faulty, you may need to replace it.

Reset the Dishwasher

Sometimes, a simple reset can get the dishwasher draining again. Depending on your dishwasher model, you can try the following:

1. Hold down the Cancel (or Cancel/Drain) button for 3 seconds.
2. Hold down the Start (or Start/Drain) button for 3 seconds.
3. Press the Reset button (if your dishwasher has one).

Alternatively, you can reset the dishwasher by unplugging it or shutting off power at the breaker, waiting a few minutes, and then restoring power.

Clear the Check Valve

If your dishwasher has a check valve, it could be stuck in the closed position, preventing water from draining. To clear the check valve:

1. Locate the check valve, which is usually near the drain pump.
2. Carefully remove any debris or buildup that may prevent the valve from opening and closing properly.
3. Test the valve to ensure it is functioning correctly.

Run a Cleaning Cycle

If the dishwasher was stopped mid-cycle, the water may not have had a chance to drain fully. Try running a complete wash cycle to see if that resolves the issue.

If the water still isn’t emptying from the dishwasher, it’s time to call in the experts.

Consult with an Expert

If you’ve tried all the troubleshooting steps and your dishwasher still won’t drain, it’s best to call in a professional plumber. TaskPro offers 24/7 plumbing services, as well as handyman and home improvement services, to help you get your dishwasher back in working order.

Our team of experienced technicians can diagnose the issue, provide a solution, and get your dishwasher draining like new in no time. Don’t let a clogged dishwasher disrupt your daily routine – let TaskPro take care of it.

FAQs

How do you force your dishwasher to drain?

Unfortunately, there is no way to force the dishwasher to drain in order to remove the standing water. If you can’t drain the water at the bottom of the dishwasher using the tips mentioned above, you’ll need to manually remove the water by bailing it out.

Is there a drain cleaner for dishwashers?

For tough clogs and stains, we recommend Liquid-Plumr® Clog Destroyer Plus+ Pipeguard™. This powerful drain cleaner is specifically formulated to tackle stubborn dishwasher drains.

Will vinegar and baking soda unclog a dishwasher drain?

If your dishwasher drain is clogged and water is backed up, you can use a homemade solution of vinegar, baking soda, and hot water to break the clog. The fizzing reaction can help dislodge debris and get your dishwasher draining again.