12 Reasons Why Bosch Dishwasher Not Draining: How To Fix

By
Kimberly Crawford
-

Last Updated on September 21, 2022 by Jason Nguyen

If your Bosch dishwasher is not draining, there are a few things you can do to try and fix the problem. In this blog post, we will walk you through some of the most common causes of this issue and how to troubleshoot them. We will also provide some tips on how to prevent your dishwasher from not draining in the future.

Related: 9 Dishwasher Brands To Avoid and 3 Most Reliable Brands

How to Fix a Bosch Dishwasher Not Draining

1. Drain Hose

The dishwasher drain hose is responsible for carrying water from the dishwasher to the drain. If your dishwasher is not draining, it is likely that there is a problem with the drain hose.

There are a few things that you can do to troubleshoot this problem. First, check to see if the hose is kinked or blocked. If it is, you will need to straighten it out or clear the blockage.

Another thing to check is the connection between the hose and the dishwasher. Make sure that it is snug and not loose.

If you have checked these things and your dishwasher still will not drain, you may need to replace the drain hose. Luckily, this is a relatively easy repair that you can do yourself.

You will need to:

-Shut off the power to the dishwasher

-Disconnect the dishwasher from the water supply

-Remove the old drain hose

-Attach the new drain hose

-Reconnect the dishwasher to the water supply

-Turn on the power to the dishwasher

2. Drain Valves

If your dishwasher isn’t draining properly, the first thing to check is the drain valve. The drain valve is located under the sink, where the dishwasher drains into the garbage disposal or house plumbing.

Why does it fail?

Drain valves can fail for a few reasons. The most common is that something is blocking the valve from opening, preventing water from draining out of the dishwasher. This can be anything from food debris to a foreign object like a toy or piece of jewelry.

Another possibility is that the drain valve itself is faulty and needs to be replaced. If the valve is old or damaged, it may not be opening and closing properly, causing water to back up in the dishwasher.

How do I fix it?

If your dishwasher isn’t draining properly, the first thing you should do is check the drain valve for any blockages. If you find anything blocking the valve, remove it and see if that fixes the problem.

If the drain valve is old or damaged, you may need to replace it. This is a relatively easy repair that you can do yourself, but you may need to call a plumber if you’re not comfortable working with plumbing.

If you have a garbage disposal, there will be a plug in the dishwasher drain hose that fits into the top of the disposal. Be sure that this plug is pushed all the way in. If it’s not, water will drain out of the dishwasher and into the disposal, and won’t go down the drain.

If you don’t have a garbage disposal, there will be a T-fitting at the end of the dishwasher drain hose. The other side of the T-fitting is connected to the house plumbing.

Be sure that the dishwasher drain hose is pushed all the way onto the T-fitting. If it’s not, water will drain out of the dishwasher and into the sink, and won’t go down the drain.

2. Garbage Disposal

If your dishwasher isn’t draining, it’s probably because there’s something blocking the drain. One of the most common culprits is a garbage disposal.

If you have a garbage disposal, make sure that it isn’t jammed or clogged. You can do this by turning on the power and running water through the disposal.

Why does it fail?

If your garbage disposal is jammed or clogged, it can cause your dishwasher to fail to drain. When this happens, water can back up into the dishwasher and cause flooding.

To avoid this, make sure that you keep your garbage disposal clean and clear. You can do this by running water through it regularly and using a plunger to clear any clogs.

3. Drain Pump

If your Bosch dishwasher is not draining properly, one possible cause is the drain pump. The drain pump helps to remove water from the dishwasher during the drainage cycle.

If the pump is defective, it may not be able to properly remove water from the dishwasher, causing it to not drain properly.

Why does it fail?

There are a few reasons why the drain pump may fail. One possible reason is that the pump itself is defective.

Another possible reason is that there is something blocking the pump, such as a piece of food or debris.

If there is something blocking the pump, it will not be able to properly remove water from the dishwasher, causing it to not drain properly.

How to fix it:

If the drain pump is defective, it will need to be replaced. If there is something blocking the pump, you will need to remove the obstruction and then clean the pump.

You can clean the pump by removing it from the dishwasher and then cleaning it with a brush or other tool. Once the pump is clean, you can reinstall it and then test the dishwasher to see if it is draining properly.

4. Air Gap

The air gap is a small, plastic fitting that’s mounted on the back of your kitchen sink. It has a hose leading from it to your dishwasher.

The purpose of the air gap is to keep sewage and dirty water from flowing back into your dishwasher. If your dishwasher isn’t draining properly, one possible reason is that the air gap is blocked.

Why does it fail?

The air gap can become blocked in a number of ways. Food debris, grease, and other kitchen waste can build up in the air gap and cause it to become clogged.

Additionally, the hose leading from the air gap to the dishwasher can become kinked or otherwise obstructed, preventing water from flowing through it properly.

How to fix it?

To clean the air gap:

  • Unscrew the cap from the air gap and remove any debris that’s inside.
  • Flush out the air gap with a stream of water from your kitchen faucet.
  • Replace the cap on the air gap and screw it back into place.

How to prevent it?

To prevent the air gap from becoming blocked, make sure that you regularly clean it. You can also pour a cup of vinegar into the dishwasher’s drain to help keep it clear.

5. Wrong Detergent

The Bosch Dishwasher Not Draining issue can be caused by using the wrong type of detergent. If you have hard water, use a dishwasher detergent that is designed for hard water. If you have soft water, use a dishwasher detergent that is designed for soft water.

How to fix it:

If you are using the wrong type of detergent, switch to the correct type of detergent.

6. Timer

The timer is one of the most important parts of the dishwasher. It controls how long the dishwasher runs and when it starts. If your dishwasher is not draining, it could be because the timer is not working properly.

To test this, start the dishwasher and let it run for a few minutes. Then, open the door and see if the water is still in the dishwasher. If it is, then the timer is not working properly and needs to be replaced.

7. Drain Impeller

The drain impeller is a small, plastic piece with curved blades that helps push water through the dishwasher’s drain hose. If the impeller is damaged or clogged, it can prevent the dishwasher from draining properly.

Why does it fail?

The most common reason for the drain impeller to fail is because it becomes clogged with food debris. Over time, this debris can build up and cause the impeller to become damaged or stuck.

How to fix it:

If the dishwasher is not draining properly, the first thing you should check is the drain impeller.

To check if the impeller is the problem:

-Remove the dishwasher’s lower access panel.

-Locate the drain impeller. It is usually near the dishwasher’s motor.

-Inspect the impeller for damage or debris. If the blades are damaged, replace the impeller. If there is debris clogging the impeller, clean it out with a toothpick or other sharp object.

8. Drain Solenoid Kit

The drain solenoid kit is a part that helps to ensure your Bosch dishwasher drains properly. It is located under the sink and consists of two parts: a rubber gasket and a metal bracket.

The kit also includes a spring which helps to keep the solenoid in place. If your dishwasher is not draining properly, it is likely that the drain solenoid kit is the culprit.

Replacing the drain solenoid kit is a relatively easy task that can be completed in about 30 minutes. First, you will need to disconnect the power to your dishwasher. Next, remove the screws that hold the brackets in place.

Once the brackets are removed, you can then pull the solenoid out. To install the new solenoid, simply reverse the process. Be sure to test your dishwasher before you put it back in use to ensure that it is draining properly.

9. Pump and Motor Assembly

The Bosch Dishwasher Pump and Motor Assembly is responsible for drawing water from the dishwasher and pumping it through the system. If your dishwasher is not draining, then this assembly may be to blame.

Why does it fail?

The Bosch Dishwasher Pump and Motor Assembly can fail for a number of reasons. The most common reason is a build-up of food or grease in the pump, which can cause it to seize up.

Other potential causes include a failed motor, a clogged drain hose, or a problem with the electrical connection.

How do you fix it?

If your Bosch Dishwasher Pump and Motor Assembly has failed, you will need to replace it. You can do this yourself by following the instructions in your owner’s manual, or you can hire a professional appliance repair technician to do it for you.

10. Check Ball

The check ball is located under the float assembly in the dishwasher. The check ball floats on top of the water and prevents water from entering the dishwasher pump.

If the check ball is dirty or damaged, it will prevent the dishwasher from draining properly.

To clean or replace the check ball:

-Remove the float assembly from the dishwasher.

-Remove the check ball from the float assembly.

-Clean the check ball with a soft cloth.

-If the check ball is damaged, replace it with a new one.

-Replace the float assembly in the dishwasher.

11. Check Valve

If your dishwasher is not draining, there’s a good chance that the check valve is to blame. The check valve is a one-way valve that allows water to flow in only one direction.

Over time, it can become clogged with dirt and debris, preventing water from flowing through it properly.

To clean the check valve:

  • Unscrew the valve from the dishwasher.
  • Clean out any debris that’s inside the valve with a toothbrush or other small brush.
  • Rinse the valve thoroughly with water.
  • Screw the valve back into place.

Once you’ve cleaned the check valve, run a test cycle to see if your dishwasher is draining properly. If it’s still not draining, there may be another issue at play. But if the check valve was the problem, you should now be good to go!

12. Water Pump Belt

The water pump belt is located under the dishwasher. It is used to pump water out of the dishwasher.

If your dishwasher is not draining, it could be because the water pump belt has broken. To replace the water pump belt, you will need to remove the dishwasher from its location and then access the water pump.

Once you have accessed the water pump, you will need to remove the old water pump belt and then install the new one. Be sure to follow the manufacturer’s instructions when replacing the water pump belt.

If you are having difficulty removing the old water pump belt, you may need to use a pair of pliers. Once you have removed the old water pump belt, you can then install the new one by following the manufacturer’s instructions. Be sure to tighten the new water pump belt so that it is snug.

Related:

Bosch dishwasher not draining at end of cycle?

Water remaining at the end of a cycle can be caused by a few different things. Fortunately, most of these causes are easy to fix yourself.

One possible reason for water remaining in your Bosch dishwasher is that the drain hose is clogged. The drain hose is the flexible pipe that runs from the dishwasher to the drain under your sink.

To check if the drain hose is clogged, first disconnect it from the dishwasher. Then, put a bowl under the end of the hose and see if water drains out. If it doesn’t, then you probably have a clog in your drain hose.

To fix a clogged drain hose, start by disconnecting the hose from the dishwasher. Then, use a plunger to try and dislodge the clog. If that doesn’t work, you can try using a wire hanger to fish the clog out. If neither of these methods work, you may need to replace the drain hose.

Another possible reason for water remaining in your Bosch dishwasher is that the dishwasher isn’t level. If the dishwasher isn’t level, then water can pool in the tub at the end of a cycle.

To check if your dishwasher is level, open the door and look at the tub. The tub should be level with the door opening. If it’s not, then you’ll need to adjust the leveling legs.

Bosch dishwasher not draining fully?

Here are some possible causes and how to fix them.

If your Bosch dishwasher isn’t draining properly, there could be a few different reasons why. Perhaps the most common reason is that something is blocking the drain hose or pump. If this is the case, you’ll need to remove the obstruction and clean out the hose or pump.

Another possible reason for a Bosch dishwasher not draining properly is that the drain valve is faulty or dirty. If this is the case, you’ll need to clean or replace the drain valve.

If your dishwasher still isn’t draining properly after trying these solutions, then you may have a more serious problem such as a clogged drain line or a faulty pump. In this case, you’ll need to call a professional for help.

Bosch dishwasher not draining but no blockage?

Check the drain hose and air gap for blockages. If there are no blockages, the problem may be with the dishwasher itself. Check the float switch, inlet valve, or pump for problems.

If your Bosch dishwasher is not draining but there are no blockages, the problem may be with the dishwasher itself. Check the float switch, inlet valve, or pump for problems.

The float switch is a safety device that prevents the dishwasher from overfilling. If the float switch is stuck, it may prevent the dishwasher from draining properly.

The inlet valve controls the water flow into the dishwasher. If the inlet valve is defective, it may not allow enough water into the dishwasher to fill the tub.

The pump circulates water through the dishwasher. If the pump is defective, it may not be able to circulate enough water to properly clean the dishes.

Bosch Dishwasher Drain Pump Keeps Running?

Here are some possible causes and how to fix them.

One possible cause of your Bosch dishwasher drain pump keeping running is that the drain hose is clogged. Check the drain hose for any blockages or kinks. If you find any, clear them out and see if that fixes the problem.

Another possible cause could be that the drain pump itself is clogged. You can try cleaning it out with a toothbrush or other small brush. If that doesn’t work, you may need to replace the drain pump.

If neither of those solutions fix the problem, then it could be an issue with the control board or another electrical component. In that case, you’ll need to call a repairman to take a look.

New Bosch dishwasher not draining?

There are a few possible causes and ways to fix it.

One possibility is that there is something blocking the dishwasher’s drain hose. This could be caused by food particles or grease buildup. To clean the drain hose, detach it from the dishwasher and flush it out with hot water. You may also need to use a plunger to clear any blockages.

Another possibility is that the dishwasher’s pump is broken. This can be verified by checking for water leaks around the dishwasher. If the pump is leaking, it will need to be replaced.

Old Bosch dishwasher not draining?

There are a few possible causes, and thankfully, a few possible solutions as well. Check the following before calling for service:

-First, make sure the dishwasher is turned on all the way. The knob should be turned to the right, to the “on” position. If it’s not, turn it and see if that solves the problem.

-If the dishwasher is on and there’s still water in the bottom, it could be that the garbage disposal is plugged and needs to be cleared. Check to see if water is draining from the disposal; if it isn’t, clear the obstruction and try running the dishwasher again.

-It’s also possible that food or other debris is clogging the dishwasher’s drain. Check the drain for any blockages and remove them if necessary.

-If none of these solutions work, there may be a problem with the dishwasher itself. Check to see if there are any leaks in the hose or connections. If everything looks tight and dry, then it’s time to call a professional.

Bosch dishwasher not draining E-24?

Bosch error code E-24 indicates a drain error. The Bosch dishwasher may not be draining because the drain hose is clogged, the garbage disposal is clogged, or there is something blocking the dishwasher’s pump.

To fix a Bosch dishwasher with E-24 error code, start by checking the drain hose for clogs. If the drain hose is clear, then check the garbage disposal for clogs.

If the garbage disposal is clear, then there may be something blocking the dishwasher’s pump. To fix this, disconnect the dishwasher from power and remove the dishwasher’s lower access panel.

Then, use a flashlight to look for any foreign objects in the dishwasher’s pump. If you find an object, remove it and then reassemble the dishwasher.

If the dishwasher’s pump is clear, then reconnect the dishwasher to power and run a test cycle. The Bosch dishwasher should now be draining properly.

Bosch dishwasher not draining E25

My Bosch Dishwasher is displaying an error code E25, what does it mean?

The E25 error code on a Bosch dishwasher indicates a problem with the water draining from the dishwasher. There are several potential causes for this error code, which include:

-A blockage in the drain hose or pump

-The drain filter is dirty or blocked

-The waste water tank is full

-The water inlet valve is defective

If your Bosch dishwasher is displaying the E25 error code, there are a few things you can do to try and fix the problem.

-First, check the drain hose for any blockages. If there is a blockage, clear it and see if that fixes the problem.

-If the drain hose is clear, then check the drain filter. If it is dirty or blocked, clean it and see if that fixes the problem.

-If the drain filter is clean, then check the waste water tank. If it is full, empty it and see if that fixes the problem.

-If none of these things fix the problem, then the water inlet valve may be defective and will need to be replaced.

Bosch dishwasher not draining E23

My Bosch Dishwasher is displaying an error code E23, what does it mean?

The E23 error code on a Bosch dishwasher indicates a drainage issue. There are a few things that could be causing this problem, so it’s best to troubleshoot and narrow down the possibilities.

One potential cause of an E23 error is that the drain hose is kinked or clogged. This could be preventing water from draining properly, causing the dishwasher to display the error code.

Another potential cause is that the drain pump itself is faulty and needs to be replaced. This is a more serious issue that will require a qualified technician to fix.

Bosch dishwasher not draining E15

My Bosch Dishwasher is displaying an error code E15, what does it mean?

The E15 error code on a Bosch dishwasher indicates a water drainage issue. The most common cause of this error is a blockage in the drain pump or hose. Other possible causes include the drain float switch, door seal, or control board.

How can I fix an E15 error on my Bosch dishwasher?

If your Bosch dishwasher is displaying an E15 error, there are a few things you can try to fix it. First, check the drain pump and hose for any blockages. If there are none, then try resetting the dishwasher by turning it off and then on again. If that doesn’t work, then you may need to replace the door seal or control board.

How To Reset The Drain On A Bosch Dishwasher using the control panel

If your Bosch dishwasher is not draining properly, you may need to reset the drain. To do this, follow these steps:

First, locate the control panel on your dishwasher. Second, find the “Drain” button and press it for three seconds. Finally, wait for the dishwasher to complete the cycle.

How to manually reset the drain on a Bosch dishwasher

If your Bosch dishwasher is not draining properly, you may need to manually reset the drain. To do this, first unplug the dishwasher from the power outlet. Next, locate the drain hose on the back of the dishwasher.

The drain hose will be connected to a white plastic tube. Disconnect the white plastic tube from the drain hose.

Finally, use a paperclip or other small object to push the reset button on the dishwasher. Once the button has been pushed, replug the dishwasher into the power outlet and turn it on.

Conclusion

If your dishwasher isn’t draining properly, there are a few things you can check to try and fix the issue. First, make sure that the drain hose is not kinked or blocked. Next, check the garbage disposal for any blockages. Finally, if neither of these solutions work, you may need to call a professional to take a look at your dishwasher. Thanks for reading! We hope this article was helpful.