The most common reason for why your Bosch Dishwasher Not Draining is due to clogging or blockage on drain hose or valve. The solution for this is easy, and you can do it yourself in the comfort of your home. Sometimes the problem can occur with the pump as well. In these scenarios, the problem can be complicated, and hence we suggest you take the help of a professional expert to solve the issue. But, before taking any external help, start with the basic troubleshooting and diagnosis. We have given all the advanced and straightforward troubleshooting in this article.
How To Fix Bosch Dishwasher Not Draining
There are mainly two reasons because of which your dishwasher is not draining water. The first one is that the drainage system is clogged or defective, and the second one is that the control panel is not working correctly.
As you know, the drainage system includes drain hose, pump, drain filter, impeller, etc. You need to inspect these parts and see If there is any clogging or not, and there is no malfunction. Sometimes you will see the E19 and E24 error on the display panel. You need to clean and remove stuck food, hair, and debris particles. If you find any faulty, then it is better to replace it with a new one.
The control panel is the central brain of the dishwasher, and it displays errors, wash programs, etc. You can control how dishwasher works using the control board by setting the wash cycle. If there is some loose connection or the control module is faulty, then it will get a wrong signal and hence will not be able to drain the water from the dishwasher. So you need to check this part as well.
Check Drain Hose
The problem may be related to a clogged drain hose. It can be due to the hard water, unclean pipes, or blockages. It can be hard to see if the clog is in your water supply line, so you may need to have it checked by a plumber. But you can do it yourself too. Drain hose is mostly clogged near the garbage disposer near the drain branch tail pice. Please follow the below instructions.
Things You will need.
- A Screwdriver.
- Bucket to collect water.
So for inspecting the drain hose for any blockage, please do these steps.
- Take the screwdriver and plier and use it to remove the drain hose from the garbage disposer. Now drain all the water from it.
- Check if the drain hose is clogged or not, You need to run the rinse cycle.
- Please hold the drain hose over the water bucket.
- If you see no water coming from the drain hose, then it is blocked, and you need to remove the stuck particles from it.
- You can use a change or any plumbing device to remove stuck particles to clear the clogging.
- If you are unable to see any sign of clogging in the drainpipe under the sink, then you have to check the clogging behind the dishwasher.
- This will need a little bit of advanced troubleshooting.
- Remove the screws from the cabinet and pull out the dishwasher.
- Check the drain hose for any bent or kinked. Also, remove any clogged particles from it.
If you are still getting the Bosch Dishwasher not draining water issue, then you need to check other parts.
Check the Air Gap for Clogs
It is one of the most common reasons that stop the draining of the water. The air gap will catch the food particles and hence thereby forming the clogging. Thankfully, the solution for this is quick and easy. Here is what you need to do.
- First, You need to locate the air gap. You can find it generally at the back of the sink.
- Remove the dishwasher cover. You need to take a screwdriver to remove the stews and then pull out the cover.
- You need to remove the small material that is stuck by depressing the small hooks.
- After removing the particle, clean the inside completely and remove any clogging that you find.
So why air gap can be the issue? Well, when you start the dishwasher program, the water is supply through the dishwasher’s air gap and then goes to the large hose and finally to the garbage disposal. But many times, when at full speed, the tiny food particles may get stuck in the air gap, and over time it can build up in serious clogging issues. When this happens, there will be disruption in water supply, and hence dishwasher will not drain.
We suggest you clean the airgap once a month to avoid any future issues. Once done, run the rinse water, and hopefully, the problem will not happen again. If you are still getting the issue, then check the next step.
Check the Valve
The main function of the check valve is to stop the water from returning to the bosch dishwasher after all the water has been drained. Sometimes, due to malfunction, the water valve will become closed, and hence the water will not be able to drain. Check the water valve if it’s closed or not. Clean it also and replace the faulty valve if it is required.
Check the Mesh Filter
You also need to check the mesh filter of the bosch dishwasher. First, check whether any food particles are stuck in the filter. If it is there, remove it. You should switch off the dishwasher before doing this step. Now do the following steps.
- Power Off the dishwasher.
- Remove the bottom rack to get access to the lower basin.
- Please take all precautions and be aware that there can be a lot of dirty particles inside.
- You can now see the filter.
- Remove the filter by twisting it anticlockwise.
- You can see many food particles and debris stuck inside the filter.
- Take the filter near the tap and rinse it under running water.
- Place the filter back and start the dishwasher.
We hope that after cleaning the mesh filter, you should not get the Bosch dishwasher not draining issue. If it persists, then you may have to check the drain pump and impeller.
Check the Drain Pump
Please take a wet and dry vacuum and remove as much fit water as you can, so that you can access the pump. If you don’t have a wet and dry vacuum, then please use the traditional method to remove the dirty water. When there is less water, use a wet towel to soak up excess water sitting in the bottom sump.
Please ensure that the dishwasher is disconnected from the power supply. Also, the water supply should be OFF. Once there is no water in the sump area, Use a screwdriver to remove the pump cover. You need to pull out the cover by lifting it up towards you towards the left. Now, you can see the drain pump. You need to scrutinize the pump for any stuck food particles and debris.
Make sure to remove all the debris from the pump. Once you ensure that there are no food particles left inside the pump area and the pump is very neat clean, put the cover back again. If you find any fault, then that part should be replaced.
Check the Impeller
As we know, the impeller is also an essential part of the dishwasher. Many impellers have four blades, and some of the modern dishwashers have up to 9 blades as well. The main function of the drain impeller is to push water through the drain and into the drain line or the garbage disposer.
Many times large food particles or hair can get stuck in the impeller rotor, which can make it difficult to the rotor. You need to remove all the debris and clean it properly. If the impeller is faulty, then we suggest you replace it.
Please do check our website for more dishwasher troubleshooting articles.