Bosch Dishwasher Not Draining? – Here Are Simple Fixes

Greetings to all the owners of Bosch Dishwashers! If you are having a problem with your Bosch dishwasher not draining, don’t worry about it. It is the purpose of this post to break down the different things that you can do in order to be able to fix Bosch dishwasher won’t drain issue and to get it working again as soon as possible. For many people, Bosch dishwashers are one of the best brands because they are durable, long-lasting, and easy to maintain.

When Bosch dishwashers malfunction and there is no draining of water, they are also notoriously difficult to repair. The good news is that you can take several steps before contacting a professional or buying a new dishwasher!


Is there a reason why the Bosch Dishwasher Not Draining? Diagnosis and troubleshooting of the problem.

The following tips will give you an idea of how you can fix a Bosch dishwasher that won’t drain properly.


Bosch dishwasher drain hoses should be checked.

Bosch dishwasher is notorious for not draining properly when it is turned on. If the hose is blocked or kinked, your Bosch dishwasher might not get enough water to clean all the dishes. Take a look at the drain hose to see if it is clogged if the Bosch dishwasher is not draining. This is one of the most common causes of a Bosch dishwasher not draining water efficiently.

It is possible for the water flow to be obstructed if the hose is kinked. This problem can be fixed by manually straightening the hose to allow normal water flow.

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It is very important that you make sure that the drain hose does not have any clogs or blockages in it. Check for debris with a long wire coat hanger after disconnecting it from your dishwasher. Make sure there are no kinks in the line because these could prevent water from flowing. When you reattach it, make sure the seal valve is securely fastened on again – this will ensure that everything flows smoothly next time.


Faulty Drain Valves can cause Bosch Dishwasher not draining water.

It is common for dishwashers to have a drain valve, but not all of them do. As a result, water is prevented from draining back into the dishwasher as a result of this. There is a possibility that your dishwasher has this type of valve if it has a bracket.

The drain valves in your home are not like most of the other parts in your home. As a one-way valve, they ensure that water can flow out of the plumbing system when it needs to when it needs to. They actuate only when there is sufficient pressure behind them and if debris hasn’t clogged their path.

Remove the drain valve’s cover to remove any residue or gunk that may have built up over time on the valve. As long as you have an Allen wrench handy for assistance, it should be pretty easy to do! Do not hesitate to replace whatever is preventing drainage if you are still unable to activate it after cleaning it thoroughly without success.


The garbage disposal can become clogged, resulting in the Bosch dishwasher not draining water.

Something may have clogged up your garbage disposal from behind if it’s not working at all. If food waste is left in an unrinsed container (or any other liquid for that matter), this can happen. Putting too much grease down the drain can also cause problems.

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Drain hoses from dishwashers run into garbage disposals to empty them. If your Bosch dishwasher is not draining, it may be due to food that has remained in the sink that needs to be ground up, or grease that has built up in the pipe below. In some Bosch dishwashers, there is a problem with the draining system not working properly. In order to find out if the problem has been resolved, you can try running your disposal for a while.

Keep your faucet running and let your garbage disposal run for 15 seconds after you’re done with food to avoid clogs. By doing this, you will be able to remove all the leftover food from underneath the disposal.


You can check the drain pump if your Bosch dishwasher is not draining water.

The completion of a dishwasher cycle requires drainage, which is a requirement for all dishwashers. Typically, two pumps are actuated by a single motor, one to circulate water and one to drain it. While some dishwashers have an independent drain pump, others use a solenoid or flapper valve to assist the main circulating pump. If your model uses a separate drain pump, make sure the pump receives power during draining. In addition, ensure that nothing has been jammed in the pump’s input or output inadvertently.

Replace the drain impeller if necessary if it has been damaged. The impeller should be able to spin freely without binding at all times.

It is important to make sure that the dishwasher’s motor is running in the correct direction before using it. Use a multi-meter to determine if electrical power is being sent out on that circuit if the motor isn’t running. Check for malfunctioning door switches and/or an electronic control board that may not be able to send electricity through those respective wires if there’s no power going to that wire. However, you need to correct it, and this will help you to resolve the problem of your Bosch dishwasher not draining.

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If the dishwasher is making a loud humming noise, the motor may have seized, or the drain impeller may be jammed. It’s either time for a new motor or for a new pump assembly if that’s happened.


The air gap in the Bosch dishwasher needs to be cleaned.

In order to prevent water from backing up into your Bosch dishwasher when it is not draining, the air gap at the top of the sink should be clear. A stainless steel slotted cylinder connects the air gap to the drain hose. In order for this cylinder to function properly, it must remain free of obstructions.

You can easily clean the air gap by removing the cap counterclockwise first. You can clean it out with a brush and water before running the dishwasher cycle. Moreover, this should solve the problem of your dishwasher filling up with water and not draining.


Using the Wrong Detergent in Bosch dishwasher.

In order to use dishwashers properly, you should use dishwashing detergents that do not leave suds behind. It’s easy to accidentally pour regular dishwashing soap into a dishwasher, where it can cause suds that prevent water from draining. However, substituting laundry detergent for automatic dishwasher detergent can result in the same problem.

Additionally, run the dishwasher cycle again with the appropriate type of detergent after cleaning the dishwasher tub until there is no more water left in it.


Timer on Bosch dishwasher.

There are some dishwashers that use a mechanical timer to control the cycle of the dishwasher. Depending on the dishwasher style, the timing also controls the drain solenoid or separate drain pump (if needed). 

The timer is usually found on the control panel at the top of most dishwashers. Moreover, it is possible to find out which contacts control the drain cycle by using a wiring diagram and schematic. In the event that the timer is defective, you will have Bosch Dishwasher Not Draining problems. Use a multimeter to test the timer’s continuity, and replace it if it fails.

You can count on me to assist you with your Bosch dishwasher, please let me know. Leave a comment below if you have any questions or need assistance with troubleshooting the problem of Bosch dishwasher not draining!


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