Replace Drain Pump Bosch Dishwasher

If The Dishwasher Isn’t Filling With Water

Standing Water After Wash Program Has Ended

You should find no leftover water inside the dishwasher compartment at the end of your chosen wash program. Thats because the final stage of any wash cycle is to remove all remaining water and push it out through the drain hose.

However, a dishwasher with a problematic drain pump will leave standing water inside the appliance even when it shouldnt. So, if you see that theres a puddle in your dishwasher, you should inspect the drain pump and its electrical connectors.

If there are no clogs and the drain pump is connected as it should be, then youll likely have to replace it with a new one.

How To Replace A Dishwasher Drain Pump

There are a few possible causes for your dishwasher not to be draining water properly, including the filter needing to be unblocked or replaced. However, if youve ruled out all other potential issues, the problem will lie with your dishwasher drain pump. When this part breaks or stops doing its job, youll need to replace it to get your appliance working and draining properly again. Read on to learn how to replace a dishwasher drain pump for yourself.

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Drain Line Is Clogged

Oh, NO! There is still water in my Bosch dishwasher! Unnerving as this is, check the drain line that connects from the dishwasher to the sink or garbage disposal. This is a very common place for clogs to form. Remove the drain hose and clear it out. Clean out the fittings near the garbage disposal while the hose is disconnected to ensure there is no blockage.

My Bosch Dishwasher Isnt Draining

After our built-in Bosch ran a cycle, the bottom of the dishwasher was still full of dirty, free-standing water.

Heres how its supposed to work:

There is a drain pump in the dishwasher that pushes the water out through a hose which typically runs from the dishwasher to either the sinks garbage disposal or the air gap.

If your dishwasher is not draining, something along this pathway is blocked or broken. Here are the troubleshooting steps to take.

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Remove Clogs From The Air Gap

Heres how the air gap in a Bosch dishwasher should work:

The drain pump pushes water from the dishwasher up via the air gap and then send it down to the waste disposal by a bigger hose.

The issue is that when the water reaches the top of the air gap, there is a potential for food particles of varying sizes trapped between the plastic lid and the built-in tube. This inhibits the hose from functioning as efficiently as it should, which results in the dishwasher not being able to drain.

To be clear, the presence of even the tiniest pieces of food in the air gap is by far the most prevalent cause of a Bosch dishwashers inability to drain properly.

• Locate your air gap. Its at the very rear of your sink, in the shape of a hood or a cylinder of some kind.
• Take off the covering by simply unscrewing or popping it off by hand.
• Take off the top, and clear away any debris that has accumulated within.

If you clear away a significant amount of the food particles, the issue should no longer exist, and your Bosch dishwasher should drain properly. Check to ensure that the dishwasher has sucked out all of the water by running it through the rinse cycle.

Takes Too Long To Drain

The whole point of a drain pump is to help drive water out of the dishwasher quickly instead of relying on gravity to do all the work. So, a drain pump thats in good working order should only take a few minutes to remove all water from your appliance.

Of course, the precise timing will be different depending on your dishwasher model, brand, and size. Larger dishwashers have more water for the pump to remove, and some models use stronger pumps than others.

If youve had the appliance for a long time now, youd have a strong sense of how fast the dishwasher should drain. Plus, you can refer to the user manual, which details how long the process should take.

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How To Replace A Bosch Dishwasher Drain Pump

Do you need to replace the drain pump in your Bosch dishwasher? Then youre in the right place. Drain pumps are a common component of dishwashers that need to be replaced, as they can wear out over time. Thankfully, its a pretty easy repair to do. Simply follow our step-by-step instructions below.

This guide covers most Bosch dishwasher models, including:

GM926710

Bosch Dishwasher Makes A Low Humming Sound

Its also a good idea to pay attention any unusual noises that may indicate a problem with the appliances drainage.

For example, if you hear a low, constant buzzing noise from your Bosch dishwasher, then its highly likely that the drain pump has foreign objects lodged in it.

As you may recall, every Bosch dishwasher has an impeller within the drain pump that propels water down the pipe. If foreign objects from the dishwasher reaches the pump, the impeller will be unable to revolve, making it difficult for the machine to drain properly.

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If Your Dishwasher Won’t Start

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Bosch Shu4006uc/10 Sump To Water Inlet Hose Genuine Oem

Sump to Water Inlet Hose carries drain water from the dishwasher to the drain.

Shut off the water supply and unplug the dishwasher before installing this part. Follow the instructions in the installation guide to correctly install the new drain hose. Wear work gloves to protect your hands during this repair.

How To Clear A Bosch Dishwasher Drain Pump

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If your Bosch dishwasher takes a long time to drain or stops draining altogether, its likely that the pump filter and/or impeller is clogged with debris. If this happens, you can save the cost of a service call by cleaning the filter and clearing the drain pump impeller yourself.

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Error Codes For Bosch Sms/sh Series And Exxcel/logixx Dishwashers:

Possible fault codes are E25, E24, these are drain error codesFault Code E20Symptom: Electrical short or break.Cause: Short or break causing incorrect resistance in winding of the circulation pump or the motor.Fault Code E21Cause: A blockage between the motor or the pump resulting in insufficient water flow.Fault Code E23Cause: As error code E20, but this time the electrical problem is with the drain pump.Action: Replace drain pump if necessary.Fault Code E24Symptom: Dishwasher not draining properly.Cause: Drain filters blocked.Go to: Why is My Bosch Dishwasher Not Draining?Fault Code E25Symptom: Dishwasher not draining properly.Cause: Possibly blocked filters, as above. Otherwise this fault code could indicate a blocked drain pump.Fault Code E26Action: Check water switch and replace if required.Fault Code E28Cause: Fault detected with turbidity sensor.Symptom: Dishes not getting clean. Dirty water in the tub.To remove the Dishwasher pump see video and follow these steps

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Remove The Drain Pump

Lay a towel under the drain pump to catch water.

Reach under the dishwasher and squeeze the wire hose clamp that holds the drain hose on the drain pumpuse channel-lock pliers if necessary.

Pull the drain hose off the drain pump.

Remove the wire harness from the drain pump.

Press down on the locking tab and then rotate the pump 1/4 turn counterclockwise to pull it out of the sump.

Remove the towel.

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Check The Filter Inside The Dishwasher

There is a screen in the bottom of the dishwasher that is supposed to block large debris from going into the drain hose, but sometimes pieces of food get through and clog the hose. The video below shows you how to check and clean the filter. If you find a big piece of food or glass, remove it and then run the rinse cycle to see if the dishwasher drains. If it still doesnt, move to the next step.

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Check For Clogs In The Drain Hose

To detach a drain hose from the air gap , youll need:

Instructions

This is an air gap that has been disconnected from the drain hose and the garbage disposal.

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Bosch Dishwasher Drain Pump Test Explained

Theres nothing worse than a Bosch dishwasher that doesnt drain, and sometimes the problem is with the drain pump. As such, its important to conduct a Bosch dishwasher drain pump test and fix the problem if any.

A Bosch drain pump test allows you to know exactly whats wrong, which should be the reason why the dishwasher is unable to drain in the first place. The test can help you to determine whether the motor is dead or if the impeller seal is bad.

There are often two reasons why a Bosch dishwasher may fail to drain properly.

First, the unit may fail to drain properly because of clogging in the drain pump. The pump may also have kinks keeping water moving to the drainage.

And second, the problem might be with the drain motor, which, again, makes it difficult for the drain pump to drain water out of the dishwasher.

In this guide, Ill address both issues, showing you exactly what to do, so you can get your unit draining properly after a wash cycle.

Lets get started.

How Do I Know If Dishwasher Drain Pump Is Bad

Eugene SmithDISCLOSURE: This post may contain affiliate links, meaning when you click the links and make a purchase, we receive a commission at no additional cost to you

Dishwashers rely on a drain pump to remove used water from the appliance. When the pump goes bad, the dishwasher should display an error code to let you know. But is that the only way you can tell if your dishwasher drain pump is bad?

There are several signs to look for that indicate your dishwasher drain pump is bad. For instance, a bad pump causes the appliance to drain too slowly or not drain at all. Besides that, youll find water leaking out onto the floor or left standing inside the compartment, even after a wash program ends. Lastly, low humming or squealing noises also point to a pump problem.

This guide will walk you through the telltale signs that your dishwasher drain pump is bad. When youre able to identify these signs early, you can troubleshoot and repair the pump before it fails entirely, leaving you with dishes you cant wash.

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Remove The Base Plate

To remove the base plate, unscrew the four screws that can be found on each corner of the bottom of the dishwasher. For your particular dishwasher, you may also need to unscrew the legs in order to remove the base plate. If youre unsure, you should refer to your user manual. If you cant find or have misplaced your manual, dont worry. We can help you find it with our online user manual finder.

Once youve removed the screws, and possibly the legs, you should be able to lift the base plate away from the dishwasher. The base plate can have sharp edges, so be careful with your hands whilst you do this.

How To Test Bosch Dishwasher Drain Pump With Multimeter

To test the dishwasher pump with a multimeter:

• Remove the sprayer arms retaining cap.
• Remove other components that cover the drain pump, including the spray arm, food disposer blade, upper impeller, screen, pump housing, bolt, O-ring, spacer plate, impeller hood, flat plate, and bottom impeller.
• Touch the pumps terminals with the probes of the multimeter in Rx1 mode.

Keep in mind that what youre doing here is to conduct a continuity test. The intent is to get a reading of zero or close to zero.

• Test the ground connection by touching one of the probes to the housings bare metal while leaving the other probe on a terminal. Make sure this test doesnt give any results.

If your test results differ from those listed above, you have a faulty drain pump that youll have to replace if your Bosch dishwasher must drain properly.

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How To Replace Dishwasher Pump Bosch Siemens Etc

The drain pump on a dishwasher will always be located at the bottom of the machine, some can be accessed from the front as in this video, others you can removed from under the base of the dishwasher, But the first thing you need to do is drain the water from the inside using a bowl, I find that the top of a spray tin very useful to remove water from below the filter in the water well.

Remove The Old Drain Pump

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