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Replace Drain Pump Bosch Dishwasher

If The Dishwasher Isn’t Filling With Water

How to replace drain pump in Bosch dishwasher
  • Open the door and close it firmly to ensure it’s closed properly.
  • Make sure the water supply valve to your dishwasher is turned on all the way.
  • Clear any debris that may be caught under the float assembly located on the bottom of the dishwasher tub and be sure that it can move up and down freely.
  • Check the display and confirm that your dishwasher is not running in Demo Mode.
  • 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

    Dishwasher Drain Pump for Bosch 00642239 AP3996662 PS8729769 642239

    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:


    Bosch Dishwasher Makes A Low Humming Sound

    Bosch Dishwasher â Drain Pump â Replacement

    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

  • Open the door and close it firmly to ensure it’s closed properly.
  • Make sure that you are closing the door within 3 seconds of pressing start if it has a top-button control.
  • Confirm that it’s recieving power. If lights on the display don’t turn on when you press them, reset the breaker and try again.
  • Check that the Control Lock or Delay Start options aren’t selected on the display–your dishwasher won’t start as expected in these modes.
  • Make sure the water supply valve to your dishwasher is turned on all the way.
  • Clear any debris that may be caught under the float assembly located on the bottom of the dishwasher tub and be sure that it can move up and down freely.
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  • We had had the worse type of problem with our Bosch Dishwasher, sometimes it works, sometimes not. The pump was replaced 11 months ago when a E24 error popped up intermittently. It continued to show after the new pump. We have cleaned filters, examined water supply, pretty much everything we could find. And by the way, your site is the very best weve seen by way of explanation. We now get an E25 code which suggests the pump but Im not convinced. The salt reservoir is still full requiring no replenishment for months! This is surely wrong, we are in a very hard water area. Have you any idea what might be causing this and how we should proceed?

  • Sasha

    I have tried to see if I can clean the pump to get rid of error 24, but it has actually triggered it to change to error 25 now. It did the whole cycle when I tested it, but on the last minute of it comes up with an error. I am trying to put the panel back on the dishwasher, but I have these two plastic parts,which fell out when taking the panel off and I dont know which position they should be in when panels goes back on. Could you please send a photo where they go? Its siemens 45m583au dishwasher

  • Simon

    HiIm getting an E15 fault on my Siemens dishwasher. I know this is water in the base. Where could that be coming from?

  • Recommended Reading: Bosch Dishwasher Replace Drain Pump

    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

    Genuine Dishwasher Drain Pump Bosch 00631200: Large ...

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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

    Dishwasher Not Draining? Drain Pump Replacement #00642239

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


  • Using a screwdriver and the pliers, disconnect the drain hose that is attached to the air gap , drain the water, and check if the hose is blocked. Youll only be able to see the section of the drain thats exposed under the sink.
  • To see if the drain hose is blocked, run the dishwasher on the rinse cycle and hold the hose over the bucket. If the dishwasher doesnt drain, then the drain hose is blocked. You might try to use a plumbing snake or a hanger to push out the clog.
  • If you cant find the clog in the section of drain under the sink, its likely in the portion you cant see, directly behind the dishwasher. Most drain hoses run through a hole in the cabinet and the dishwasher may need to be pulled fully out for closer inspection. Before you pull it out, youll need to unscrew the two L brackets that connect the top of the dishwasher to the underside of the counter. You may also need to adjust the height of the dishwasher by screwing its feet down lower to give you clearance at the top. If this is too difficult, it might be time to call a plumber.
  • 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

    BOSCH Dishwasher SGS5022GB/13 SGS5022GB/20 SGS5302GB/07 Drain Pump

    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

  • Turn the power to the dishwasher off. You can simply unplug it at the wall.
  • If the dishwasher is full of water, empty it by using a small container and a sponge until its completely empty. If you dont empty the water, it will leak out the bottom when you remove the drain pump.
  • Pull the dishwasher out from the wall so you can work on it. You may have to disconnect the water if the hose isnt long enough for you to be able to move the dishwasher out.
  • You can now start taking the dishwasher apart so you can access the drain pump. Start by removing the top panel there are usually two screws at the rear, which you need to remove. Once removed, set the panel aside out of the way. Its a good idea to place the screws next to each component so you know which ones go back into each component.
  • Remove the side panels of the dishwasher by unscrewing the screws there should be two in the front, and some models have two in the back to remove as well. Once removed, set the panels aside out of the way.
  • Remove the front part of the door by unscrewing it be careful not to let the door panel fall onto the floor while you are unscrewing it. Once removed, set it aside out of the way.
  • Remove the kick strip on the bottom of the dishwasher . On some models, it is attached with two screws, and on others, it clips into place. This will give you access to the cover plate. Once youve removed the kick strip, place it with the other parts.
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