Question about Bosch 24 in. SGS43C12 Classixx Free-Standing Dishwasher

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Water is not draining from Bosch Dishwasher 10 yrs old

The cirlce washes but the water does not drain away form the bottom. We cleaned filter but there is no obvious blockage or being able to unscrew further down to sump to see if there is lower blockage. Our machine is between 5-10yrs old. Do not if this is easily fixed or should we be looking to buy another? Please advise

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Also check out this troubleshooting guide, it should cover everything needed:
Common Bosch Dishwasher Problems And Solutions

Posted on May 31, 2019

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Give this video a try. There are lots of places where gunk can build up and this video shows you how to do it on a Bosch dishwasher.

Posted on Dec 04, 2017


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Hi there,
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Posted on Jan 02, 2017

  • 105 Answers

SOURCE: bosch classixx dishwasher not draining

try removing pump some models can be serviced fron inside well of machine glass can stop the pump from turning
clean out water and remove filters find a screw in base of well remove and remove pump housing check with torch to see if any obstuctions there if not see if the impellor moves around when turned and make shure that the pump is not worn out

Posted on Feb 24, 2008

  • 131 Answers

SOURCE: bosch dishwasher

1. Check for a clog in the air gap:
That's the silver dome on the back of the sink. Not all homes have an air gap for the dishwasher. (Though it is highly recommended!) Lift off the silver cover. Unscrew or unclip the plastic cap on the top. Look inside. Toothpicks are often found there.

2. Check for debris in the sump by:
Remove the lower rack, the lower spray arm, and screens. Use a #15 Torx bit to remove the cover over the drain pump suction. The hole leading to the drain pump is on the left at the bottom. Remove any debris you find.

3. If you find no debris, you almost certainly need a drain pump. After clearing any clogs, if you hear the drain pump humming, but it doesn't turn, replace the pump.
Comment back if you directions for this.

Good luck!

Posted on Mar 12, 2008

  • 8619 Answers

SOURCE: Bosch dishwasher has water in bottom after cycle is complete


Kindly check for the following :

Check for hose kinks or food plugging drain hose. Start at the drain port exit.
Check the check valve and drain hose for debris.
Check pump motor for reversing during the pump out make sure the dishwasher is pausing between the wash and drain cycles letting the pump/motor reverse for the drain cycle.
Check pump motor assembly for a drain solenoid, during the pump out make sure the solenoid makes that distinctive "clunk" noise
If you have recently installed a new garbage disposal, check knock-out plug at connection.


Check pump impeller for damage.
Check that the water inlet valve isn't seeping fresh water into the dishwasher when off.

Please contact for any further clarifications.

A Fixya Rating would be appreciated if.


Posted on Feb 13, 2009

  • 198 Answers

SOURCE: bosch dishwasher wont drain

You can check the drain or the filter. You will have to pull it out of the space it is now to access it. Items will get stuck in the drain clogging it.

Posted on May 31, 2009

SOURCE: My Bosch shx46A05UC no longer will

I ran into the SAME problem with my Bosch SHX46A06UC /21. The problem ultimately ended up being a clog in the air gap vent, (meaning, SOMEBODY ran the dishwasher without the bottom filter being in place or not in place properly). Remove the air gap cover and upper surface nut to drop the air gap vent into the area under the sink. Disconnect the hoses from the air gap vent filter (placing a bucket under the hose from the dishwasher). Run the drain cycle on the dishwasher. The washer should drain into the bucket and let you know that your pump works and that there are no clogs or kinks in the drain hose. (This will also remove the clog if so). The air gap vent's smaller hose connection is MOST LIKELY where your clog is. Look at the upper end of the air gap vent. You'll see a couple of clips on opposite sides of each other, that hold the air vent cap in place. Using a small screwdriver, (or your hands if you can), depress the clips (or one at a time) to get to the point where you can pull the vent cap off the filter. Either use water or a thin, long blade screwdriver to force any objects out of the filter. You should now have full flow through both branches of the filter. Using water and a rag, clean the vent cap and filter. Mount the air gap vent filter back onto the sink. Reconnect the hoses and remove the dishwasher's internal filter(s) and clean them as well while you're at it, making sure to remove any debris that might remain underneath the filter and has the chance of clogging the unit again.

Run the washer again to test. You should be good!


Posted on Mar 20, 2010

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