Question about Bosch 24 in. SHX33A02 / SHX33A06 Free-standing Dishwasher

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Bosch SHX33 drain pump continues to run

About two year old d/w has progressively kept running longer and longer after draining. Now it just tries to drain full-time. No water enters after reset and starting new wash cycle. All filters clear. Water runs very quickly through entire drain system. Drain pump would continue to run for hours if left alone.

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  • kenlenard Nov 28, 2008

    Same problem. Ours ran for a bout 6 hours while we were out. Came back & pump was running, dished were clean and no water was in the d/w. I tried to cancel but it will not work. I turned off the breaker to see if it will reset.

  • msk9 Apr 23, 2009

    We run dishwasher when we go to bed. Got up next morning and unit was humming. Opened door to find it full of water. Played around and got it to drain. Now the drain runs all the time I have added water and it will pump it out but still runs even with the door open. Have reset the circuit breaker still the same thing.

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3 Suggested Answers

Krazytech
  • 725 Answers

SOURCE: Bosch SHX46A02UC-21

float switch is in the flood position and the drain pump is running.. there is water under the dishwasher or that switch is stuck up..

Posted on Aug 21, 2008

  • 1 Answer

SOURCE: Bosch Dishwasher wont drain

Crazy! I have the EXACT same problem....sounds like it wants to drain...but won't ...Water has been stuck in the bottom for days now

Posted on Jul 18, 2009

SOURCE: My Bosch shx46A05UC no longer will drain.....it

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!

Cheers!

Posted on Mar 20, 2010

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Your dishwasher is stuck in flood mode. Bosch dishwashers are built with flood switches located in the bottom base pan of the dishwasher. The flood switch is connected to a rod that activates a small interlock switch. When water enters the base pan on a Bosch dishwasher, a Styrofoam puck lifts the rod, activating the flood switch.

When the flood switch is activated, the dishwasher will go into a no-fill, only-drain mode. The drain motor may also run with the door open to the unit. This is definitely a sign there is water in the base pan. This can be caused by the drain being clogged. There are two ways to fix:

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If the base pan keeps refilling with water and the no-fill problem returns, there is definitely another issue, such as a clogged drain. At this point, you need to decide whether to invest in an expert evaluation by a certified Bosch repairman and make the necessary repairs, or buy a new dishwasher.

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1 Answer

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The first thing that a modern dishwasher does before it begins to fill with water is run the drain pump.  It appears that this DW is not progressing to the next cycle (inlet water) and because the pump runs even when the door is open, I agree that the controller card may have failed.
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