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Question about Bosch 24 in. SHX99A15UC Stainless Steel Dishwasher

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Bosch Dishwasher won't drain, cancel drain lights blink

Got a Bosche Dishwasher that doesn't drain or make a sound when I try to cancel drain. When I press both buttons to cancel drain then close the door, the machine doesn't make any noise. I assume the solenoids are not activating or it's not gettin the power to start the pump or know to start draining. The Hose, airgap and stainer are all clear. There is nothing obstucting the drain flow. The two buttons you are required to press simultaniously to cancel drain will start to blink at the same time when I depress them while powering the DW up. They continue to blink whether I close the door or not. No noise comes from the mach. either way. When the DW is in the power "on" postion, the Drain bypass buttons will not light nor do anything when depress simultaniously. It is only when I turn the machine "off" and then back on while pressing both buttons that I will get them to start blinking simultaneously, hoping to engage drain. While they are blinking, I close the door but nothing happens. No noise like a clog or obstuction. Just the lights continue to blink. I can turn the power off and back on, and that clears the blinking lights. I can run a wash. but can't get it to engage the drain bypass cycle. or pump water out. Why are the lights blinking? Why can't I hear the pump or solenoid engage or try to start draining (as thought a object is stuck in the propellers?) Is there a reset to the drain motor or a fuse? Can I put a volt tester on terminals to check pump or solenoid activation at the point of connection?

Posted by john cusack on

  • 1 more comment 
  • john cusack Jun 05, 2007

    I won't be able to run another cycle until it is installed in my new apartment next week. I will see if the machine acts "norm" up to the point of draining. I would say yes. What does the mother board or chip cost or how can I test mode to see if this is the culprit? thanks

  • iko buljan Feb 08, 2008

    cleaned filter, drain hose, etc. it goes through the cleaning cycles, but does not drain completely; a pool of water left on bottom, approximately 2 inches deep.

  • Anonymous Mar 23, 2014

    the start button lights blink, but when I press the button, nothing happens



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I had a similar problem and called out an engineer. When he ran it on rinse it worked fine. Said the micro chip had got confused because I kept pressing buttons. Worked fine for a few weeks and has started playing up again. I have reset it again and hope for the best!

Posted on Jan 04, 2008



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When you said "I can run a wash", does the machine act normal for that time frame up to the point of drain? if yes, the pump is fine. sounds more like the micro chip on the board is "confused", but not sure why.

Posted on Jun 04, 2007


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Related Questions:


Motor keeps running. Water heats fine. Help

One of the reasons for motor not draining during normal cycle is the check valve is stuck. It is meant to return to normal during drain cycle but close during wash. I think the cancel is resetting it and letting water out.
See this discussion.

Our dishwasher won't drain completely. I ran it through a regular cycle but it was left with water in the bottom.

Have you tried canceling the cycle? To cancel, turn the on/off switch to on, then press and hold for three seconds the two buttons labeled "Cancel Drain". Keep the door closed for the next minute so that the dishwasher can complete the cycle. During this time the pump will remove any water from the washer. Also you will notice that Bosch dishwashers always leave a little water in the system to keep the seals from drying out and going bad.
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Open the door. Within 3 seconds press the following sequence --Try pressing normal wash, heated dry, normal wash, heated dry, normal wash, heated dry three times within 6 seconds and then press cancel to reset the dishwasher. If that doesn't help then try pressing Saini Rinse, Heated Dry, Saini Rinse, Heated Dry, Saini Rinse, Heated Dry or Saini Rinse, Air Dry, Saini Rinse, Air Dry, Saini Rinse, Air Dry 3 times in 6 seconds and then the Cancel Button. Close the door and press Cancel.
Blinking lights would stop and should be able to use your dishwasher normally. If the light is still blinking try and reset the power to the dishwasher and try again. If still the light is blinking then check for the connections on the keypad, it may be due to moisture or shorted connections on keypad.

Hope this helps... Please post back if you need more information.



1- machine operates with the door open. 2 - water

So if I fixed it you want me to give that info to you for free but otherwise you want to charge me for an answer?

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Make sure the drain pump is clear of any blockages and obstructions and that the drain hose wasn't kinked when you re-installed it.

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i know this sounds daft but --
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Found this on the Bosch website..... see 2nd to last step
The Cycle Completion Signal
This Cycle Completion Signal is a tone that sounds to alert you when your dishwasher
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To activate:
· P ress and hold the right “Cancel Drain” button then press and hold the On/Off button.
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· P ress the right-most “Cancel Drain” button until the tone is either at the desired volume
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