Dishwasher won't drain

My Bosch SHE4AM12UC01 Dishwasher stopped draining completely. It's the second time it has done this. Back in Mar 2015 it stopped draining and I replaced numerous components including the Drain Pump, Float Switch, Controller Board and drain line. The drain line finally seemed to fix the problem. I installed a longer line that could loop higher under the sink.

It worked fine again until last week. I found the repair manual for the dishwasher and ran the diagnostic test. The first result stated that the drain pump was not functioning correctly. I removed it and cleared the vanes and reran the test and it passed. Now the result is no error lights which is supposed to indicate a bad aqua sensor. Research says this determines if another rinse cycle is needed and the dishwasher should still function without it working.

If I start a cycle, the dishwasher will drain (I can see a nice flow into the garbage disposal). However, if we run a compete cycle there is standing dirty water in the base of the tub.

Any suggestions on what to do next?


Discussion is locked
Reply to: Dishwasher won't drain
PLEASE NOTE: Do not post advertisements, offensive materials, profanity, or personal attacks. Please remember to be considerate of other members. If you are new to the CNET Forums, please read our CNET Forums FAQ. All submitted content is subject to our Terms of Use.
Reporting: Dishwasher won't drain
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.

CNET Forums