Bosch Dishwasher, Water on Floor

Dishwasher Repair
1

In troubleshooting where water came from, I found no leaks on any hoses or O-rings or seal underneath dishwasher. However I did find that water from the drain or pumpout hose connection that I have connected to my garbage disposal can back up( back flow) into the dishwasher tub and overflow the tub. This apparently happened when disposal had too much solid material(grits) and did not allow water to drain. While this scenario has happened many times with my disposal, this is the first time that water backflows into the dishwasher.

My question is this. Is ther a backflow preventer such as a checkvalve in the dishwasher pump or flapper of some sort that is malfunctioning??

Thanks
Glen

2

I researched this model number and I do not see a check valve in the pump. Have you tried to raise the drain hose above the connection to the disposal to create an air gap. I’m posting a link to the component parts break down. Hope this helps.
Component assemblies replacement parts for Bosch SHU43C06 UC/14 (FD 8211-) | AppliancePartsPros.com

3

My drain hose was lower than the connection and I have since raised it to form an air gap. Thank you for the response and the link.

Glen