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This type of problem can come from the drain hose or the drain. So, would first check there to be sure that you do not have an obstuction or improperly installed drain hose.
The hose should go up and then down to the sink's drain.
This link will give you diagnostics for the machine that you can run -
Click here - Dishwasher
Let me know how you make out and if you would like more information.
You're welcome. Let me know how you make out. I will be happy to give you more information if you would like.
Use what ever time frame works best for you. Remember to post back to this question and do not start another question.
Please do not accept unless you are happy that the information has helped you. I really do want my customers to be happy.
No rush needed. When ever it's convenient for you. Thank you for the update.
Your welcome and thank you for the accept.