Do not put any strong chemicals inside the dishwasher.
Check the air-gap and the drain hose.
Check if the dishwasher will drain with drain hose off the air-gap.
Find Appliance Parts at AppliancePartsPros.com - Largest inventory in the U.S. with 91% of all in-stock orders delivered within 2 business days. Thousands of photos and diagrams make it very easy to find the right part. Enter your appliance model here.