Most common cause of dishwasher not draining?

[Steve H.]

My dishwasher has started leaving water behind after cycles, and I want to narrow down the likely causes before replacing anything. What are the usual suspects you check first?

 

[Alan]

I usually start with the basics like a clogged filter or food debris in the sump. After that, I check the drain hose for kinks or the pump itself if it’s still not moving water.