I had a similar problem with my dishwasher, I don't use it very often, but some time ago I change out my garbage disposal with a new one because the old one burnt out. As it turned out when I did finial decide to use the dish washer it would not drain in either cycle. When I check out the dish washer I disconnected it from everything to pull it out of the place so I can check to see if the pump was working so, I pulled it out and plug it back up and turned it on with the hose that connects to the garbage disposal hanging over the sink, as it turns out it drained just fine, when I went to hook it back up the proper way I check out the garbage disposal and found that there was no hole where the hose from the dis washer was supposed to connect to. Check to see if you have a hole for one and two see if it is clogged.

Check flap valve and solenoid-Check for hose kinks or food clogs-Check pump impeller for damage-Check-timer Check the (check-valve flapper) some models have a check valve located where the drain hose attaches to the dishwasher.If you just installed an garbage disposal check the knock-out plug at the connection.Check that the pump hasnt gotton stuck due to lack of use or gunk in the pump. 3 things 1-You can remove the lower kick panel and turn the fan blade on the motor until it turns freely 2- Boil a big pot of water and pour it into the tub part let it stand for 15 to 20 min then try the dishwasher 3- Or my (FAV) duct tape your shop-vac to the waste hose and try to blow or **** out the stoppage. Rice is a big problem and pasta for dishwashers and thanks for the advice on my car I will try the method,and sorry about the comment