Hi to you from David, 'The Famous Forry' Your dishwasher has 2 pumps basically. The main pump is the bigger motorised pump and is known as the Circulation pump. This is the pump that fires the water through the spray arms to clean your dishes. The other pump is purely to discharge the used water after the dishes have been washed and then again after the rinsing. This is the pump that may be not working if your gettng water left in the dishwasher. Often a small pieces of broken crockery can block/jam the impellor right inside the pump itself so therefore you need to get inside the pump to see this.
Where are you located please?
Thank you for your time.