Your dishwasher’s drainage pipe might be blocked, which would stop your appliance from filling with water. Before you do anything, turn your dishwasher off and look for the drain – double check your owner’s manual if you can’t find it. Unscrew the drain catch, take the filter out and remove anything that’s causing a blockage. Once you’ve cleared it out, put the filter back, screw the catch in and try using your dishwasher again.