Its surprising how often our technicians are called out to a dishwasher or washer with issues filling, only to find on installation the owner has kinked the hose.
If self installing your appliance, make sure the hose is free to fill the machine, is not pressed too firmly against the wall and the hose has not kinked.
Bear in mind the drain hose should also be free to empty the machine as well, and if it does not, you may be stressing the pump. If that continues, you may be up for a new pump.
To ensure your appliance is correctly installed, you can contact us on 36301611 and arrange for an experienced technician to come and install it for you.