Without the information requested in my previous response, I can only give you a general answer, but I hope this helps.
Please try this:
You will have to unplug the appliance and remove the bottom front flap.
Then keep some beach towels and shallow container under the filter.
Now, rotate the drain pump filter anti clockwise to open, clean it completely and make sure it is not clogged.
Also with your fingers check if impellor rotates, then reconnect everything and plug it back.
Then remove the top off the appliance and locate the pressure switch with thin hose attached to it.
Now, remove this hose and blow through it, make sure it is not clogged.
Then with the top off the appliance, locate the hoses going into dispenser and clean them completely.
Also clean the inlet hose and inlet valve.
Then try a empty program on its hottest setting and it should work.
If the issue is still there then I am afraid the motor and/or control is faulty and will need replacement.
I hope this helps, please do not hesitate to ask any follow up questions.
I hope you enjoyed your experience with justanswer.co.uk today.
Have a wonderful evening.