Will not drain

This sounds like the pump and/or pipes are blocked or the pump is damaged,
Remove the bottom panel and locate the pump,remove the pipes that are connected to the pump and remove the pump itself check the hoses first and see if you can blow through then with ease,then where the pipes go on the pump look inside a see if you can see any obstuction if not try to turn the impeller (the fan looking blade inside the pump where the hoses go)it should turn freely,If you found a blocked pipe or an obstruction in the pump remove,put together and test.If it still does not work then the pump is no dought the culpret in wich case replace.Remember unplug the unit before working on it and switch of the water.Turn the unit on its back to remove the bottom panel and always check to see all wires are connected when replacing any electrical part.