I just bought a house with a 4 year old dishwasher. It has not been used in a year but went through a winter without heat. It was never run because the water was turned off when we inspected the house. I found the solenoid valve leaking and have now replaced it. Now when I turn on the unit it acts like it is starting but there is no water flow. I have checked the connections to the new solenoid and they are as before. Does something need priming or anything. It hums for about30 seconds and then shuts off. help.