Open the door of the unit on the front left is a float make sure the float is down all the way.
We need to find out if the water valve is getting power.Becuase if it is the valve is bad if its not it could be a bad float switch.
So do I need to get a voltage tester to test the water valve? Is this a common problem?
It is pretty common and having a tester will help with all your appliance repairs if you use this site.
The water level switch it is next to the valve check to see if it is getting power.