Hi Avogel
The first thing I would do is to check the water inlet valve. remove the bottom panel and check the solenoid for a continuity, then check if the 120V is coming to the water inlet valve at the fill up time. If the power is coming then the water valve is bad and has to be replaced.
If there is no power then check wires and if everything else fine then replace the control board.
- The part number for the water inlet valve
AP2921090
- The part number for the control board
AP3133674
Good luck.
Gene.