To use the ice maker after seasonal storage:
1. remove the tape and plastic bags from the end of the water supply line, the end of the ice maker water line, and the water solenoid valve.
2. connect the ice maker water line to the water solenoid valve.
3. connect the garden hose adapter to the water solenoid valve.
4. push the ice maker arm down into the ON position.
5. open the vehicle water supply valve to the ice maker.
you should discard and not use the first 2 batches of ice cubes. It will take about 3 cycle for the ice maker to make fully formed and clean ice cubes.
If you are unable to find your manual:
NORCOLD 121X AC SERIES OWNER'S MANUAL Pdf Download.