Dometic and Norcold have slightly different solenoids for ice maker water control, but the basics are the same: disconnect water line into and out of the solenoid so it can drain. Also drain the line that feeds to the solenoid (blowing it out with compressed air works fine). The solenoid is on the back of the fridge, accessed from the outer door.
If you run antifreeze or used compressed air, you can wait long enough for the ice maker to cycle and push the air or pink stuff trough, so you don't have to disconnect lines. But if you don't want to wait (with frdige cold and ce maker on), disconnecting lines and draining is the only way.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL