Hi buyradio,
I assume since it's a 2012, that you have either a Dometic or Norcold refrigerator, with ice maker.
There's a good chance the 1/4" poly water feed line to the refrigerator is leaking. If it hasn't been winterized, it may have suffered freeze damage last winter. Or it may just have sprung a leak.
The cutoff valves are usually found either in the kitchen, under a cabinet, or behind the UDC (you have to take down the rear wall of the basement storage next to the UDC).
You need to turn the feed line OFF and evacuate the water between the cutoff valve and the solenoid on the back of the refrigerator.
If the poly line is the problem, you may want to replace it with a metal-braided 1/4" feed line.