Here are the steps for winterizing your refrigerator:
First, turn off your water supply to the refrigerator.
Pull out the water filter. This system has an automatic bypass. It will not leak water without the filter installed.
Disconnect the water line from the back of the refrigerator and drain it into a bucket.
Next, run the water dispenser for a minute to bleed the pressure out of this system. This refrigerator does not have a reservoir tank in it. The water is cooled in the refrigerator by a coiled up section of water tubing. Bleeding the pressure from this line will protect it from damage.
Disconnect the water line running up the back wall of the refrigerator to the ice maker module. Drain this line and reconnect it.
Leave the ice maker operating until it uses up the water in the water supply system to the ice maker module and ejects any ice remaining in the ice mold. Once the water in this system is used up, you can raise the bale arm to shut off the ice maker.
Once the refrigerator is empty of all food and disconnected from electrical power, prop both doors open to circulate air through the cabinets.