Before you disconnect the water supply on your refrigerator, turn off the ice maker and/or water dispenser. \
You will have to locate the shut-off valve for the fridge water supply line next. This may be under the kitchen sink, in the crawl space near the refrigerator, in a kitchen cabinet close to the fridge, or in the basement, to name the most likely locations. \
Turn off the valve and then turn off power to the fridge. If nothing else, you can do this by unplugging it. \
Wait about five minutes for the pipes and the mechanisms powering the fridge to cool down. Place a large, shallow bowl or pan under the water supply line to catch any water or debris that comes out of the pipe. \
Find the saddle valve, a T-shaped valve that connects the water supply line to the refrigerator piping. Use a screwdriver to loosen the screws holding this valve in place and remove the saddle valve. \
The water supply line should now be disconnected from the fridge. \