how to back flush your water lines
Start by turning off the water at the source. Disconnect the supply line from the inlet valve and place it into a bucket. Turn on the water supply and flush out the supply line. After thoroughly flushing the line, turn off the water and replace the supply line onto the inlet valve. Next disconnect the other line(s) from the inlet valve and allow the water to drain into the bucket. Follow the line up the back of the freezer and remove any fasteners holding the line in place.