I watched the video provided by Appliance Parts Pro on the replacement of the valve. The video was very informative and the replacement was very simple. Replacement of the mullion was even more simple and needed no instructional video. Appliance Parts Pro were extremely prompt in delivering the parts. My only complaint is with the manufacturer, GE, who designed and manufactured a plastic hinge for the mullion. The thin plastic hinge broke after normal wear and stress, and I had to purchase the entire mullion at over one hundred dollars due to a cheap twenty five cent piece of plastic.