I installed the PulletShut about a year ago. I haven't had any problems with it freezing up and not working this winter. We get snow, rain, and well below freezing temps. The only thing I did to protect it was put a little roof over the door. It doesn't cover the whole door when it's open but it covers the hinge area. My only problem has been when the hens perch on the door jam and poop. Then the poop freezes so the door won't shut all the way. To remedy that I just hung an ice scraper (for car windows) on the side of the coop and chisel any door blocking poop away when I feed. Problem solved. I was impressed that the door stopped when it couldn't close all of the way and didn't keep trying and strip the gears.