The Gutter Guard system features a self-regulating heating cable specially developed to prevent ice formation on most types of gutters. As the heating cable is self-regulating, the heat output regulates to ambient conditions at each point of the cable. It can never overheat or burn out – even when overlapped on itself. In snow and icy water, the Gutter Guard operates at full power. As the snow melts and the water drains away, gutter guard self-regulates to half power while it dries. As it gets warmer, gutter guard gradually reduces its output.