Unplugged refrigerator. Took cover off the back inside compartment in the freezer side and used hair dryer on hot to defrost the frozen coil. Once defrosted, unclipped Defrost Limiter Thermostat from top of coil, cut wires, stripped wires back less than 1/2 in., did the same to the wires on the new Defrost Limiter Thermostat, easily matching colored wires together and used appropriate wire connectors and covering with electrical tape. Clipped Defrost Limiter Thermostat back on. Put cover back on, plugged refrigerator back in and it has functioned properly since.