Overview Similar Products –> Product Description P65-1 Thermal switch assembly for FK24 Kit 24-48hour lead time Thermal Switch Part 115 degrees F. (1/2 inch disc) This can be added to any of the units that do not come with this switch. Simply place it in line with the power, mount the switch on the housing / jacket so that will allow the fan to come on as the fireplace gets hotter and will also turn it off as it cools down. Cross Reference: R7-RB65, HB-RB65, P65R240 Product Videos Custom Field Product Reviews