Comfort-Aire Heat Controller Rheem Ruud Weatherking Century Furnace Limit Switch - L170-20 - 3" insertion 47-25349-02 Same as Century, Rheem, Protech, Fedders, Weatherking, Aitons' of Canada and RUUD Furnace part number 47-25349-02 We are a re-seller for Comfort-Aire Heating and Cooling Equipment. Call us today for all of your Comfort-Aire Heating and Cooling Equipment parts and accessories needs.