This is a Brand New Rheem/Ruud/Weather King/Corsaire Manual Reset Limit Switch rated at 230 Degrees. The switch has a manuel reset and the Part number is 47-21900-01. This Limit Switch goes on many Rheem/Ruud/Weather King furnaces. Thanks for looking and good luck! If you have any questions or need any other parts contact us.
A limit switch is a safety device designed to shut down a piece of equipment. Limits have a set point, which is in some cases, adjustable. The set point prevents the temperature or pressure from exceeding the rating of the switch.