International Comfort Products 1320366 Auto Limit Switch 260°F

This is an automatic reset limit switch used to protect furnaces and air handlers from overheating. It is an SPST-NC (normally closed) switch that opens at 260°F and recloses at 240°F, providing a 240°F to 260°F operating range with non-programmable, automatic reset operation. Rated for residential and commercial use, it serves as a safety control that de-energizes the heating element or blower circuit when supply air temperature exceeds the setpoint, then automatically restores operation once temperatures drop within range. This switch is an OEM replacement for International Comfort Products and related brands, including Heil, Tempstar, Arcoaire, Comfortmaker, Snyder General, KeepRite, and Day & Night equipment. It cross-references to OEM part numbers 313312, T-O-D60T11, 60T11, 1643, L260-20F, SWITCHLMT 260-20LA, L/6, and LF18-194. Install difficulty is rated intermediate, requiring basic hand tools. Typical failure symptoms indicating replacement is needed include furnace overheating, nuisance high-limit trips, unexpected shutdowns, short cycling, and failure to reach setpoint temperature.