Honeywell Ceramic Automatic Reset Thermostats, 3455RCG Series, 3455RCG84230002, Switch Type SPST, Automatic Reset, Open on Rise, Contact Type Gold Alloy, Ceramic, 0.5 A, B226, T147, Operating Temperature 0 °C to 260 °C [32 °F to 500 °F], Open Temperature 77.78 °C [172 °F], Close Temperature 57.78 °C [136 °F], Open Tolerance 2.78 °C [5 °F], Close Tolerance 4.44 °C [8 °F]