Honeywell Phenolic Automatic Reset Thermostats, 2455R Series, 2455R--01000092, Switch Type SPST, Automatic Reset, Close on Rise, Contact Type Silver Alloy, Phenolic, 15 A/10 A, B203S, T146, Operating Temperature 0 °C to 150 °C [32 °F to 302 °F], Open Temperature 65 °C [149 °F], Close Temperature 80 °C [176 °F], Open Tolerance 6 °C [10.8 °F], Close Tolerance 3 °C [5.4 °F]