Reznor 121866 Thermal Switch Evaporator Protection: Automatically shuts off

Evaporator Protection: Automatically shuts off the heater if temperatures reach levels that could damage the evaporator fins or surrounding components

Operating as a SPNO (Single Pole Normally Open) switch

ensuring a precision fit in tight evaporator or condenser coils

Compatible with HCFC

Ensure the furnace is draining correctly to prevent water from backing up into the switch housing

Reznor 121866 Thermal Switch Evaporator Protection: Automatically shuts offFor veteran contractors servicing industrial heating equipment, the Reznor 121866 Thermal Switch is a critical OEM component designed for high precision fan control and limit protection. This F190 30F thermal thermostat is engineered to monitor internal cabinet temperatures, ensuring the blower activates only when the heat exchanger reaches an optimal 190F. By deactivating the blower once temperatures drop below 30F, this switch prevents the