Reznor 121866 Thermal Switch Once the system cools to

Once the system cools to the 96°F reset point

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

ensuring a precision fit in tight evaporator or condenser coils

Compatible with HCFC

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

Reznor 121866 Thermal Switch Once the system cools toFor 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