Lochinvar & A.O. Smith 100274734 Flue Sensor 320735-701 When the system is running

When the system is running

Durable Construction: Built to withstand the high-temperature environments of modern furnace cabinets without setpoint drift

ensuring the natural pilot assembly maintains the specific 30-750mV output range required for A

this kit eliminates the guesswork of cross-referencing superseded parts

OEM Precision: Guaranteed compatibility with York and Johnson Controls equipment

Lochinvar & A.O. Smith 100274734 Flue Sensor 320735-701 When the system is runningThe Lochinvar & A. O. Smith 100274734 Flue Sensor is a critical safety component designed for high efficiency condensing boilers and water heaters. This exhaust temperature sensor monitors the heat levels within the venting system to prevent heat exchanger damage and plastic vent meltdown. Also identified by part number TST2013, this NTC thermistor provides the control board with precise resistance readings, ensuring the unit modulates or shuts down