Lochinvar & A.O. Smith 100074316 DV Exhaust Thermistor Assembly

The Lochinvar & A.O. Smith 100074316 DV Exhaust Thermistor Assembly is a sensing component used to monitor temperature in compatible direct-vent heating and water heating systems. It detects heat levels within the exhaust pathway and sends signals to the control board to support proper firing control and system monitoring in HVAC systems. This assembly is typically mounted near the vent outlet where combustion gases pass through during operation. Within systems it is used in gas-fired boilers and water heaters to track exhaust conditions, assisting control logic in regulating burner operation and vent performance.