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

The Lochinvar & A.O. Smith 100074316 DV Exhaust Thermistor Assembly is a temperature sensor used to monitor exhaust heat conditions in direct vent heating equipment. Positioned within the vent passage, it detects flue temperature variations by changing electrical resistance and transmitting signals to the control board. The sensor supports burner adjustments, safety responses, and thermal monitoring across HVAC systems by providing exhaust status for equipment control. Its sensing operation allows connected components to receive proper temperature information and maintain controlled combustion response during changing operating conditions throughout equipment operating load conditions.