The Reznor 176680 is a standard-opening natural gas valve designed for precision fuel regulation in heavy-duty unit heaters and industrial furnaces

This is the most common NTC thermistor standard used in commercial HVAC controls

75" WC set point is specific to the blower's CFM and the heat exchanger's static pressure

This specific 71525168 model is a single-speed

What are the symptoms of a failing blower gasket

Automation Components Inc (ACI) A/20K-PBS Sensor 318423-701 The Reznor 176680 is aThe Automation Components Inc (ACI) A 20K PBS Sensor is a high performance 20K Ohm thermistor designed for discreet temperature monitoring in commercial and residential HVAC applications. This low profile button sensor features a compact, aesthetically pleasing design that allows it to blend seamlessly into any environment, making it ideal for high profile architectural spaces. Engineered for durability and flexibility, the ACI A 20K PBS is available