This yellow-coded thermistor provides real-time thermal resistance feedback to the control board to prevent compressor overheating and liquid slugging

The physical specs are industry standard for many residential units: a 1/2-inch hex head for easy socket engagement

With a 1/8" NPT thread and a 7/16" hex head

Always verify your boiler's BTU rating and altitude requirements before installation

System Reliability: Helps eliminate common ignition failures by providing a steady flame for the thermocouple or flame sensor to detect

Lennox 97H76 Damper Door Spring This yellow-coded thermistor provides real-timeThe Lennox 97H76 Damper Door Spring is a critical mechanical component designed to provide precise tension and return force for damper assembly operations within commercial and residential HVAC systems. Functioning as the primary HVAC damper actuator spring, this part ensures that air mixing dampers and economizer doors return to their default positions upon system cycling or power loss. Engineered for durability in high cycle environments, the 97H76