Lennox 78M19 Supply Air Sensor R-448A it does not require external

it does not require external start components for standard operation

This specific model is a single-pole 1NC (Normally Closed) assembly

How do I verify it is time for a replacement

flexible heater tapes with appropriate wattage per lineal foot should be used instead

Key Benefits: Precision Fit: Specifically machined for 3" V5013 mixing and diverting valves to ensure seamless integration

Lennox 78M19 Supply Air Sensor R-448A it does not require externalThe Lennox 78M19 Supply Air Sensor (alternative part C0SNSR20AE1) is an essential component for maintaining precision discharge air control in high performance HVAC systems. Designed for integration with Lennox Prodigy Unit Controllers and CORE Control Systems, this supply static differential pressure sensor provides the critical feedback needed for Constant Air Volume Bypass (CAVB) and Variable Air Volume (VAV) applications. Whether you are servicing