Featuring 3/8 SAE flare connections

ensuring a vibration-resistant fit to the Lennox furnace electrode

This "opens on rise" action prevents heat exchanger damage and ensures safe operating conditions by shutting down the gas valve

This is a manual reset switch (red body)

but you must never replace a capacitor with one of a lower voltage rating than the original OEM specification

Lennox 48G63 Supply Air Sensor Featuring 3/8 SAE flare connectionsThe Lennox 48G63 Supply Air Sensor is a critical diagnostic component engineered for high precision temperature monitoring within residential and commercial air handlers and heat pump systems. Designed to interface directly with Lennox iComfort communication systems, this NTC thermistor based sensor provides real time feedback to the integrated control board, ensuring the HVAC system maintains precise discharge air temperatures. By utilizing patented