Lennox 48G63 Supply Air Sensor Check your valve body casting

Check your valve body casting or tag to verify the series number before installation

HVAC contractors rely on this 370F rollout switch to prevent cabinet damage and fire hazards in mid-to-high efficiency furnaces

Can I use this as a universal replacement for other 250-degree limits

this gasket provides the exact fitment required to prevent thermal bypass and air leakage

Lennox 48G63 Supply Air Sensor Check your valve body castingThe 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