Lennox 48G63 Supply Air Sensor

The 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 Envirascan technology, the 48G63 accurately detects temperature fluctuations that could lead to system short-cycling, coil freezing, or heat exchanger overheating.

For veteran technicians, the Lennox discharge air sensor is a go-to solution for resolving HVAC error codes related to airflow volume and discharge temperature limits. This OEM part is specifically calibrated for compatibility with Lennox SLP99 gas furnaces and high-efficiency air handlers, providing the necessary data for modulating heat and cooling stages. The assembly features a robust probe design that requires a mounting magnet for secure placement within the supply plenum, allowing for a 3/8-inch duct installation that minimizes interference while maximizing thermal accuracy. Integrating this supply temperature sensor is essential for contractors looking to optimize HVAC system performance and prevent structural damage caused by excessive humidity or stagnant air.

• System Protection: Actively monitors for high-limit or low-temperature conditions to prevent damage to the evaporator coil or heat exchanger.
• Precision Calibration: Optimized for iComfort communicating thermostats, delivering digital accuracy that field-wired universal sensors cannot match.
• Simplified Installation: Features a magnetic mounting flange for quick positioning in the main plenum or discharge ductwork.
• Energy Efficiency: Enables the control board to make micro-adjustments to fan speed and staging, reducing overall HVAC energy consumption.

Where is the best location to install the 48G63 sensor?
For peak accuracy, mount the sensor in the main supply plenum, ideally 19 to 36 inches away from the direct heat source or cooling coil to ensure a representative mixed-air temperature reading.

Will this sensor resolve a "Discharge Sensor Fault" error code?
Yes, if the control board detects an open or shorted circuit in the discharge air temperature sensor circuit, replacing the faulty lead with an OEM 48G63 will typically clear the fault and restore modulating functionality.

Does this sensor require a separate power supply?
No, the Lennox 48G63 draws its low-voltage signal directly from the dedicated sensor terminals on the Lennox integrated control board.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.