Description
The Lennox 15G04 Defrost Sensor Harness is designed to transmit temperature sensing signals from the sensor to the control board allowing accurate monitoring of coil conditions during low-temperature operation. It operates through insulated wiring that carries resistance-based readings from the sensor, enabling the system to interpret frost buildup levels. Commonly used in heat pump and outdoor unit assemblies, it connects between the sensor and control module for proper setup alignment. In HVAC systems, it supports timely defrost cycle response, maintains stable coil performance, and contributes to preventing ice accumulation that can restrict airflow and reduce operational consistency.









