Lennox 26G10 Defrost Sensor check for flame rollout or

check for flame rollout or secondary limit issues

or the unit staying in defrost mode for excessive periods

making it suitable for fan motors and small pumps

requiring a technician to physically inspect the system and clear the fault before the unit can resume operation

Lennox 26G10 Defrost Sensor check for flame rollout orThe Lennox 26G10 Defrost Sensor is a critical thermistor based control designed for precision management of the defrost cycle in residential Lennox heat pump units. Engineered to monitor the outdoor evaporator coil temperature, this sensor triggers the defrost sequence to prevent excessive ice buildup that can choke airflow and degrade system efficiency. This specific model features an L70 35F temperature rating, meaning it is calibrated to open at