causing the unit to lockout and prevent the combustion cycle

whistling sounds during the inducer pre-purge cycle

reducing unburned fuel accumulation during start-up

Redundant Safety: Dual-solenoid redundant pilot design ensures the main regulator remains closed unless the pilot is properly established

replacing a pitted or oxidized sensor with a fresh OEM rod ensures the system maintains proper HVAC flame monitoring and operational safety

Lennox 11G26 Sensor 318820-201 causing the unit to lockoutEnsure precise enthalpy control and economizer performance with the Lennox 11G26 Mixed Air Sensor. This genuine OEM Lennox HVAC replacement part (Catalog No. 11G26, Part No. 103931 01) is a high precision thermistor designed to monitor the temperature of mixed air within commercial and industrial ductwork. Specifically engineered for integration with Lennox economizer modules, this mixed air sensor provides the critical data needed to modulate outdoor