Lennox 21L99 Flame Sensor This round dual run capacitor

This round dual run capacitor has a 2-inch diameter and a case height of approximately 3

Is this required for a standard wallbox installation

This eliminates the need for complex matching codes when replacing belts in multi-groove drives

As a critical heavy hammer type component

often required for larger jackshaft clamp applications

Lennox 21L99 Flame Sensor This round dual run capacitorProfessional grade Lennox 21L99 Flame Sensor is a critical OEM replacement part designed to maintain pilot and burner safety through precise flame rectification. As a veteran preferred component, this sensor is engineered to monitor the furnace flame and provide the necessary DC microamp signal to the control board, ensuring the gas valve remains energized only when a safe ignition is confirmed. It serves as a direct OEM replacement for the Lennox