ensuring a bubble-tight seal and reliable shifting for pneumatic valve systems managing air

Advanced Diagnostics: Multi-color LED provides instant status of oil pressure and timing circuits for faster service calls

The included user interface manages the interface between the motor and the HVAC controls

System Protection: Optimizes condensate drainage to prevent moisture buildup

which is vital for preventing soot buildup and ensuring reliable gas burner ignition

Lennox 12L09 Flame Sensor 321894-708 ensuring a bubble-tight seal andThe Lennox 12L09 Flame Sensor is a critical genuine OEM replacement part engineered for precise flame rectification in Lennox residential furnaces and heating units. This HVAC flame sensor functions as a safety probe, generating a microamp signal to the integrated furnace control board to verify successful ignition of the burner assembly. If the sensor detects a loss of flame, it triggers a system lockout to prevent hazardous gas accumulation. Built