Confirm that the mixed air temperature sensor and enthalpy control values are within the setpoint range

The 100208399 features a factory-calibrated set point

it manages voltage transitions and signal routing necessary for safe burner sequencing

If the vacuum load is correct but the switch does not close continuity

Fail-Safe Operation: Mechanical spring-return design ensures the valve stem raises to the safe position during total air loss

Lennox X8348 Maintenance Kit 30067439-890 Confirm that the mixed airWhen servicing a Lennox PCO 20C PureAir Air Purification System, using the correct Lennox X8348 Maintenance Kit is critical for maintaining systemic integrity and air quality standards. This comprehensive OEM replacement kitalso identified as Lennox X834801contains the core components required to sustain the photocatalytic oxidation process. The kit includes one MERV 10 pleated filter (nominal 21x26x4), one titanium dioxide coated catalyst insert, and