Armstrong Furnace R42640-001 Ignitor/Sensor Els PW 17895 including select Utica Boilers and

including select Utica Boilers and Dunkirk gas boilers

If the pilot flame frequently flickers or goes out due to external drafts

ideal for high-temperature boiler water level controls

Ensure all surfaces are cleaned and the solenoid base is tightened using the provided wrench to prevent mechanical vibration

What causes a drain trap like the 1171917 to fail

Armstrong Furnace R42640-001 Ignitor/Sensor Els PW 17895 including select Utica Boilers andThe Armstrong Furnace R42640 001 Ignitor Sensor is a critical OEM replacement part designed for precise ignition and flame rectification in residential HVAC systems. Engineered as an ignitor sensor less pilot assembly, this component ensures reliable burner cycles by providing the necessary spark and feedback signal to the furnace control board. Transitioning to a high performance silicon nitride ignitor configuration often improves longevity over