this specific part is a natural gas pilot orifice

55" WC pressure switch to fail

ensuring it measures true ambient air rather than radiant heat from the building

ensuring long-term operational stability for the cooling plant and reducing emergency service calls related to sealing solutions for HVAC

Always verify the schematic on the unit's access panel to ensure the R621 designation matches your specific application

Armstrong Furnace R36447B006 Pilot Assembly Els PW 17895 this specific part is aThe Armstrong Furnace R36447B006 Pilot Assembly is a critical OEM replacement component engineered for precision ignition in residential heating systems. Designed specifically for standing pilot furnace repair, this assembly ensures consistent flame rectification and burner ignition, maintaining the safety and efficiency of the combustion cycle. As a direct fit R36447B006 HVAC part, it features heavy duty construction to withstand high temperature