ensuring the precise fuel-to-air ratio required to maintain thermal efficiency and prevent soot accumulation within the combustion chamber

protecting the sensing element from high-pressure flow while maintaining a tight thermal coupling for accurate RTD sensor feedback

providing the versatile adjustment needed for different linkage lengths

It is the direct replacement for the AP9012B-6 part number

FFRT: Provides rapid flame failure response to meet strict safety protocols and technical specifications

Nordyne 921733 Tube Kit 322057-301 ensuring the precise fuel-to-air ratioThe Nordyne 921733 Tube Kit is a critical OEM HVAC replacement part engineered for exact compatibility with residential and commercial air handling and condensing units. As a veteran grade HVAC technician kit, this assembly eliminates the need for field fabricated piping, ensuring that refrigerant line connections maintain factory spec flow rates and pressure tolerances. Whether you are performing a mid season repair or a full system overhaul,