providing the versatile adjustment needed for different linkage lengths

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

or a weak/intermittent spark that fails to ignite the gas valve output

While physically compatible with many shells

this kit includes the 013464F control circuit board

Nordyne 921733 Tube Kit 322057-301 providing the versatile adjustment neededThe 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,