Trane ORF0501 Orifice 321042-401 Larger sizes require different replacement

Larger sizes require different replacement part numbers

or if the control board flashes a 4-light diagnostic code

and a main pressure regulator into a single

4-pole contactor engineered for demanding HVACR applications

Trane ORF0501 Orifice 321042-401 Larger sizes require different replacementThe Trane ORF0501 is a precision engineered #44 Standard Fire Orifice designed specifically for compatible Trane furnace models and gas heating systems. As a critical combustion component, this brass orifice regulates the essential fuel flow to the burner assembly, ensuring the correct gas to air mixture for stable ignition and consistent thermal output. Measuring approximately 5. 7 inches in length, this OEM replacement part provides the exact