Trane ORF0501 Orifice 321042-401 Compact Side Mount: The side

Compact Side Mount: The side mounted auxiliary contact design preserves space on the mounting rail while providing essential multi-circuit control

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

and a main pressure regulator into a single

Check for hairline fractures at the hub where the blades are riveted or welded

Trane ORF0501 Orifice 321042-401 Compact Side Mount: The sideThe 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