York 1NP0459 Natural To LP Kit

The York 1NP0459 LP conversion kit is the critical OEM component required for field-converting York, Luxaire, and Coleman gas-fired furnaces from natural gas to liquid propane. This kit serves as the direct 1NP0442 replacement, ensuring that the burner manifold pressure and orifice sizing align with the higher BTU density of propane fuel. Proper implementation of this natural to LP conversion is essential for maintaining optimal combustion parameters and preventing carbon monoxide production or heat exchanger fatigue. The kit includes high-tolerance burner orifices, a pilot orifice if applicable, and a specialized York furnace gas valve kit spring to recalibrate the regulator. Utilizing this HVAC gas conversion kit ensures the equipment operates within factory-specified manifold pressures, typically 10 inches water column for propane. Technicians should verify the furnace model serial digits to ensure compatibility with modern TG and TM series condensing and non-condensing units.

• OEM-grade components ensure precise manifold pressure regulation and combustion safety.
• Direct supercession of the 1NP0442, providing an exact fit for older furnace gas valves.
• Includes mandatory conversion labels to meet local mechanical codes and inspection requirements.
• Designed for long-term reliability in high-cycle heating applications.

Is the 1NP0459 compatible with all York furnace models?
No, this kit is designed for specific furnace series such as the TM8, TM9, and TG9. Always cross-reference the furnace rating plate with the manufacturer's parts list before installation.

What is the difference between the 1NP0459 and 1NP0442?
The 1NP0459 is the current factory-authorized replacement that replaces the now-obsolete 1NP0442 part number while maintaining the same technical specifications.

Does this kit require a manometer for installation?
Yes, technicians must use a digital manometer to verify the inlet and manifold gas pressure after the conversion components are installed to ensure safe operation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.