York S1-373-12894-703 Heat Exchanger

The York S1-373-12894-703 Heat Exchanger is an OEM HVAC replacement part engineered for precise thermal transfer in residential and light commercial forced-air systems. This 3-tube furnace heat exchanger is manufactured with high-grade, corrosion-resistant aluminized steel to withstand the rigorous expansion and contraction cycles common in high-efficiency gas furnaces. As a primary combustion chamber component, it ensures the safe separation of combustion byproducts from the indoor airstream, maintaining critical system integrity. For service technicians, the S1-373-12894-703 offers exact-fit compatibility, reducing labor hours associated with field modifications. It is specifically designed to restore the AFUE ratings and thermal efficiency of York, Luxaire, and Coleman units requiring a three-tube configuration. Replacing a compromised exchanger with this genuine Source 1 service part prevents common failure points like hairline stress fractures and rollout issues, ensuring the furnace operates at peak performance throughout the heating season.

• Direct OEM Compatibility: Engineered as a drop-in replacement for York equipment, ensuring all mounting points and port alignments match factory specifications.
• Durable Construction: Fabricated from aluminized steel to resist oxidation and thermal fatigue, extending the service life of the heating system.
• Optimized Heat Transfer: The 3-tube design maximizes internal surface area, facilitating efficient BTUH transfer to the secondary heat exchanger or supply plenum.
• Safety Integrity: Restores the vital barrier between flue gases and the building’s air supply, critical for passing carbon monoxide safety inspections.

How do I identify if my York heat exchanger is failing?
Technicians should look for visible soot in the burner compartment, cracks at the dimple points, or a flickering flame when the inducer fan energized. A combustion analysis will typically show high CO levels if the 3-tube assembly is breached.

Is the S1-373-12894-703 compatible with other brands?
Yes, as a Source 1 part, it is the correct replacement for specific models under the Johnson Controls umbrella, including Luxaire and Coleman furnaces that call for this specific part number.

Does this assembly include the header plate?
This part usually consists of the tube bundle and collector box assembly; however, we recommend verifying your specific serial number to ensure all necessary gaskets for a complete seal are on hand for the install.

This item must ship via truck. Please contact us for freight quote.

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.