York S1-025-35305-000 Spark Ignitor

The York S1-025-35305-000 Spark Ignitor is a critical direct spark ignition (DSI) component engineered for high-performance combustion in York gas furnaces and rooftop units (RTU). This OEM replacement part includes a precision-engineered igniter rod and integrated lead-wire harness with a white connector, ensuring a stable electrical path for high-voltage arcing. Professionals recognize this assembly by its durability in demanding industrial HVAC environments, where maintaining a consistent spark gap is essential for reliable burner ignition and efficient fuel combustion. Replacing a cracked or soot-fouled S1-025-35305-000 ignitor is standard practice to prevent no-heat calls and intermittent flame sensing errors often seen in Johnson Controls and York equipment.

Key Benefits for Technicians:

• Direct Fit Compatibility: Optimized for York models such as the DF090 and DH078 series, reducing field modification time.
• Integrated Wire Harness: Includes a factory-terminated ignition wire with a secure white plug-and-play connector to minimize resistance.
• High-Dielectric Ceramic Insulator: Prevents voltage leakage and premature grounding, ensuring the arc delivers sufficient energy to the gas stream.
• OEM Reliability: Built to Johnson Controls specifications for exact mounting alignment within the burner assembly.

Common Technical Questions:

How do I troubleshoot an S1-025-35305-000 for weak spark?
Use insulated pliers to check for spark arcing to the ground. If the spark appears weak or arcs through the ceramic insulator instead of the tip, the internal dielectric strength has failed, and the unit must be replaced.

Is this ignitor compatible with other brands?
While primarily used in York equipment, this component is also found in Luxaire, Fraser-Johnson, and Coleman systems that utilize the same S1-02535305000 part number.

What causes frequent failure of furnace spark ignitors?
Carbon buildup and thermal stress are the primary culprits. Ensuring the burner pilot tube is clear of debris will extend the operational life of the electrode by preventing localized overheating.

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.