York S1-025-35306-000 Flame Sensor

Professional-grade furnace diagnostics begin with reliable verification of the burner assembly, and the York S1-025-35306-000 Flame Sensor is the specific OEM replacement part required to maintain system safety. This 4-inch flame sensor features a precise angle bend and a single-hole mounting design, engineered to interface directly with the control board via a standard 1/4 inch male quick-connect terminal. It functions through the process of flame rectification, monitoring the micro-amp signal generated when the probe is engulfed in the burner flame. Designed for high-performance HVAC gas furnaces and package units, specifically compatible with York, Coleman, and Luxaire models like the DF090N10N2AAA3A, this component prevents hazardous unburned gas buildup by signaling an immediate safety shutdown if flame drop-out occurs. The durable ceramic insulator and high-temperature alloy rod are built to withstand the rigors of the combustion chamber, ensuring consistent flame detection and preventing nuisance lockout codes during high-demand heating cycles.

• Direct OEM Fit: Guaranteed mechanical compatibility with York and Coleman mounting brackets, eliminating the need for field modifications.
• High-Temperature Durability: The probe is constructed from robust alloys to resist oxidation and carbon buildup, extending the intervals between necessary cleanings.
• Rapid Safety Response: Provides instantaneous signal feedback to the integrated furnace control (IFC) to confirm ignition or initiate a lockout.
• Standardized Terminal: Features a standard male spade connector for a secure, low-resistance electrical pathway back to the sensor circuit.

How do I know if my York flame sensor is failing?
If your furnace ignites and then shuts down after only a few seconds (typically 2-5 seconds), the sensor likely isn't sending a sufficient micro-amp signal to the control board. Check for soot buildup or cracks in the ceramic insulator.

Can the S1-025-35306-000 be cleaned instead of replaced?
Technicians can often restore a weak signal by cleaning the rod with a fine abrasive like steel wool or a professional cleaning pad. However, if the rod is severely pitted or the ceramic is compromised, a replacement is necessary to ensure reliable furnace troubleshooting.

Is this sensor compatible with other brands?
While primarily a York S1-025-35306-000 genuine component, this part is used extensively across the Johnson Controls family, including Luxaire and Fraser-Johnston equipment.

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.