York S1-025-37499-000 Flame Sensor

The York S1-025-37499-000 Flame Sensor is a critical OEM safety component engineered for precise flame rectification in high-efficiency gas furnaces. As a veteran-grade HVAC replacement part, this sensor utilizes a high-quality stainless steel rod designed to withstand extreme thermal conditioning without premature oxidation. It is the primary safeguard in the combustion cycle, ensuring the integrated furnace control board receives a steady DC microamp signal (typically ranging from 2.0 to 6.0 uA) to maintain the gas valve circuit. If the sensor fails to detect a stable flame through the ionization process, the system will initiate a safety lockout to prevent dangerous unburned gas accumulation.

This genuine York flame sensor (Part # S1-025-37499-000) features a straight-style element with a total length of approximately 3-7/16 inches, optimized for direct-fit compatibility with York, Coleman, and Luxaire gas-fired equipment. To prevent furnace short cycling or nuisance "no-flame" error codes, this OEM flame sensor should be inspected during annual maintenance for carbon buildup or cracked porcelain insulators. For technicians troubleshooting intermittent ignition, verify a minimum of 1.5 uA for consistent operation.

Key Benefits for Technicians:

• Direct OEM Compatibility: Engineered specifically for York, Coleman, and Luxaire systems, ensuring a drop-in replacement without bracket modifications.
• High-Temperature Durability: The upgraded probe material resists heavy carbon fouling and oxidation better than generic aftermarket alternatives.
• Precision Safety: Maintains the integrity of the flame rectification circuit, preventing hazardous gas buildup and system lockouts.
• Reduced Service Callbacks: Using genuine York parts ensures the signal matches factory specs for the 1NP0807, 1NP0809, and 1NP0810 furnace series.

Common Questions:

• What microamp reading should I expect from this sensor? A healthy York S1-025-37499-000 typically produces 2.0 to 5.0 microamps (uA) DC. If the reading drops below 1.0 uA, it will likely trigger a lockout.
• Can I clean this sensor with sandpaper? We recommend using extra-fine steel wool or a professional cleaning pad. Rough sandpaper can create grooves that accelerate carbon buildup.
• Will this fix a furnace that runs for 3 seconds then shuts off? Yes, that is a classic symptom of a dirty or defective flame sensor failing to send a signal back to the board after ignition.

This item is not eligible for free shipping.

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.