York S1-025-38950-000 Flame Sensor

The York S1-025-38950-000 Flame Sensor is a critical safety component designed for furnace ignition systems, acting as the primary sensor for detecting the presence of a healthy flame through flame rectification. Featuring a 34-inch lead wire, this component ensures the integrated furnace control board receives a consistent DC microamp signal to keep the gas valve energized. This specific model serves as the direct replacement for York 025-27731-701, offering a precise fit for various York, Luxaire, and Coleman residential gas furnaces. For technicians troubleshooting furnace lockout cycles or intermittent burner failures, verifying the integrity of this sensor is standard practice. Replacing a degraded or carbon-fouled sensor restores reliable heating system performance and prevents unintended shutdowns. Ensure proper grounding of the burner assembly to maintain signal integrity across the sensing rod during the ignition sequence.

• Reliable Flame Detection: High-grade rod material withstands constant heat exposure to maintain a precise microamp output.
• Direct OEM Fit: Engineered to drop into existing burner bracketry without housing modifications, reducing time on the job site.
• Extended Lead Length: The 34-inch wire provides ample reach for versatile mounting locations within the burner compartment.
• Verified Compatibility: Specifically engineered as the authorized replacement for 025-27731-701.

• Why is the furnace burner shutting off after five seconds? This symptom typically indicates a failure in the flame sensing circuit, often due to a fouled or failing York S1-025-38950-000.
• Is this compatible with York 025-27731-701? Yes, this is the factory-verified direct replacement part for that specific number.
• What is the standard microamp reading for this sensor? Most York systems require a signal between 2 and 5 microamps; readings below 1.0 microamp will typically trigger a lockout condition.

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.