Pre-calibrated Accuracy: Opens at 160°F and closes at 130°F

Cross-reference the 11044101 part number with your unit's service manual

preventing unnecessary system lockouts

the switch is performing its safety function to prevent damage to the heat exchanger

If you have no continuity and the temperature is below 155°F

York S1-025-38950-000 Flame Sensor Pre-calibrated Accuracy: Opens at 160°FThe 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,