York S1-025-26392-001 Limit Switch

The York S1-025-26392-001 Limit Switch is a critical safety component designed for precise thermal regulation in York HVAC systems. This OEM replacement part (cross-referenced with part number 208X06) features a Single Pole Single Throw (SPST) configuration with an open on rise switch action. Engineered for high-temperature protection, it is calibrated with a 150°F fixed open temperature to interrupt the burner circuit during an over-temperature condition and a 110°F fixed close temperature for an auto reset function once the heat exchanger cools to safe operating levels.

As a veteran-grade general purpose limit switch, the S1-025-26392-001 ensures reliable furnace high limit protection, preventing equipment damage and hazardous conditions. The rugged construction makes it a staple for contractors maintaining Johnson Controls and York equipment. This switch is frequently utilized in specific York furnace models like the DH060N08N2AAA2A, providing a direct fit that allows technicians to restore HVAC safety circuit integrity without field modifications. Its fixed-point accuracy is essential for maintaining proper furnace temperature control and system longevity.

• Precise Thermal Calibration: Fixed 150°F trip and 110°F reset points ensure consistent HVAC safety limit performance.
• OEM Compatibility: Genuine York S1-025-26392-001 ensures seamless integration with existing wiring harnesses and mounting footprints.
• Automatic Reset: Eliminates manual intervention by resetting the SPST switch automatically after the system reaches safe temperatures.
• Reliable Safety Interface: Designed specifically to monitor furnace temperature and prevent heat exchanger overheating.

What causes a York limit switch to trip frequently?
Repeated tripping of the York S1-025-26392-001 typically indicates restricted airflow across the heat exchanger, often caused by a dirty air filter, blocked return ducts, or a malfunctioning blower motor.

Is the S1-025-26392-001 compatible with other brands?
This is an official OEM part for York and Johnson Controls equipment. While the electrical specs (SPST, 150/110 F) may match other brands, technicians should verify mounting orientation and physical dimensions before installation in non-native systems.

How do I test this limit switch for continuity?
Using a multimeter, you should find continuity across the terminals at room temperature (as the switch is normally closed). If the circuit is open while the furnace is cool, the auto reset has likely failed, and the part requires replacement.

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.