York S1-025-26366-006 Switch

The York S1-025-26366-006 Fan & Limit Switch is a mission-critical component engineered for precise thermal regulation within York, Coleman, and Luxaire gas-fired furnaces. This HVAC fan limit switch performs a dual-function role: cycling the blower motor to optimize airflow and providing essential furnace high limit control to protect the heat exchanger from structural damage due to overheating. By utilizing a factory-calibrated bimetal sensing element, the York S1-025-26366-006 ensures the blower engages only when the plenum reaches the appropriate temperature and interrupts the burner circuit if safety thresholds are exceeded. As an OEM York replacement part, it provides the exact electrical specifications and response times required by the original manufacturer’s safety sequence. This fan and limit control is built for high-duty cycles, ensuring reliable switching for both 24V control signals and 120V blower loads. When installing, technicians must confirm the thermal setpoints and probe insertion depth match the specific furnace model requirements to maintain proper combustion air and equipment safety tolerances.

Key Benefits

• Original Equipment Manufacturer (OEM) Quality: Ensures exact mechanical fit and electrical integration with factory-installed safety circuits.
• Dual-Function Performance: Combines blower management and high-limit safety cut-out to streamline furnace operation and component protection.
• High-Accuracy Sensing: Sensitive bimetal probe provides rapid response to temperature fluctuations within the heat exchanger plenum.
• System Reliability: Prevents short-cycling and thermal stress on the heat exchanger by maintaining strict temperature differentials during the heating cycle.

Common Questions

What are the signs that a York S1-025-26366-006 needs replacement?
Usually, if the furnace blower runs continuously despite the thermostat being set to "auto," or if the burner trips on a high-limit error while the heat exchanger is within normal operating temperatures, the internal switch contacts or bimetal element may have reached its end of service life.

Is this switch compatible with other furnace brands?
While primarily designed for York, Coleman, and Luxaire equipment (Johnson Controls parts), compatibility is determined by the specific temperature setpoints and mechanical dimensions. Always cross-reference the original part number on the existing component before field replacement.

Why is the probe length important for this fan and limit control?
The insertion depth is critical for safety; the sensor must be positioned in the direct path of the airflow as specified by the furnace design to accurately monitor the plenum temperature and respond immediately to potential overheat conditions.

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.