York S1-025-27741-001 Limit Switch

The York S1-025-27741-001 Limit Switch is a critical safety component designed for precise thermal monitoring within furnace and air handling assemblies. This SPST (Single Pole Single Throw) configuration features a specific temperature profile of 70°F Open / 80°F Close, making it an essential replacement for keeping equipment within safe operating parameters. When troubleshooting a system that is short-cycling or hitting a hard lockout, verifying the continuity of the OEM York limit switch is a standard first step for any service call. This part is engineered to integrate seamlessly with specific York model E2FB120A46A units and related HVACR systems. By ensuring the high limit control activates at the exact factory-calibrated setpoint, you protect the heat exchanger and maintain consistent airflow. Avoid generic alternatives; this genuine S1-025-27741-001 ensures electrical compatibility with existing control boards and wiring harnesses without the need for field modifications.

• Precise Thermal Calibration: Features a fixed 70Op 80Cl setting for accurate response to overheating conditions.
• Direct OEM Replacement: Designed specifically for York heating and cooling parts, ensuring exact physical fits and terminal alignment.
• Enhanced System Safety: Provides reliable limit control to prevent damage to the furnace heat exchanger during airflow failure.
• Durable Construction: Built to withstand the harsh environments of residential HVAC systems, maintaining switch integrity over high cycle counts.

How do I test the York S1-025-27741-001 for failure?
Using a multimeter set to continuity, check the terminals while the switch is at room temperature. For this SPST limit switch, you should typically see continuity when closed. If the circuit remains open at the incorrect temperature, the switch has failed and requires replacement.

What causes this limit switch to trip frequently?
Frequent tripping is usually a symptom of restricted airflow. Technicians should inspect for clogged air filters, blocked return air grilles, or a failing blower motor before determining if the HVAC high limit switch itself is faulty.

Is this switch compatible with other York furnace models?
While it is primarily cataloged for the E2FB120A46A series, it may serve as a cross-reference for other York and Coleman units. Always verify the temperature stamping on the original part to ensure the 70°F / 80°F range matches the manufacturer's specification for that specific serial number.

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.