York S1-025-22273-002 Limit Switch

The York S1-025-22273-002 Limit Switch is a critical fixed-temperature safety control engineered for York, Luxaire, and Coleman furnace assemblies. This automatic reset limit switch features a 140°F cut-out and a 100°F cut-in differential, ensuring the heat exchanger does not exceed safe operating thermal limits. As a genuine OEM York furnace part, it provides the precise calibration required for proper high-limit protection, preventing system cycling issues often caused by non-spec aftermarket alternatives. Designed for HVAC high-limit switch replacement, this component monitors plenum temperatures and interrupts the burner circuit if airflow is restricted or heat rise is excessive. The S1-025-22273-002 utilizes a bimetallic disc for reliable mechanical actuation and is rated for residential heating applications. Replacing a faulty or drifting limit switch with this York heating element safety component restores the factory-specified safety sequence and helps prevent premature heat exchanger fatigue.

Key Benefits for Technicians

• Direct OEM Integration: Exact fit for York air handlers and furnaces, eliminating the need for bracket modifications or wiring adjustments.
• Precise Thermal Calibration: Fixed 140-100 opening and closing points ensure the system operates within manufacturer-specified safety parameters.
• Automatic Reset Functionality: Simplifies troubleshooting by allowing the system to attempt a restart once temperatures return to a safe 100°F threshold.
• Enhanced System Reliability: High-grade internal contacts resist pitting and carbon buildup, ensuring a consistent electrical path during normal operation.

Common Questions

What causes a York limit switch to trip frequently?
Repeated tripping of the S1-025-22273-002 is often a symptom of restricted airflow, such as a clogged HVAC filter, blocked return ducts, or a failing blower motor rather than a defect in the switch itself.

Can I bypass this switch for testing purposes?
Temporary bypassing is only for diagnostic continuity testing by a qualified technician; the system must never be left running without a functional auto reset limit switch in the circuit.

Is this switch compatible with other brands?
While functionally similar to other 140-degree limits, this specific York S1-025-22273-002 is calibrated for the airflow characteristics of Johnson Controls-branded equipment (York, Coleman, Luxaire).

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.