York S1-025-35380-000 Limit Switch

The York S1-025-35380-000 Limit Switch is a critical high-temperature safety component engineered for mobile home furnaces and standard residential air handlers. Operating as an L140-30F auto-reset limit switch, this genuine OEM replacement part is calibrated to open at 140°F and close at 110°F, preventing heat exchanger damage during restricted airflow or blower failure. Designed for broad compatibility, this furnace high limit switch fits primary heating systems from York, Coleman, and Luxaire, specifically supporting DGAA, DGAH, DGPA, and DGHP model series. The SPST snap-action mechanism ensures a rapid response to thermal fluctuations, maintaining combustion safety without requiring manual intervention after cooling. As a field-proven HVAC safety switch, it features an industrial-grade enclosure to resist dust and moisture, ensuring consistent continuity in demanding blower compartments. For contractors performing preventative maintenance or safety fault repairs, this York replacement part provides a direct-fit solution to restore unit integrity and prevent nuisance tripping in high-static environments.

• Precise Thermal Calibration: Factory-set to trip at 140°F (Open) and reset at 110°F (Close) for reliable system protection.
• Automatic Reset Logic: Eliminates manual resets by restoring the circuit automatically once downstream temperatures stabilize.
• OEM Engineering: Specifically designed by Source1 for York, Coleman, and Luxaire equipment to ensure exact electrical values and mounting alignment.
• Universal Compatibility: Fits common furnace models including DGAA056, DGAA070, DGAH056, and DGAH077 series.
• Durable Construction: Built to withstand the high-cycle demands of industrial-grade residential furnaces.

Is the S1-025-35380-000 a direct replacement for my furnace?
This part is the primary limit for several York and Coleman mobile home furnace units. Always verify the temperature stamping on your existing switch—this model is rated for an L140-30F configuration.

Can I use an auto-reset switch in place of a manual reset switch?
No. Safety components must match the original equipment specifications. This auto-reset switch should only be used where the manufacturer specifies an L140-30F automatic type to ensure proper safety sequencing.

What causes this limit switch to trip repeatedly?
Frequent tripping usually indicates restricted airflow, such as a clogged filter, dirty evaporator coil, or a failing blower motor. If the switch remains open or fails to close at 110°F, it likely 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.