York S1-025-27792-708 Limit Switch

The York S1-025-27792-708 is a high-precision 170F M/R Limit Switch engineered for critical high-limit protection in residential and light commercial HVAC furnaces. As a safety-critical auxiliary limit switch, this manual reset component monitors internal heat exchanger temperatures, providing a fail-safe cutoff to prevent dangerous overheating if airflow is restricted or the primary limit fails to trip. Designed to fit York P2DPD12N06401A models and compatible with various Johnson Controls platforms, this OEM replacement part ensures your system maintains its original safety listings. For field technicians, the S1-025-27792-708 offers a direct drop-in solution with standard spade terminal connections, reducing diagnostic time and ensuring reliable flame rollout or temperature monitoring. Regular inspection of these HVAC safety controls is essential for maintaining proper furnace limit control and ensuring the 170-degree Fahrenheit threshold is never exceeded during operation. Replace faulty or tripped switches immediately to restore system integrity and safe heating cycles.

Key Benefits:

• Critical Thermal Protection: Set to trip specifically at 170F, preventing heat exchanger damage and hazardous operating conditions.
• Manual Reset Mechanism: Requires a technician to physically inspect the system before restarting, ensuring the root cause of the overheat is addressed.
• OEM Compatibility: Exact replacement for York S1-025-27792-708 and cross-referenced with part number 208W52 for a guaranteed fit.
• Durable Construction: Built to withstand high-cycling environments found in modern gas furnaces and air handlers.

Common Questions:

• What causes a 170F manual reset limit switch to trip? Typically, a trip is caused by restricted airflow, such as a clogged filter, blocked return, or a failing blower motor.
• Can I use an automatic reset switch in place of this manual reset model? No. Safety protocols require manual reset switches in high-limit or rollout applications to ensure the unit is inspected by a professional before operation resumes.
• Is this switch compatible with other furnace brands? While designed for York and Luxaire (Johnson Controls), compatibility is determined by temperature rating and mounting; always verify with the S1-025-27792-708 part number.

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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.