York S1-025-27733-002 Rollout Switch

The York S1-025-27733-002 Rollout Switch is a critical safety component designed for precise thermal monitoring in residential and commercial furnaces. This Double Pole Single Throw (DPST) switch provides redundant circuit protection, essential for identifying combustion issues or venting failures. Engineered with a 175°F open temperature and a 95°F close temperature, it ensures the system shuts down immediately if flame rollout is detected, preventing damage to the furnace cabinet and surrounding components. As a direct OEM replacement part, this switch maintains the original equipment’s safety standards and electrical specifications. The manual reset design requires a technician to inspect the heat exchanger and burner assembly for blockages or cracks before restoring operation. Compatible with various Johnson Controls and York gas furnaces, this limit switch is built for high-duty cycle reliability and long-term thermal stability in high-temperature environments near the burner manifold.

Key Performance Benefits

• DPST Configuration: Provides secondary circuit interruption for enhanced safety protocols in gas-fired heating systems.
• Precision Thermal Calibration: Factory-set to trigger at 175 degrees Fahrenheit to prevent localized overheating.
• OEM Compatibility: Exact fit for York S1-025-27733-002, ensuring seamless integration with existing wiring harnesses.
• Durable Construction: High-grade ceramic and metallic components resist thermal fatigue in the burner compartment.
• System Diagnostics: Operates as a critical signal for furnace troubleshooting regarding airflow and combustion backpressure.

Common Questions

What causes a rollout switch to trip on a York furnace?
A trip typically indicates a blocked heat exchanger, flue gas restriction, or insufficient primary air, causing flames to "roll out" toward the burners instead of entering the heat exchanger cells.

Can I bypass the S1-025-27733-002 for testing?
Bypassing a safety limit switch is never recommended outside of momentary diagnostic testing by a qualified technician. Operating a system without a functional switch poses a significant fire hazard.

Is this switch a manual or automatic reset?
This specific York rollout switch is a manual reset model, requiring a physical press of the button once the temperature drops below 95 degrees F, ensuring the underlying fault is addressed.

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.