York S1-025-27747-003 Rollout Switch

The York S1-025-27747-003 is a precision-engineered flame rollout switch designed for critical safety monitoring within residential gas furnace burner compartments. Featuring a fixed 160 degrees F trip point, this manual reset sensor is a high-limit safety device that opens the SPST (Single Pole Single Throw) circuit if it detects excessive heat or flame spillage outside the heat exchanger. This OEM replacement part is vital for preventing hazardous conditions caused by flue blockages, restricted combustion air, or compromised heat exchanger integrity. As a veteran-grade HVAC safety limit, it integrates seamlessly into the 24V control string of York, Coleman, and Luxaire gas-fired equipment. Technicians should ensure the mounting surface is clean and the electrical spade connectors are secure to maintain circuit continuity during the standard ignition sequence. Because this is a manual reset device, it requires a physical inspection of the combustion assembly before the system can be returned to service, ensuring that the root cause of the thermal event is addressed.

• OEM Specification: Direct replacement for York S1-025-27747-003, maintaining the original engineering tolerances for safety circuits.
• Manual Reset Mechanism: Provides a fail-safe that prevents the furnace from automatically restarting after a flame rollout event occurs.
• Standard SPST Configuration: Normally closed Single Pole Single Throw switch designed for easy integration into standard furnace limit loops.
• High-Temperature Sensitivity: Calibrated to 160 degrees F to detect localized overheating before system damage or fire hazards occur.

How do I troubleshoot a tripped York rollout switch?
Check for continuity across the two terminals using a multimeter. If the circuit is open and the manual reset button does not restore continuity, the switch may be defective or the ambient temperature at the burner box is still too high. Always inspect the heat exchanger for cracks if this switch trips.

Is the S1-025-27747-003 compatible with other brands?
Yes, this part is the factory-authorized replacement for many brands under the Johnson Controls umbrella, including Coleman, Luxaire, and AirEase units that specify a 160-degree manual reset rollout limit.

Can I use a higher temperature switch if this one keeps tripping?
No. You must always replace a flame rollout switch with the exact temperature rating specified by the manufacturer. Increasing the limit threshold can lead to unsafe operation and equipment failure.

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.