York S1-025-29041-012 Limit Switch

The York S1-025-29041-012 Limit Switch is a critical high-limit safety component engineered for precise thermal monitoring in residential York, Coleman, and Luxaire HVAC systems. This 160-190F auto limit switch features a 3-inch insert probe, allowing for accurate air temperature sensing within the furnace heat exchanger plenum. As a verified OEM replacement part, it is the direct substitute for legacy part numbers S1-2702-3181/A and S1-2702-318P/A. This York furnace safety switch operates as a normally closed control that opens the circuit if the internal temperature reaches the 190°F threshold, preventing hardware damage from overheating. The automatic reset function restores the circuit once the temperature falls to 160°F. For technicians troubleshooting furnace short cycling or blower motor run-over, installing this calibrated limit control ensures the system maintains optimal combustion airflow and safety compliance without the need for manual intervention.

Key Benefits

• Direct OEM Compatibility: Ensures a seamless fit for York furnace models requiring 2702 series switches.
• Automatic Reset: Automatically restores operation once temperatures reach the 160°F cut-in point.
• Extended Probe Depth: The 3-inch insertion depth provides accurate readings in high-velocity airflow environments.
• Safety Redundancy: Prevents heat exchanger fatigue by cutting power during restricted airflow or over-fire conditions.

Frequently Asked Questions

What are the signs that a York limit switch needs replacement?
Common indicators include the furnace blower running continuously, the burners shutting off prematurely (short cycling), or the system logging a "limit switch open" diagnostic flash code. If the switch lacks continuity when cooled, it requires a replacement.

Is the S1-025-29041-012 compatible with older S1-2702-3181/A units?
Yes, this part is the factory-designated replacement for S1-2702-3181/A and S1-2702-318P/A, maintaining the exact thermal specifications and mounting configuration for those legacy components.

How do I verify the temperature rating on my existing switch?
The temperature range is typically stamped on the mounting flange or the body of the switch. This specific model is calibrated for a 190°F cutout and a 160°F cut-in (160-190F).

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.