York S1-025-29041-007 Limit Switch

The York S1-025-29041-007 Limit Switch is a critical safety component designed for precise thermal monitoring in HVAC furnaces and air handling units. Operating with a calibrated 140-170F temperature range, this auto reset limit switch is engineered to open the electrical circuit at 170°F to prevent heat exchanger damage and automatically close once internal temperatures drop to 140°F. As a genuine OEM replacement part for York, Coleman, and Luxaire equipment, it ensures full compatibility with specific furnace series, including the FC9V100C20UP12B model. This "open on rise" limit control features a 3-inch insertion depth, making it an exact drop-in solution for contractors troubleshooting short-cycling or overheating issues. Utilizing Source1 genuine parts maintains the original integrity of the heating system, preventing the safety hazards associated with generic aftermarket alternatives. For veterans in the field, this switch offers the reliable continuity and fixed set points required to meet rigorous factory specifications.

• Precise Thermal Protection: Engineered with a strict 170 degree opening set point to protect the heat exchanger from critical overheating.
• Automatic Reset Logic: Features auto reset functionality that restores system operation at 140°F without requiring manual intervention.
• OEM Standards: As a genuine York service part (S1-025-29041-007), it guarantees correct mounting hole alignment and electrical terminal spacing.
• Contractor Grade Durability: Specifically built to withstand high-cycle thermal stress found in modern high-efficiency gas furnaces.

• How do I test if my York limit switch is faulty? Use a multimeter to check for continuity across the terminals at room temperature; the switch should be normally closed. If the circuit stays open when the unit is cool, the internal bimetal disc is likely warped.
• What causes a limit switch to trip frequently? Common causes include restricted airflow from a dirty filter, an undersized return duct, or a failing blower motor causing the temperature to rise above 170°F.
• Is this switch compatible with other brands? Yes, this part also serves as a direct replacement for Coleman and Luxaire furnace models that specify the 025-29041-007 part number.

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.