York S1-025-29041-001 Limit Switch

The York S1-025-29041-001 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in high-efficiency furnace and air handling units. Specifically designed as an Auto Reset Limit Switch, it features a 3-inch probe insertion to accurately gauge plenum temperatures. This HVAC high limit control is calibrated to trigger at a high-end threshold of 220°F and reset at 190°F, preventing heat exchanger damage and ensuring safe operational cycles. For service technicians, this direct replacement part is built to original factory specifications, maintaining the safety integrity of the system and preventing common issues like short-cycling or thermal lockout. Compatibility spans multiple York furnace models, including the FC9C series, making it a standard inventory item for commercial and residential call-outs.

Key Benefits:

• Precision Temperature Control: Monitors air temperature with a 190-220°F range to prevent overheating.
• Automatic Reset Functionality: Restores system operation once temperatures return to safe parameters without manual intervention.
• OEM Fit and Finish: Features a standard 3-inch insertion depth for direct-fit replacement on York and Coleman equipment.
• Critical Safety Protection: Interrupts the gas valve circuit immediately upon sensing an over-temperature condition.

Common Questions:

What are the symptoms of a failing limit switch?
Technicians often diagnose a faulty limit switch when the furnace blower runs continuously or the burners shut off before the thermostat reaches its setpoint. If the 190-220°F range is breached due to a weak internal spring or fouled sensor, it will lead to frequent system lockouts.

What causes this switch to trip prematurely?
While the switch itself can wear out, frequent trips are usually indicative of restricted airflow. Check for clogged air filters, blocked return registers, or a failing blower motor before replacing the limit control to ensure the new part behaves according to its thermal profile.

Is this switch compatible with other HVAC brands?
The S1-025-29041-001 is a genuine York replacement part, also found in older Source 1 and Coleman inventory. Always verify the 3-inch insertion depth and temperature rating against the original data plate to ensure proper secondary limit protection.

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.