York S1-025-38970-000 Limit Switch

Ensure precise thermal safety and reliable burner modulation with the York S1-025-38970-000 Limit Switch. This factory-authorized OEM limit control is vital for protecting the furnace heat exchanger from overheating conditions. Engineered for rapid response, this auto-reset limit switch features a critical temperature profile with a 130°F opening setpoint and a 100°F closing setpoint. Designed specifically for compatibility with York GY8S furnace models and related high-efficiency HVAC equipment, this component functions as a primary safety circuit breaker, instantly interrupting the gas valve circuit if airflow obstructions or blower failures cause internal temperatures to exceed safe operational parameters.

Professional-grade construction ensures this furnace limit switch replacement maintains calibrated accuracy throughout its service life across residential and light commercial applications. As a genuine Source 1 technical part, it provides exact fitment and terminal alignment, reducing downtime for contractors and ensuring the system returns to peak performance. This 100-130F automatic limit switch eliminates the need for manual resets, restoring system functionality once the plenum temperature returns to the safe 100°F threshold.

• Factory-Calibrated Precision: Features an optimized 130 degree opening temperature to prevent thermal damage to the heat exchanger during restricted airflow events.
• Automatic Reset Logic: Ensures consistent equipment operation by re-engaging the ignition sequence once internal temperatures drop to 100°F.
• OEM Compatibility: Designed for seamless integration with York GY8S100C16UH11B systems and other Source 1 compatible furnaces.
• Industrial-Grade Reliability: Built for heavy-duty HVAC duty cycles, providing dependable protection against "limit-trip" diagnostic codes.

• What causes this limit switch to trip repeatedly? Frequent tripping usually indicates a restricted return air duct, a dirty furnace filter, or an aging blower motor that is failing to move enough CFM across the heat exchanger.
• Is this part an exact replacement for the S1-025-38970-000? Yes, this is a genuine York OEM replacement designed to meet the original engineering specifications for safety and performance.
• Does this switch require manual intervention? No, this is an auto-reset control. If the system cools down and the switch closes, the furnace will attempt to restart without manual technician input.

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.