York S1-025-35358-000 Limit Switch

The York S1-025-35358-000 Limit Switch is a safety-critical manual reset furnace limit switch designed for York, Coleman, and Luxaire HVAC systems. Engineered to monitor internal heat exchanger and burner temperatures, this 150F M/R Limit Switch acts as a primary fail-safe by opening the electrical circuit when ambient heat reaches the 150°F threshold. Unlike auto-reset controls, this manual reset switch requires a technician to physically inspect the unit and reset the toggle before operation can resume, ensuring that the root cause of overheating—such as a failed blower motor or a severely clogged furnace filter—is addressed. This OEM York heating part is essential for preventing hazardous operation and potential component damage caused by excessive thermal loads. Its compact snap-disc design allows for rapid response times and direct integration with Source 1 control circuits, maintaining the precise overheat protection standards required by original equipment specifications.

• Precise 150°F Trip Point: Calibrated for high-accuracy thermal sensing to protect the heat exchanger from structural damage.
• Manual Reset Safety: Prevents dangerous short-cycling by requiring a manual override after a high-limit event.
• OEM Compatibility: Authentic York S1-025-35358-000 replacement ensures correct mounting and terminal alignment for Source 1 equipment.
• Reliable Overheat Protection: Critical for systems experiencing furnace 4 red flashes or 11-flash error codes related to limit circuit issues.

What causes a 150F manual reset limit switch to trip?
Usually, a trip is caused by restricted airflow, such as a dirty filter, failed inducer, or a malfunctioning blower motor. It can also indicate a cracked heat exchanger or gas pressure issues.

Is the S1-025-35358-000 compatible with other brands?
Yes, this part is the standard OEM replacement for Coleman and Luxaire units that specify a 150°F manual reset limit.

How do I test a York limit switch?
Check for continuity across the terminals. If the circuit is open at room temperature and the manual button is pressed, the switch is likely defective and requires replacement.

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.