York S1-025-33325-000 Limit Switch

The York S1-025-33325-000 Limit Switch is a critical safety component designed for precise thermal monitoring in residential and light commercial HVAC units. This OEM replacement furnace limit switch features a 3-inch insertion length, allowing the bimetal sensing element to extend directly into the airstream for rapid response times. Engineered as an auto-reset limit switch, it is calibrated to open the circuit at 195°F if an over-temperature condition occurs, protecting the heat exchanger from damage. Once the system cools to 165°F, the switch automatically closes to restore regular furnace operation. For contractors performing HVAC furnace repair, this genuine York heating part ensures a drop-in fit for compatible 2HH, 2HB, and 2HC series units. Utilizing a snap-action disc for clean contact separation, the S1-025-33325-000 provides the reliability required to maintain system safety and prevent nuisance tripping in high-demand environments.

• Precise Thermal Calibration: Fixed 195°F open and 165°F close setpoints ensure the furnace operates within safe OEM parameters.
• Optimized Airflow Sensing: The 3-inch insert design provides accurate temperature readings deep within the plenum or heat exchanger area.
• Automatic Reset Logic: Eliminates the need for manual intervention by resetting the circuit once temperatures return to the 165°F safety threshold.
• Snap-Action Bimetal Disc: Engineered for fast contact separation, reducing electrical arcing and extending the component service life.
• Genuine OEM Compatibility: Verified for direct installation in a wide range of York, Luxaire, and Coleman equipment.

What causes this limit switch to trip repeatedly?
A trip at 195°F usually indicates restricted airflow, often caused by a dirty air filter, blocked return vents, or a failing blower motor. If the switch opens, it is performing its primary safety function to prevent heat exchanger cracks.

Is this a universal limit switch?
No. While it may fit physically, the 195°F opening temperature and 3-inch insertion depth are specific to certain York technical specifications. Always verify the part number on your existing switch before installation.

Can I use a manual reset switch in place of this auto-reset model?
It is not recommended. This system is designed for an automatic reset at 165°F. Replacing an auto-reset switch with a manual one can lead to unnecessary system lockouts and technician call-outs for simple cycling issues.

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.