York S1-025-29041-004 Limit Switch

Maintain the integrity of critical safety circuits with the York S1-025-29041-004 Limit Switch, a precision-engineered OEM furnace replacement part designed for high-cycle reliability. This auto reset limit switch features a 3-inch sensor arm calibrated to industry standards, effectively monitoring heat exchanger temperatures. When the plenum temperature reaches the 160°F limit, the internal bimetal disc triggers a circuit interruption to prevent equipment damage. As the system cools to 130°F, the switch automatically resets to restore operation. Built for specific York, Coleman, and Luxaire gas furnaces and air handlers, this component eliminates the risks associated with universal "one-size-fits-all" switches. Proper installation of this high-limit safety control is essential for preventing premature blower cycling and ensuring the furnace operates within its designated thermal parameters.

Key Benefits for Contractors

• Pre-calibrated Accuracy: Opens at 160°F and closes at 130°F, ensuring precise thermal protection without the need for field adjustments.
• Direct OEM Fit: Drop-in replacement for S1-025-29041-004, facilitating faster service calls and maintaining the equipment’s original UL listing.
• Industrial Build Quality: Constructed with materials designed to withstand the rapid thermal expansion and contraction cycles of residential and light commercial heat exchangers.
• Enhanced Safety: Acts as a primary fail-safe against restricted airflow conditions, such as clogged filters or failing blower motors.

Common Questions

Is this a manual or automatic reset switch?
This is an automatic reset limit switch. It will reset itself once the temperature drops below the 130°F threshold. If the switch continues to trip, technicians should inspect for airflow obstructions or gas pressure issues.

Can I use this switch in a mobile home furnace?
Yes, provided the original specifications match. This part is frequently used in Coleman and York mobile home furnace units that require a 3-inch insertion depth.

What causes this limit switch to fail?
Mechanical failure often results from excessive cycling due to poor airflow, soot buildup on the sensor arm, or worn bimetal contacts after years of service.

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.