The York S1-024-40872-000 Pressure Switch is a critical safety component designed for precise HVAC pressure monitoring in residential and light commercial furnaces

Common Questions What causes this limit switch to trip repeatedly

visible corrosion on the DIN plug terminals

Can I use this limit switch in other brands of HVAC equipment

Ensure there is at least 1/4" clearance between the paddle tip and the pipe wall to prevent mechanical interference

Rheem-Ruud 70-21858-09 Fan Blade The York S1-024-40872-000 Pressure SwitchThe Rheem Ruud 70 21858 09 Fan Blade is a critical condenser fan replacement for specific outdoor HVAC units. Engineered as a 2 blade assembly, this component features a 20 inch diameter and a precise 21 degree pitch to optimize airflow across the coils, ensuring efficient heat dissipation. Built with a 1 2 inch bore designed for intake side mounting, it facilitates a CCW (Counter Clockwise) rotation (facing the air discharge) to maintain proper