making it a staple for stock on any service truck

while the precision-ground tip ensures a snug fit on the #4-40 hex screws commonly found in HVACR pneumatic systems

These are the most common sizes found on residential and light commercial equipment for accessing service ports and adjusting refrigerant flow valves

The 661024R is the current manufacturer-sanctioned replacement and supersedes the older 661024 part number while maintaining the same technical specifications

A tripped switch often indicates restricted airflow

York S1-025-29041-002 Limit Switch making it a staple forThe York S1 025 29041 002 is a professional grade OEM furnace limit switch engineered for precision thermal regulation in York, Luxaire, and Coleman heating systems. This automatic reset limit control features a 3 inch insertion probe, making it an essential safety component for monitoring high limit temperatures within the furnace plenum. Designed for high cycle reliability, the switch is calibrated to open at 150F to prevent heat exchanger damage