York S1-025-41321-000 Auto Limit Switch 110°F-150°F

The York S1-025-41321-000 Auto Limit Switch (110°F–150°F) is a safety control device designed to regulate temperature in HVAC heating systems. It operates by automatically opening or closing the electrical circuit when preset temperature limits are reached, protecting the system from overheating. This auto limit switch is commonly used in York gas furnaces and compatible heating equipment. It helps prevent heat damage, maintains safe operating conditions, improves system reliability, extends equipment lifespan, and ensures consistent performance in residential and light commercial HVAC applications.