Enhanced Durability: Constructed to rigorous OEM technical specifications for long-cycle reliability in high-ambient temperature environments

For contractors asking how to replace York furnace limit switch components

How do I know if my ignition transformer is failing

the controller prevents the system from running the condenser fans unnecessarily during low-load periods

which prevents attrition and ensures consistent flow with minimal pressure drop

Carrier HH18HA497 Limit Switch 319852-301 Enhanced Durability: Constructed to rigorousThe Carrier HH18HA497 Limit Switch is a critical safety component designed for precise thermal monitoring in residential and commercial furnaces. As a genuine OEM replacement part, this 190 degree open limit switch is engineered to open the electrical circuit when the heat exchanger cabinet reaches its maximum safety threshold, preventing equipment damage and hazardous conditions. When the temperature drops to the 150 degree close setpoint, the switch