Package Includes: This package contains 2 limit switches (Compatible with HH18HA452), new and designed as reliable replacements for your furnace when the original fail Compatibility: The furnace limit switch is compatible with Carrier, and Payne furnaces, ensuring seamless integration and functionality. This switch is a for many HVAC system Efficient Temperature Control: Designed for furnace fan systems, this furnace limit switch opens on temperature rise 250 degrees fahrenheit to disconnect contacts, preventing overheating and maintaining normal furnace operation. The manual reset design enhances both safety and equipment maintainability Built to Last: Built with premium metal, the flame rollout switch is to high temperatures and , ensuring a long service life. Additionally, the switch has excellent sensitivity and accuracy precise temperature detection and timely adjustments Easy to Install: Simply use basic tools (like a screwdriver) to remove the old switch, then install the new limit switch with the front side facing up and connect the leads correctly. This straightforward process saves both time and money Color: As Shown Material: Metal Package Contents: 2* Limit Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.