Carrier HH12ZZ165 Limit Switch 318172-701 preventing potential safety issues or

preventing potential safety issues or premature component wear

Featuring a 3/4 inch NPT connection and a robust 5

as a 3PDT relay

allowing for rapid field replacement without breaking the hydronic seal or draining the system

utilizing this updated OEM heating part ensures seamless mechanical compatibility and restores the system to its original performance standards without the risks associated with generic alternatives

Carrier HH12ZZ165 Limit Switch 318172-701 preventing potential safety issues orThe Carrier HH12ZZ165 Limit Switch is a critical OEM safety component engineered for precision thermal monitoring in HVAC furnaces and industrial heating systems. As a fixed temperature L165F 40 limit control, this switch features a normally closed (NC) circuit designed to open on a temperature rise at its 165F set point, effectively preventing heat exchanger damage. With a 40F differential, the automatic reset engages when the internal temperature