Carrier HH18HA508 Limit Switch 320788-704 including ducts and plenums

including ducts and plenums

Complete Service Kit: Includes the Honeywell ignition module

ensuring seamless integration into existing systems without extensive modifications

For technicians servicing steam or hydronic systems

Carrier HH18HA508 Limit Switch 320788-704 including ducts and plenumsThe Carrier HH18HA508 Limit Switch is a critical OEM replacement part designed for precision thermal monitoring in Carrier, Bryant, and Payne gas fired furnaces. As a primary safety component, this 120 160 degree limit switch features an automatic reset function, ensuring the burner circuit interrupts if internal plenum temperatures exceed the 160F threshold and restores operation once the system cools to 120F. Engineered for high cycle reliability in