Carrier HH18HA507 Limit Switch 321894-709 The standard threaded stem allows

The standard threaded stem allows for straightforward field installation and maintenance

When replacing the 9006990005 burner assembly

For technicians performing HVAC R-22 valve replacement

maintaining consistent airflow and discharge temperatures

This unit is shipped for natural gas

Carrier HH18HA507 Limit Switch 321894-709 The standard threaded stem allowsThe Carrier HH18HA507 Limit Switch is a critical safety component engineered for precise thermal monitoring in high output Carrier, Bryant, and Payne furnaces. This OEM furnace limit switch serves as a high limit safety cut out, designed to interrupt the electrical circuit if internal temperatures exceed safe operating parameters. Featuring an auto reset function, the switch automatically restores the circuit once temperatures drop below the 145F