Whether you are performing a cord replacement or a complete pump rebuild

and mixed gas systems

For technicians servicing DGAM

offering a secure mechanical lock without requiring specialized tools

Using a switch with an incorrect temperature range can lead to safety hazards or frequent nuisance tripping

Carrier HH18HA499 Limit Switch Whether you are performing aThe Carrier HH18HA499 Limit Switch is a critical high temperature safety component engineered for Carrier, Bryant, and Payne gas furnaces. This automatic reset limit switch is designed to open the electrical circuit when internal plenum temperatures reach the 165F threshold and closes once temperatures normalize to 125F. It serves as a direct replacement for the HH18HA499A model, ensuring field compatibility and maintaining the original safety circuit