offering a secure mechanical lock without requiring specialized tools

this component allows for secure torque and leak-free installation on the burner manifold

For technicians servicing DGAM

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

replacing the Weil McLain burner gasket is a standard best practice to avoid callbacks

Carrier HH18HA499 Limit Switch offering a secure mechanical lockThe 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