or if the contacts have welded shut

66 standards

A steady-on LED typically signals an internal hardware or software fault

if a vent limiting device is installed

allowing for precise end-switch signaling or equipment interlocking without additional hardware

Carrier HH680368 Limit Switch 320734-701 or if the contacts haveWhen you're dealing with a furnace that keeps tripping or a blower motor that won't shut down, the Carrier HH680368 Limit Switch is a primary diagnostic point. This genuine OEM furnace limit switch is a critical safety component designed specifically for Carrier, Bryant, and Payne heating systems. As an L200F limit switch, it is calibrated to monitor internal plenum temperatures and will break the electrical circuit to the burner if levels exceed the