Carrier HH18HA141 Limit Switch 321042-401 Because this is a manual

Because this is a manual reset switch

While primarily a head pressure control

reducing installation time and eliminating the need for messy field-applied sealants

For veteran techs

Featuring a 2 1/2-inch NPT connection and a robust aluminum body

Carrier HH18HA141 Limit Switch 321042-401 Because this is a manualThe Carrier HH18HA141 Limit Switch is a critical OEM safety component engineered for precision thermal monitoring in Carrier, Bryant, and Payne gas furnaces. As a normally closed SPST disc style switch, it serves as the primary high limit defense against heat exchanger overheating. This L140 40F limit switch is designed to automatically open the electrical circuit when internal plenum temperatures reach 140F, effectively shutting down the gas valve to