Carrier HH18HA141 Limit Switch 321042-401 While primarily a head pressure

While primarily a head pressure control

Within commercial HVACR systems

What is the purpose of the unidirectional range on this model

ensuring a gastight seal within the burner assembly

It is specifically balanced for CCW rotation (counter-clockwise)

Carrier HH18HA141 Limit Switch 321042-401 While primarily a head pressureThe 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