Rated for 440 VAC

critical for protecting the boiler block from dry-fire conditions

operating reliably across a 110-270 VAC range

GNK100N16B3

Its non-positional mounting design and universal bracket ensure a seamless fit in any orientation

Carrier HH12ZB190 Limit Switch Rated for 440 VACThe Carrier HH12ZB190 Limit Switch is a critical OEM safety component engineered for HVAC high limit protection in gas furnaces and packaged units. As an automatic reset limit switch, this part is designed to open the electrical circuit when internal plenum temperatures reach 190F (cut out) and automatically close once the temperature drops to 150F (cut in). This Normally Closed (NC) switch features a 3 inch insertion length, ensuring accurate sensing