Carrier HH12ZB140 Limit Switch 321894-708 How do I adjust the

How do I adjust the pressure set point

this switch is "normally closed" and should show near-zero resistance

Built to maintain tight temperature tolerances

For contractors performing Bard HVAC repair

and smart thermostats without voltage sag

Carrier HH12ZB140 Limit Switch 321894-708 How do I adjust theMaintain peak safety and performance in your rooftop or residential furnace systems with the Carrier HH12ZB140 Limit Switch. This genuine OEM HVAC replacement part is a factory authorized L140F 40 limit switch, specifically engineered for high limit protection in Carrier, Bryant, and Payne air handlers and package units. As an auto reset limit switch with a SPST (Single Pole Single Throw) configuration, it is designed to interrupt the heating circuit