Carrier HH12ZB200 A/R High Limit Switch 160°-200°F

The Carrier HH12ZB200 A/R High Limit Switch is a temperature-sensitive secure control applied in heating components of HVAC systems to prevent overheating. It closes the electrical contacts upon sensing air or heat exchanger temperatures that are in the high limit range of 160°F to 200°F and interrupts the heat source and automatically re-closes as the temperature returns into the safe range. This switch is installed in the combustion chamber, plenum or heat exchanger side of the furnaces or heating units and is wired into the control circuit to avoid excessive temperatures and aid in the secure operation of the components.