Carrier HH19ZA180 Limit Switch 180°F Open 140°F Close

The Carrier HH19ZA180 Limit Switch is a safety system that controls the temperature and limits the temperature in different kinds of HVAC equipment such as furnaces. It is a small device, with the size of a small rectangle 0.9 x 2.3 x 1.1 Inches. It disturbs an electrical circuit when a certain temperature is reached. The switch opens at 180°F which breaks the circuit and closes at 140°F which makes the circuit. This reduces the likelihood of the furnace catching fire or suffering component failure and causing related destruction. The limit switch is such a vital part of your HVAC system because it shuts down the heating element as soon as the set temperature has been reached.