Carrier HH19ZA135 Limit Switch L135-40F

The Carrier HH19ZA135 L135-40F limit switch is the safety device that is fitted on HVAC equipment to stop the equipment from overheating. It has a mechanical characteristic that functions as an electrical switch when a certain condition is met. In HVAC systems, limit switch is mainly used to control fans, compressors and dampers and turn them on or off at predetermined temperature set points. L135-40F limit switch, has a set temperature of 135°F as a limit. If the temperature around the switch gets to this level, it turns off the heating system to avoid the risk of getting damaged by heat. The switch can be applied to allow heating elements whenever the temperature decrease below a given value.