A switch that manages the power supply to the air conditioner is known as an AC Contactor. It is normally found in the air conditioner's control panel and is controlled by the thermostat. When the thermostat calls for cooling, it sends a low voltage electrical signal to the contactor, which closes the circuit and allows power to flow to the air conditioner. For an efficient and re... https://www.partshnc.com/air-conditioner-parts/contactor