Why does ac compressor start and stop and not keep running?

An AC compressor starts and stops to maintain the desired temperature set on the thermostat and to prevent the system from freezing. This cycling is controlled by a pressure switch that monitors the refrigerant's pressure levels; when the pressure drops too low, the compressor shuts off to protect itself. Additionally, frequent cycling can occur due to issues such as low refrigerant levels, a malfunctioning thermostat, or dirty coils. These factors can lead to inefficient operation and potential damage if not addressed.