This issue could be caused by dirty evaporator or condenser coils, which reduce the system’s efficiency and make it work harder to cool your home. Another possible cause is a faulty thermostat that is not accurately reading the room temperature. Ensure the thermostat is set correctly and consider replacing it if it’s old or malfunctioning. Incorrectly sized air conditioning systems can also run constantly; if the unit is too small, it might struggle to cool the space adequately. Additionally, check for leaky ducts or insufficient insulation, which can cause the system to run longer to maintain the desired temperature. If you’ve checked these factors and the problem persists, it’s advisable to consult a professional to inspect and correct the issue.