Why does a car overheat when using the AC while moving?

A car can overheat while using the AC while moving due to several factors, such as a malfunctioning cooling system, low coolant levels, or a failing thermostat. The AC system puts additional load on the engine, which can exacerbate existing cooling issues, especially if the radiator or cooling fan isn't functioning properly. If the cooling system is unable to dissipate heat effectively, the engine temperature can rise, leading to overheating. Regular maintenance of the cooling system is essential to prevent this problem.