If your car's air conditioning system starts getting hot while parked and then blows cold air once you start driving, and you notice the engine temperature rising, there could be a couple of potential issues at play:
Cooling System Problems: The engine cooling system may have a problem, such as a malfunctioning radiator fan or a failing water pump. When the car is parked, there is no airflow to cool down the engine, and the temperature may rise. Once you start driving, the increased airflow through the radiator helps dissipate the heat, and the engine temperature comes down, allowing the air conditioner to function properly again.
Low Refrigerant Levels: The air conditioning system relies on a refrigerant to cool the air. If the refrigerant levels are low, it can cause the AC to blow warm air while parked. When you start driving, the compressor works harder, and the increased pressure can push the refrigerant through the system, leading to colder air.
AC Compressor Issues: The AC compressor may not be functioning optimally. When the car is stationary, the compressor might not engage correctly, resulting in warm air blowing from the vents. Once you start driving, the compressor starts working more effectively, leading to colder air.
Engine Overheating: The rising engine temperature could be related to issues with the cooling system, such as low coolant levels, a faulty thermostat, or a coolant leak. An overheating engine can affect the overall performance of the car, including the AC system.
It's essential to have your car inspected by a qualified mechanic to diagnose and resolve the specific issues causing these symptoms. Driving with an overheating engine can cause severe damage to your vehicle, so it's crucial to address the problem promptly. Avoid using the AC until the issue is fixed to prevent further strain on the engine.