Why does the car air conditioner not cool during the day but cools at night?

[BeckettLynn]

The reason why the car air conditioner does not cool during the day but cools at night is poor condenser heat dissipation. The reasons for poor condenser heat dissipation are: 1. The condenser surface is too dirty; 2. There is air in the system; 3. The surrounding air is not circulating; 4. The ambient temperature is too high; 5. An oil film forms inside the condenser. The functions of the air conditioner: 1. Achieve cooling effect by continuously transforming and circulating the refrigerant; 2. Use the engine coolant, waste heat, or heat generated by a burner as a heat source for heating, which is then heated by the heater and blown into the car by the blower to increase the temperature and achieve a heating effect; 3. Draw in fresh external air for ventilation and air exchange to prevent windshield fogging.