What are the symptoms of low refrigerant in a car's air conditioning system?

[VonAndres]

The symptom of low refrigerant in a car's air conditioning system is that the AC fails to cool properly. The term 'fluorine' mentioned here is inaccurate - it should be referred to as refrigerant. Definition of refrigerant: Refrigerant, also known as coolant or freon, is the medium substance used in various heat engines to facilitate energy conversion. These substances typically utilize reversible phase changes (such as gas-liquid phase transitions) to increase power output. Examples include steam in steam engines and refrigerant in refrigeration systems. Requirements for refrigerant: It must possess excellent thermodynamic properties to achieve high cycle efficiency within specified temperature ranges. Specific requirements include: critical temperature higher than condensation temperature, moderate saturation pressure corresponding to condensation temperature, low standard boiling point, small fluid specific heat capacity, low adiabatic index, and large refrigerating capacity per unit volume.