Air conditioning is the removal of heat from indoor air for thermal comfort. An air conditioner not only cools down a vehicle, but also reduces the moisture content, or humidity.
When you set your climate control to get a cool breeze flowing through the vehicle’s air conditioning (A/C) it will use a compressor that pumps refrigerant through the system and an expansion valve that restricts refrigerant inflow, lowering both the pressure and temperature of the refrigerant.
While heating the inside of a vehicle, the compressor will compress the gas then as this gas is pumped into the heat exchanger matrix and is allowed to expand it will take heat from the air running through the matrix.
The gas will often escape, albeit gradually over time, so you should have your air conditioning system checked and re-gassed at regular intervals if the air conditioning system isn’t working properly.
Firstly, check the system for leaks. The system has components that require internal lubrication. Use the air conditioning system regularly to avoid tubes drying out and cracking , which can cause leaks. Running the air conditioner regularly, even in winter, helps lubricate the components.
However, some newer models eliminate the need to run the air conditioner regularly. But it is advisable to consult the vehicle owner’s manual or visit your nearest AutoZone store for advice.