First and foremost, to understand how a car air conditioner works, you need to understand the various components of the air conditioner. The compressor is the large center where the high and low-pressure hoses exit. This hose leads to the condenser and evaporator. Desiccant and expansion valves are also part of the system. The expansion valve is used to regulate the air temperature and control the flow of refrigerant through the system. 

Cooling Process:

The process starts at the compressor where the refrigerant is compressed into a high-temperature gas. This high-temperature gas then reaches the condenser via a high-pressure line. Inside the aircon condenser, the air and clean gas touch, and the air absorb all the heat from the high-temperature gas. As a result, the refrigerant takes on a liquid form. 

Car Air Conditioner Troubleshooting Guide - Nice Car Blog

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After thawing, it flows into the drying chamber. The dryer removes all impurities from the liquefied gas and presses the clean gas through the expansion valve to the evaporator. The heat in the air is absorbed by the liquefied gas and evaporated. A fan or blower blows air through the evaporator and finally into the interior of the car. This process is repeated.

Repair The Air Conditioner:

Repairing leaks is a relatively difficult task. It is important to check for leaks regularly. The refrigerant leak will certainly reduce the operation of the air conditioning system. Leaks in the system mean there's nothing left to dissipate heat.

To check whether the compressor is working properly or not, start the engine and make sure the AC switch is on. Open the lid and note the construction of the center, which resembles a pump and is surrounded by a hose. Check the compressor carefully. If you can't find movement in it, there must be a problem with the compressor switch.