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Explaining the principle of operation of the air conditioning system in the car and a simple explanation of how to use a pressure tester to measure the gas pressure in the air conditioning system in the car, and the problem of disconnecting the compressor in high temperatures and the best solution to this problem. In the upcoming videos, I will show you how to charge the car's refrigerant gas, and you will be able to charge your car's refrigerant gas yourself and for free.