How Many Cans of Refrigerant Are Needed for Car Air Conditioning?

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Car air conditioning generally requires 4 cans of refrigerant, but the actual amount is controlled based on the pressure gauge readings during operation. Below are the methods and timing for adding refrigerant to the air conditioning system. Method for Adding Refrigerant to Car Air Conditioning: Prepare qualified refrigerant charging tools, connect the car air conditioning system to the adapter of the charging tool, evacuate the system, and inject liquid refrigerant from the high-pressure side to complete the process. During charging, continuously monitor the high and low pressures. Typically, the low pressure should be 150-250 Kpa, and the high pressure should be 1300-1500 Kpa. Refer to the manual for specific values. Timing for Adding Refrigerant to Car Air Conditioning: Generally, refrigerant should be added every 2-3 years. However, if the cooling effect decreases or bubbles continuously appear in the sight glass of the air conditioning lines, it is necessary to replenish the refrigerant.