How Much Refrigerant Should Be Added to a Car Air Conditioner?

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Generally, a car air conditioner 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 conditioner: Method for Adding Refrigerant to a Car Air Conditioner: Prepare qualified refrigerant charging tools, connect the car air conditioner to the charging tool adapter, evacuate the system, and inject liquid refrigerant from the high-pressure side to complete the refrigerant charging. During the process, constantly monitor the high and low pressures. Typically, the low pressure should be 150-250 Kpa, and the high pressure should be 1300-1500 Kpa. Specific values can be referenced in the user manual. Timing for Adding Refrigerant to a Car Air Conditioner: Normally, refrigerant should be added every 2-3 years. However, if the owner notices a decline in cooling performance or continuous bubbles in the sight glass of the air conditioner's tubing, refrigerant should be replenished.