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How to Check if the Car Air Conditioner Refrigerant is Low

1 Answers

OVincent

07/30/25 12:41am

To check if the car air conditioner refrigerant is low, follow these methods: 1. When the air conditioner is running normally and continuously, if there are continuous bubbles in the sight glass, it indicates insufficient refrigerant; 2. When the air conditioner is running normally and continuously, if there are no bubbles in the sight glass, but brief bubbles appear when the air conditioner stops, it indicates the refrigerant level is normal. The process of refilling the air conditioner refrigerant is as follows: 1. Evacuate the system, close the manual valves on the pressure gauge and the high and low pressure manual valves; 2. Connect one end of the hose to the injection valve fitting of the refrigerant can; 3. Open the refrigerant can, loosen the nut on the pressure gauge hose to let some gas escape, then close it; 4. Open the high-pressure side manual valve and invert the can; 5. Inject the specified amount of liquid refrigerant, then close the refrigerant injection valve and the high-pressure manual valve.

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