How to Check for Refrigerant Leak in Car Air Conditioning?

[LeMartin]

To check for refrigerant leak in car air conditioning, you need to go to a 4S shop. First, inject some fluorescent dye into the pipeline, then recharge the refrigerant. The steps for adding refrigerant to car air conditioning are: 1. Prepare intact and qualified refrigerant and filling tools; 2. Connect the car air conditioning system to the filling tool adapter; 3. Inject liquid refrigerant from the high-pressure side. Car air conditioning refrigerant should be replenished every 3 to 5 years. Methods to determine if refrigerant needs to be added include: 1. If bubbles continuously appear in the sight glass of the pipeline when the air conditioning is running, it indicates low refrigerant level; 2. If no bubbles appear whether the air conditioning is running or stopped, it indicates excessive refrigerant; 3. If no bubbles appear when the air conditioning is running but briefly appear when stopped, it indicates normal refrigerant level; 4. Open the hood and check for oil stains at the air conditioning system joints. Oil stains indicate refrigerant deficiency.