How to Check the Amount of Refrigerant in a Car's Air Conditioning System?
1 Answers
From the sight glass, the refrigerant should appear transparent, not cloudy, without bubbles, and flowing steadily. When increasing or decreasing the engine speed, a small number of bubbles may appear. When the refrigerant level is appropriate, the refrigerant remains transparent regardless of the engine speed, there are no oil stains at the pipe connections, the high-pressure side should feel hot to the touch with a temperature between 50°C and 70°C, and there is a noticeable temperature difference between the high and low-pressure sides, indicating the refrigerant level is adequate. The methods to determine insufficient refrigerant in the car's air conditioning system are as follows: 1. Insufficient refrigerant can be observed through the sight glass on the top of the dryer tank. When the air conditioning is operating normally, if continuous slow bubbles are observed through the sight glass, it indicates insufficient refrigerant. If obvious bubble flipping is observed, it indicates a severe shortage of refrigerant. Check the high and low-pressure side pressures during normal operation; both should be low. At this time, the cooling effect is poor. 2. After the air conditioning has been running normally for a while, the air blowing on you should feel very cool and quickly reach the set temperature. If the compressor starts and stops frequently and the cooling effect is poor, it may need refrigerant.
