How to Add Refrigerant?
2 Answers
Refrigerant addition steps: Start the vehicle, turn on the air conditioning for cooling, keep the refrigerant bottle mouth upward, open the low-pressure side valve for filling, and pay attention to the filling amount. Refrigerant, commonly known as 'snow seed,' is a working fluid used in refrigeration and air conditioning systems to transfer heat energy and produce cooling effects. Based on working methods, refrigerants can be classified into primary refrigerants and secondary refrigerants; based on material properties, they can be divided into natural refrigerants and synthetic refrigerants. Refrigerant is an intermediate substance in the refrigeration process, which first cools down by receiving the cooling capacity of the refrigerant and then cools other substances to be cooled. There are gaseous refrigerants, liquid and solid refrigerants, gaseous refrigerants, etc.
As a DIY car repair enthusiast, I find adding refrigerant quite straightforward. You'll need basic tools: a manifold gauge set, refrigerant can, protective gloves, and goggles. Start by inspecting the system: Is there any leak in the AC? If not, locate the low-pressure port to connect the manifold gauge; evacuate for one minute to remove moisture and air, preventing compressor damage. Open the refrigerant can valve and add slowly while monitoring the pressure gauge—25 to 45 PSI is the ideal range, don't exceed it. Wear gloves throughout to prevent frostbite, as the gas is cold enough to harm your skin. If the AC cooling is poor, test the effect after refilling; I've encountered fan issues, so always check related components. DIY saves money, but be mindful of environmental regulations—R134a is commonly used, avoid leaks to prevent pollution. A few practice runs will make you proficient.
