How to Recharge Car Refrigerant?
2 Answers
Methods for recharging car refrigerant: 1. Charge from the bypass hole of the compressor discharge valve, known as high-side charging, where refrigerant liquid is added. This method is safe and fast, suitable for the first charge of the refrigeration system, i.e., after leak detection and vacuuming. 2. Charge from the bypass hole of the compressor suction valve, known as low-side charging, where refrigerant gas is added. This method is slower and can be used for replenishing refrigerant in the system. Refrigerant is the working fluid used in refrigeration and air conditioning systems to transfer heat energy and produce cooling effects. In air conditioning systems, it is a substance that facilitates heat transfer through evaporation and condensation, commonly known as Freon.
Last time I added refrigerant to my old Jetta, it was a hands-on experience. Having a pressure gauge set ready is crucial. First, locate the low-pressure pipe marked with an 'L' in the engine bay, the one with a blue cap. Connect the gauge set to see the pressure reading; in summer, it should normally be between 25-35 PSI. Then, close the valve tightly, invert the refrigerant canister, attach it to the filling port, and open the valve to hear the hissing sound as it fills in. Always remember to wear gloves and goggles—refrigerant can cause frostbite if it contacts your skin. Keep an eye on the pressure gauge the whole time to ensure it doesn’t exceed 40 PSI. Once done, the AC should blow ice-cold. If it still doesn’t work, there might be a leak in the pipes, and you’ll need to visit a repair shop for a leak check.
