What is the method for recharging the vehicle's air conditioning with refrigerant?
3 Answers
Vehicle air conditioning refrigerant recharge method is: 1. Prepare complete and qualified refrigerant charging tools; 2. Connect the adapter between the car air conditioning and charging tools; 3. Vacuum extraction; 4. Inject liquid refrigerant from the high-pressure side, thus completing the air conditioning recharge. Car air conditioning is an air conditioning device installed in vehicles that can cool, heat, ventilate and purify the air inside the compartment, providing passengers with a comfortable environment and reducing driver fatigue. Precautions for car air conditioning include: 1. Do not immediately turn on the heating when warming up the car in the morning, wait until the engine coolant temperature rises; 2. Do not set the air conditioning temperature too high, as prolonged excessive heat may cause drowsiness and affect driving.
When recharging a vehicle's air conditioning system with refrigerant, I typically follow these steps: First, I check the AC system for any leaks or insufficient pressure. I always wear safety goggles and gloves for protection, as refrigerants involve high pressure and chemical hazards. Then, I connect the manifold gauge set to the car's AC low-pressure port—usually located near the compressor under the hood. I start the engine and set the AC to the coldest temperature with the fan at maximum speed. Observing the pressure readings; if it's below the standard range (typically 30-40 psi), it indicates a refrigerant shortage. Next, I turn off the engine, attach the refrigerant can to the gauge set, and slowly open the valve to inject the refrigerant. Throughout the process, I closely monitor the pressure and temperature gauges to prevent overcharging, which could damage the system. After completing the recharge, I perform another leak check to ensure all connections are properly sealed. A word of caution: This isn't a job for beginners—mistakes can harm both the vehicle and the person. I always recommend having it done at a professional shop. Regular AC maintenance can prevent frequent recharging; an annual check-up is usually sufficient for peace of mind.
As an ordinary car owner, I once tried to recharge the AC refrigerant myself. The basic steps are: Get an automotive refrigerant recharge kit, which costs just a few dozen yuan. Open the hood, locate the low-pressure valve port (usually on the right side), and clean off any dust. Wear protective gloves and connect the pressure gauge. Start the engine and turn the AC to MAX cold, then check the gauge pressure. If it's low, connect the refrigerant canister and slowly open the valve to add refrigerant. Meanwhile, monitor the vent temperature—if it drops to around 10°C, that's about right; don't overfill. The whole process takes roughly 20 minutes, but don't get careless—I once overfilled it and the AC stopped working completely, costing me hundreds in repairs. Later, I learned to check it every early summer to prevent refrigerant leaks. Poor AC cooling isn't always due to low refrigerant—it could be a dirty filter or fan issue, so try cleaning first before deciding to recharge.
