Be careful not to overfill your system – you should only add as much Freon as necessary to discharge the old Freon from your system. Once your car’s engine is running, it’s time to open the refrigerant can. This will help move the Freon through your system and make it easier to discharge. The next step is to turn on your car’s engine. Make sure that the can is properly connected and that there are no leaks. Once you’ve located the low-pressure port, it’s time to connect your refrigerant can to the port. Step 2: Connect the Refrigerant Can To the Low-Pressure Port If you’re having trouble finding it, consult your car’s owner’s manual for more information. The low-pressure port is usually located on the AC lines near the compressor. The first step in discharging your car’s AC is to locate the low-pressure port. How to Discharge Car AC at Home Step 1: Locate Your Car’s Low-Pressure Port This can help improve the efficiency of your car’s AC and make it feel cooler in the summer months. Again, it’s important to completely discharge the old Freon before adding any new Freon to your system.įinally, if your car’s AC isn’t cooling as well as it used to, it might be necessary to partially discharge and then recharge your system with fresh Freon. In this case, it’s necessary to completely discharge the old Freon from your system before adding fresh Freon.Īnother reason you might need to discharge your car’s AC is if you’re planning on performing some major repairs on your systems, such as replacing the evaporator or condenser. One common reason is that your car’s AC compressor may have failed and needs to be replaced. There are a few reasons why you might need to discharge your car’s AC system. Once you’ve discharged most of the Freon, you can then begin recharging your system with fresh Freon. However, you should always start by discharging about 80% of the Freon from your system. The amount of Freon you’ll need to discharge from your car’s AC system will vary depending on the size and make of your vehicle. Close the valve on the vacuum hose and remove it from the low-pressure service port.Turn on the vacuum pump and wait until the pressure gauge on your AC kit reaches 0 PSI.Make sure that it’s tight so that there’s no air leakage. Connect one end of the vacuum hose to the low-pressure service port.It will have a black cap with an “L” or “LP” label on it. Locate your car AC’s low-pressure service port, which is usually near the compressor.The following are steps for removing refrigerant using a vacuum: One way is to use a vacuum pump, which will suck the refrigerant out of your system. There are a few ways that you can remove refrigerant from your car AC. Any price and availability information displayed on at the time of purchase will apply to the purchase of this product. Product prices and availability are accurate as of the date/time indicated and are subject to change. Prices pulled from the Amazon Product Advertising API on:
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