Learn How to Recharge Window AC Like the Pros?

Window AC units are great when they are working. However, when they do stop blowing out cool air, it can be for a number of reasons.  If we focus on finding the problem and come to the conclusion that it needs to be recharged, it is important to learn how to recharge window AC. Doing so is not as difficult as it may sound. Following our step by step instructions will help you in getting your quiet window air conditioner back up and running in no time.

​Getting Started

Getting Started

Before we begin to go over how to recharge window AC, it is important to note that in some locations, there are actually laws that forbid you from working on your air conditioner in this fashion. You should be familiar with your local laws and regulations and make sure that you are not breaking any of them by performing this task. Here at coldaction.com we recommend following laws.

Make sure that the air conditioner is completely off. After unplugging the air conditioner, you should not have to worry about anything else. When it comes to safety, working on the inside of an AC can be dangerous. So, we advise to unplug the AC unit and then wait an hour or two before tinkering on the inside.

After a few hours, you can begin to open the AC. Depending on the type of air conditioning unit you have and the size, this can be easy or hard to do. However, most AC units can be opened by unscrewing a few select screws. At this point, the owner's manual is your friend. Read over it and determine the best route to take to open your air conditioner.

Examine Your AC

Though not a required step, we recommend to go ahead and check over your entire system. Doing this can prevent further issues with your AC. While your AC is already open, simply checking for any type of leakage or damage inside the system can make a big difference. If you do notice something out of the ordinary, go ahead and fix it or clean it. Sometimes, it may look like it is out of your league. As such, calling a professional to deal with the issue at that point is also perfectly acceptable.


In order to recharge your AC, you need to find the compressor. Typically, you can do so with the tools provided in the kit that you bought to go with your AC. Also relying on your user manual at this point is recommended. Now it's time to start making some connections. Get the service file that you have and attach it to the compressor line. Next, connect the top valve to the other compressor line. All of this should be provided with your Freon kit. Now, attach the lines that you just connected to your freon.

Ensure that everything is properly connected and turn on your AC. At this point, you should turn your AC on to its highest setting and watch as cool air begins to flow once again. This is the process of charging your AC. Once your AC is charged fully as described in your user manual, turn off the air conditioner, unplug it, and place everything back to normal.