Are you having problems with your air conditioning unit and you want to know how to recharge the window AC?

We’ve got you covered.

Developing a leak in the closed-loop system is a sign that your air conditioner stopped emitting cool air. It allowed the refrigerant to escape. A refrigerant’s role is to cool down warm air, and your window air conditioner will not perform if you do not refill it.

What does this mean? It means that you need to recharge the unit with a fresh infusion of coolant if you want to fix the issue. It is pretty simple, you just need to refill a window air. Once you do that, your window air conditioner will work again: cooling the space or room as usual.

Make sure you refill your window air conditioner with the proper coolant. Before you get any, check the specifications of what coolant your window AC uses. The process is relatively easy. When recharging a window AC, research the bolts and nuts previously if you did not do it before. Every HVAC system requires regular maintenance. Make sure you check your window AC every two months.

This article will provide you with a guide to follow on how to recharge a window air unit conditioner properly. Let’s take a look at it.

Few steps to recharge window AC

The Basics

The-Basics How to recharge the window AC? Quick guide to follow

The design of a window AC unit is straightforward. It removes the room’s air heat and replaces it with cold air that is filtered. There is a blower inside the window AC that pulls the room’s warm air over the evaporator coils. The air’s heat goes inside the refrigerant window AC (inside the sealed coil) and changes the refrigerant from liquid to gas. It condenses back to liquid form when the refrigerant releases the heat outside.

When recharging a window AC, keep in mind that you need to attach the kit’s service valve to the compressor line. There will be still one free line in the compressor. You should take this free compressor line and attach it to the tap valve included in the Freon Kit.

Clean the Window air conditioner

Clean-the-Window-air-conditioner2 How to recharge the window AC? Quick guide to follow

Dirty fins or a dusty filter can be a big problem. The first thing you need to dodo is to remove the filter holder or trim panel pull it from the window. You will surely need help with heavier models. Then, drag the mounting frame and case. Finally, clean and brush the fins outside tenderly with a soft- brush soaked in a water mixture and several drops of dishwashing liquid.

Vacuum the remains and the dust from both the condensing coils and the evaporator. It would be best if you have a window AC no-rinse foaming coil to spray both coils. You can find it at every home improvement store. Oil the fan shaft and blades if you remove the ca or the rubber. Wash the air filter or replace it if needed. If the unit does not work after cleaning, contact a professional for additional help.

Personal Protective Equipment

Personal-Protective-Equipment How to recharge the window AC? Quick guide to follow

Before you proceed, make sure you wear eyeglasses for protection as well as gloves. If you use Freon as a refrigerant, be careful, it is pretty toxic. If it comes into contact with sensitive skin, it can cause frostbite, and it is also cryogenic.

Keep in mind all necessary precautions before you recharge a window air. If you have all the required equipment, it will make your process easier.

Unplug Window Air Conditioner Units

Unplug-Window-Air-Conditioner-Units How to recharge the window AC? Quick guide to follow

The unplugging process of the window AC unit is pretty easy. You simply need to unplug the unit from the wall to stop working, and that is all. To ensure inner workings or recharge a window air just take the unit apart and check everything necessary.

Open Window AC Units

Open-Window-AC-Units How to recharge the window AC? Quick guide to follow

Most old window AC demand to slide their front and new window air conditioners require more effort. It would be best if you use a screwdriver to put them apart. You will determine what method to use with the help of the manual.

Check for Leaks

Check-for-Leaks How to recharge the window AC? Quick guide to follow

Checking leaks can be crucial before you decide to recharge a window air conditioner. First of all, you need to prepare a mixture of water and soap. Oil all gears of refrigerant transmission such as hoses, pipe, and valves.

After that, when you turn on the system and your monitor bubbles formation, then there is definitely a sign of a leak. Also, putting pressure on the unit with nitrogen will monitor its pressure and measure the pressure after a couple of minutes. If the pressure decreases, it means there is a leak.

Fix Leaks

Fix-Leaks How to recharge the window AC? Quick guide to follow

If there is a slow leak, you do not need to fix it; just compensate for refrigerant leaking. However, there is a faster leak; you need to solder the area from where the refrigerant is leaking. Plus, dirty filters can also be why window air conditioners are leaking, so cleaning them will prevent it.

Integrity check

Integrity-check How to recharge the window AC? Quick guide to follow

All construction elements need to be undamaged. If you notice damage or any sign of leakage, try to fix it if you know how. If you do not know how to do it, you should contact a professional who knows how to fix windows AC.


Refill How to recharge the window AC? Quick guide to follow

After you are sure that everything is secured and fixed, plug the window AC and turn it on. If you want fast results, then adjust to the strongest setting. The refilling will occur spontaneously; you do not have to do anything. In general, your responsibility is just to unplug the AC and turn it off once you refill the necessary quantity of Freon kit in it.

Regular Seasonal Maintenance

Regular-Seasonal-Maintenance How to recharge the window AC? Quick guide to follow

The maintenance of your air conditioner at the beginning will get the AC refrigerant in shape. You should check and clean the filter regularly. Plus, check the water pan and clean it with a sponge or rag if needed. If you constantly keep the pan clean, it will create proper condensate drainage, and also, you will stop mold from growing. Many homeowners are afraid and quite sceptical of recharges.

Fluorescent Dye Method

flour How to recharge the window AC? Quick guide to follow

This method is perfect for new homeowners. With the fluorescent dye method, you need to fill the system with fluorescent dye in a small and turn the AC. After filling the system with this compound, it will circulate together with the refrigerant and accumulates at all the leak sides.

Recharge a Window Air Conditioner

rec How to recharge the window AC? Quick guide to follow

After you make sure that your window air conditioner is connected and there is no leakage, turn on the window AC unit and put on the highest power settings. The refrigerant flows from the tank into the unit; after the service and tap valves, connect the Freon tank to the air conditioner.

Now, you need to determine the Freon’s amount by consulting with the unit’s manual. When you see the limit that the Freon tank has reached, turn off the unit, and unplug the air conditioner. Then, remove the service and tap valves and turn on the window air conditioning.

Ending thoughts on how to recharge the window AC

To sum up, in this article, we provide you with help and tips on how to recharge window AC. It is crucial to know what is the exact amount of refrigerant you need to refill. Why? If a system is overfilled with Freon, there is a more substantial possibility of leakage, higher costs, and, most importantly, it is less efficient.

Many places do not allow an unlicensed person to fill the window air conditioner with refrigerant because it is illegal. However, if the law approves that you can legally recharge the AC, you can just consult someone if you need any help or DIY. We recommend you to ask for help from a properly authorized company or a person.

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