How To Put Freon In A Window Air Conditioner? 6 Easy Steps!

The question is: how to put Freon in a window air conditioner? Doing this by yourself requires some particular tools and knowledge about air conditioners to ensure that you will do it correctly.

If you are not sure about what you are going to do, it is better to hire an HVAC professional because this process is deemed dangerous.

how to put Freon in a window air conditioner

Otherwise, you can begin by diagnosing your unit. This is to ensure that the problem with your AC unit is indeed low in the refrigerant.

There are many more things that you should know about putting the Freon in your AC. Without further ado, let’s start!

 

 Signs That Your AC Needs Freon

It would help if you were certain about your unit’s issue before you call in a technician. The following signs will tell you that it might be low in the refrigerant.

 

Sign #1. The air conditioner does not cool the house

Freon is the one that is absorbing the warm air in your house. If the refrigerant level is low, the air conditioner cannot absorb the heat any more to cool your house.

So if you run your air conditioner the entire day yet notice that it is not getting cold, then it might be because the r-22 refrigerant level is low.

 

Sign #2. Higher electric bills

If you noticed that your electric bill has spike way higher than normal, it could also indicate that the unit requires more Freon.

 

Sign #3. The vents are blowing warm air

Again, if the refrigerant is insufficient, the air conditioner won’t absorb the warm air. As a result, the air that will come out of the vents may not be cold, or it can even be warm. Sometimes, lesser air will be blown out by the vents.

 

Sign #4. Ice build-up in the refrigerant line

Check your AC unit outdoor; if you see an ice build-up on its refrigerant line, then the Freon maybe not be enough. If the AC is low on refrigerant, it will cause its evaporator coils to be much colder.

If this issue will not be remedied, the refrigerant will find its way into your compressor unit.

In such a case, the compressor will be destroyed or damaged and this problem is even expensive to solve. Or worse, you will have to replace your air conditioning system.

 

Sign #5. Bubbling or hissing sound coming from the Freon line

Leaks at the Freon line usually cause refrigerant loss. In case of a leak, you will hear a weak sound of the refrigerant leaking from the line. This can sound like a hiss or even a bubbling noise.

 

Steps To Put Freon In A Window Air Conditioner

If you are certain that the problem with your unit is low in Freon, then follow the steps below. So, how to put Freon in a window air conditioner?

 

Step #1. Checking the temperature

You need to check first if the air being blown by the unit is sufficiently cold. If it seems like it is not as cool as before, use a thermometer to know its temperature while it is working.

Make sure to write down the temperature. You should also check the temperature that the unit absorbs. Just hold your thermometer in front of the unit. Also, write the temperature down.

 

Step #2. Calculating the difference of the two temperatures

The next thing that you have to do is to find the difference between those two numbers. In case the difference is greater than twenty degrees, then your unit requires cleaning. But if it is lower by 15 degrees, then it might need more Freon.

 

Step #3. Taking out the unit

You need to remove your unit from the window to repair it. First, use a screwdriver to remove the panel. Then, locate the line that is connected to the compressor unit.

 

Step #4. Attaching the tubes

You will see two lines. Choose the larger one since this is the line where you need refilling the Freon. Next, attach a valve to the line. Follow the directions indicated in the manual of the valve. First, check to ensure that the gauges are off. Then, attach both the tube and the compound gauge onto the valve you attached earlier.

 

Step #5. Connect the Freon bottle to the tube

Turn your air conditioner on and put it on its high setting for a while. Then, get a bottle of the Freon and connect it to the yellow tube.

Next, open the valve and allow the yellow tube to loosen up and tighten it again after a few seconds. This is done so that it will release some air into the tube.

 

Step #6. Closing the valves

To allow the Freon to flow, you need to open the valve at the gauge. When the unit reaches the charge of 70 psi, you should turn the gauges off and the Freon. Finally, remove those tubes and clove the valve.

 

It’s A Wrap!

How to put Freon in a window air conditioner? Unfortunately, most of the window AC has no installed port that will allow you to add Freon. But if you follow the steps above, you can solve the issue with your AC unit that is low in Freon.

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