How To Drain A Portable Air Conditioner: Simple Steps To Follow

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How To Drain A Portable Air Conditioner

When you own a portable air conditioner, it can feel like a blessing on hot summer days. However, this device has its downsides too: It needs to be drained and vented once in a while. If you don’t know how to drain a portable air conditioner and vent it properly, there might be some problems with your unit. In addition to the technical issues that could arise from improper draining and ventilation of your portable AC, there are potential safety concerns as well. If you don’t know how to drain a portable air conditioner correctly, here is what you need to know.

How To Drain A Portable Air Conditioner

  1. Shut off the power to the air conditioner.
  2. Remove the drain valve on top of the unit. This is located on the side of your AC and looks like a small bucket with a handle. If you have any questions about this, look for a diagram or video online to help you figure out how it works.
  3. Turn off the water supply to your AC and drain any remaining water from it by opening the drain valve slowly until all water drains out completely.
  4. Remove your portable air conditioner from its location and turn it upside down, so that you can remove all excess water from inside of it using a hose or a bucket that is large enough to catch all of the water inside as well as outside of your unit. Make sure that you are placing enough pressure on your portable AC while doing this so that all excess water can be removed in one go without spilling any of it anywhere else around your home or even worse, dripping into an electrical outlet or something else dangerous like that!
  5. Once all excess water has been drained out, close up any openings in your AC unit (like vents) with some duct tape and seal up any other openings with some caulk if necessary as well just to make sure everything stays safe inside there until the next time when you need to drain it again! Make sure that no leaks occur while sealing up these openings either!

The Importance Of Draining And Venting

Draining Your Air Conditioner

Draining a portable air conditioner is the process of draining out the water from inside the air conditioner. This water is usually collected in a reservoir. The water is used to cool the evaporator coil, and then it is sent back to the unit as condensate. If there are any leaks in your unit, this can cause corrosion and other problems, which will require you to replace your unit.

Venting Your Air Conditioner

Venting is pretty much self-explanatory; it lets air flow through the unit so that it will run cooler and more efficiently. If there isn’t enough air flowing through your air conditioner, it can cause a variety of issues like reduced efficiency of cooling or even damage to your unit. You should always ventilate an AC if you have left it unattended for some time. It also prevents your AC from becoming too hot and damaging itself due to excessive heat build-up inside it while you’re not around.

Cleaning Your Air Conditioner

It is important to clean your air conditioner once in a while, especially if you have pets or children. If you don’t clean your air conditioner after every use, the dust and dirt inside it can cause damage to your unit. In addition to this, it also increases the chances of mold growth inside the unit. It is best to clean your AC once or twice a year depending on how often you use it.

Replacing Your Filters

It is important to replace the filters in your AC at regular intervals so that they can trap all the particles that enter it and prevent them from entering into its system and affecting its efficiency. The filters should be changed at least once every six months in order for them to work effectively and efficiently.

What To Do After Draining A Portable Air Conditioner?

1. Remove the Filter

This is a very important step that you must take before venting and draining a portable air conditioner. If you don’t remove the filter, your AC will not function properly. It can cause damage to your AC unit, as well as electric shock to yourself or others.

2. Unplug and Disconnect the Power Cord

After removing the filter, unplug and disconnect the power cord from your AC unit. This way, there will be no chance of electric shocks when you drain and vent it.

3. Move the Air Conditioner to an Outside Area That Is Free From Debris

Since your AC unit has a filter, you will probably have a lot of debris inside it. Move your AC to an outside area that is free from debris so that it can be properly drained and vented.

4. Open the Vent on the Top of Your Portable AC

This is where the water will come out once you drain and vent your air conditioner. Open the vent on top of the unit to let out the water that is in there. You can also drain this by opening the drain hose in front of your unit or by opening any other drainage hole in your AC.

Safety Concerns When Venting A Portable AC

  • Improper Venting – If you don’t vent your portable AC correctly, heat can build up inside the unit. This can result in a fire. Therefore, it is important to make sure that you are draining your AC correctly.
  • Low or No Pressure – The second concern when venting a portable AC is low or no pressure. If the pressure is low, the air coming out of the vents will be too cool for you to feel comfortable with it. Therefore, it is important to check that your AC has enough pressure before venting it.
  • Airflow – The third concern when venting a portable AC is airflow. If there isn’t sufficient airflow coming out of the vents, your unit will not be able to cool down effectively and quickly enough for you to use it anytime soon after draining and vented properly


If you own a portable AC, you need to know how to properly drain and vent it. Draining your portable AC every time you use it and venting it correctly will help prevent corrosion, reduce the risk of CO poisoning, and keep your unit running efficiently. If you don’t know how to drain a portable air conditioner, don’t worry. All you need to do is follow these simple steps, and you’ll be draining your air conditioner like a pro in no time.

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