How to Get Roaches Out of Air Conditioner


You may want to remove roaches from the air conditioner if they are infesting your house. These annoying insects are often ignored, but their population can be dangerous to everyone living in a home. Roaches can cause respiratory problems and allergic reactions when ingested.

How to Get Roaches Out of Air Conditioner

In addition, you should not let these pests live inside your walls because they might end up nesting there and spreading. In this article, I will be discussing how to get roaches out of air conditioner. So let us get started.

Do Roaches Damage the Air Conditioners?

Well, it is not that roaches are destroying the AC itself. It’s just they create a lot of odor and contaminates allergens when they take shelter inside your air conditioner.

Usually, you won’t notice this because you don’t stay at home every day to check out if your AC has new tenants or not. You only find out when the smell starts kicking in, but by then, it’s already too late to get rid of them.

Suppose there’s one thing we all love about the summer season – besides its tropical weather-is our air conditioners since they keep our homes cool. However, keeping our air conditioners clean and free from pests seems impossible during these hot days.

In fact, many homeowners would likely have encountered several problems after getting roaches in the air conditioning system, and it is truly not an easy thing to get rid of them.

For those worried about having cockroaches inside their AC, there are a few signs that you should look for, such as live sightings or feces on your air conditioner’s vents, which may be mistaken as bird droppings.

And then again, sometimes these pests would make themselves comfortable hiding in hidden places so expect some other signs like bug bombs or pesticide cans near your air conditioner and even dead roaches behind the appliance itself.

Step-wise Guide on How to Get Roaches Out of Air Conditioner

Step 1: Examine the Air Conditioner

Please take a deep look into your conditioner and examine it completely. You may find some hidden areas closed by a grille. Open them if you have to. You will need to clean those areas to make sure that no cockroaches are hiding inside the AC unit.

If any such area remains uncleaned, they will start multiplying again, resulting in further infestation later on. So just for your own good, don’t forget to thoroughly inspect the entire air conditioner for cockroaches or other pests before starting with the cleaning process.

Step 2: Vacuum Cleaning Trick (for soft surfaces)

If you have found out that there are still no cockroaches inside the AC unit, you should not be relieved yet. There may still be many places where they can hide even though you see nothing with your naked eye. For example, sometimes cockroaches like to make their nests near or on soft surfaces such as wires and cables. Therefore, you should vacuum clean all such spaces to kill all undetected cockroaches.

Cleaning Ac By Vacuum Cleaner

Step 3: Spray Foam into Seams (for Hard Surfaces)

If your air conditioner has hard surfaces on its body, then this method will most probably help you to kill all the unseen roaches hiding in there. Just spray foam into every tiny space between hard surfaces of an air conditioner that seems inaccessible otherwise. This solution will work perfectly for the hard surfaces of your air conditioner.

Acid-based foam is highly poisonous for roaches and anything else that comes in contact with it. The foam will not be able to reach cockroaches hiding in soft surfaces, but for some reason, you want to kill every single cockroach inside the AC unit, then this method can help you do that.

Step 4: Use a Professional Pest Control

If none of these ways helped you get rid of cockroaches from an air conditioner, then you should call pest control immediately because doing such work on your own can be pretty dangerous sometimes.

A professional company has many ways to control pests even when hidden away somewhere unreachable by common household pesticides and poisons, using techniques involving different chemicals and equipment such as ‘hot shot’ to be sprayed into the air conditioning unit or a ‘gunk gun’.

Step 5: Clean Outdoor Condenser Unit

Cleaning the outdoor condenser unit is another step that homeowners must take to avoid further cockroach infestation. If you find any insects on your air conditioner, then try to catch them alive without damaging them using a sponge, paper, or anything else that can help you do so safely.

Then, take the caught insect outside, and once there release it somewhere far from your home because if you leave it inside your house; other cockroaches will come crawling out of fear for their lives and since they don’t seem like finding their way back (if they ever did come from inside your AC unit), they will most probably die if you don’t get them out.

Also, check for water leaks on the outdoor AC unit of your air conditioner because cockroaches love these places to take shelter during hot summer days, and that way, they can keep away from being dehydrated, which is a lot worse than death itself.

Finally, make every effort possible to eliminate any possible source of water from near or around the condenser so that there is no chance for roaches to find their home near your house where it is more comfortable for them.

Cleaning Outdoor Consider

Precautions While Performing How to Get Roaches Out of Air Conditioner

  • Ensure no one is present when the cleaner is sprayed, as this might lead to human death due to gas poisoning.
  • Do not spray on flowers or plants, as they are sensitive and may die after being exposed to chemicals for a prolonged period of time.
  • Keep all people and animals away from the room air conditioners while spraying roaches out of them. That will help avoid accidents occurring due to breathing in gasses contaminating the area around them.
  • Children must also be kept away from the area sprayed for getting rid of roaches who may inhale insecticide by mistake and get ill, thereby suffering an injury that can prove fatal if not treated properly within the time limit (depending upon the amount ingested).
  • Also, ensure that your pets or animals are not exposed to insecticide since they have sensitive bodies and might die if sprayed on them.

Which Pesticides Are Suitable for Roaches?

Pesticides are widely used to get rid of roaches! The common pesticides include boric acid, oil, or aerosol insecticides. Many homeowners opt to use these when dealing with a roach problem in the house rather than professional services because they save money and can do it themselves.

How Long Do They Last?

Boric Acid Stored Properly:

It is straightforward to store properly because it doesn’t have any special storage. You need a small jar and place the bait inside tightly. Once you put the bait into a corner where roaches frequently go through, roaches will find and eat it. One thing that makes this hard for pest control professionals is the long time frame between treatment and seeing any results.

Sugar-Based Baits:

These baits work on the principle that roaches are attracted to sweet things and continue to return for more. Basically, when a roach eats it, it will stick to their stomach and slowly reduce them until they die of hunger. As far as effectiveness goes, this one is on about par with high pesticide concentration sprays.

Cooking Oils:

Some people use cooking oils mixed with ant poisons or boric acid powder to deal with a cockroach problem in your house effectively. Since it’s only used internally by the roaches, it means that most of them won’t avoid poisoned food sources once they are already inside your house and can’t smell any danger signs from outside.

Professional Pest Control:

Professionals have several effective ways to deal with roaches. Some examples include gels, powders, and spray pesticides which can be used for extra effectiveness. However, you’ll need professional help if you want to clear your house completely, as many different types of live insecticides that are used are too dangerous for the general public to handle.


I hope this article has helped provide all the relevant information on how to get roaches out of air conditioner. Thank you and have a nice day!

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