do cockroaches like air conditioning

Air conditioning is essential across the United States. If you’re facing insects, however they can pose an issue. HVAC units and their air ducts are a part of your house. The window ACs are open to the world outside that could be considered an open door for bugs. This concern is legitimate.

The air conditioner can draw the cockroaches. HVAC units and AC units provide humid and moist habitat as well as an open water sources. The air conditioning process produces heat, which is what cockroaches love. Air conditioners are dark and enclosed creating a secure refuge. Air filters could also have food available for roaches to consume.

Even the most sealed HVAC system can be at risk of being invaded by cockroaches. In hot summer months the cockroaches might seek your air conditioner for an escape from the harsh weather. When it is cold, roaches are able to gain energy through the heat that it produces. But there are methods you can prevent cockroaches entering the AC units.

The reason why air conditioners attract roaches

The discovery of cockroaches in the ducts and air conditioners is not uncommon. This is the case with AC units as well as HVAC systems too since they create a comfortable living space.

Air conditioners provide plenty of resources for cockroach colonies to take advantage of. The roaches aren’t just drawn to the areas and can flourish in the air conditioners due to the following reasons:


Roaches require water to live. Based of your AC unit you are using your air conditioner might be a reliable source of water. This is particularly the case with regard to the Oriental Cockroach that prefers to live close to water sources that are open. They can easily infest these areas and spread the bacteria.

Evaporative coolers for instance are often surrounded by a pool of water that is gathered at their base. This lets normal air be circulated around this water and then cools it down. Then, it is blown out into the home as cold air. Based on their design they AC units are able to offer a relaxing, easily accessible water source.

But that, it is not the case that all AC units offer this benefit to insects. Modern AC units don’t make use of water to cool the air. Instead, what we think of as water is technically called condensate. The condensate is dealt with by a hose known as the condensate line. The condensate line transports the liquid that has accumulated to the exterior of your house.

The more efficient units don’t require this line, but. They typically do not produce condensate as a result of cooling.


Apart from the water, roaches are fond of dark places. The inside the AC unit provides the perfect environment. They’re also set in isolated areas for example:

  • A closet
  • A small corner at the back of the house
  • The attic

AC units can generate quite a lot of noise. This is why many designers of homes to keep them out of areas with a lot of activity.

In addition they are usually linked to thermostats. There is no reason for anyone to adjust temperatures manually. It’s beneficial for you, however, it’s also convenient for roaches too. They will not be at risk of being spooked by predators which allows them to move and breed free of restriction.


Window units are usually installed near bathrooms, kitchens or other areas that are subject to many people. This means that roaches can use these areas to search for food sources. Even if you’re careful in getting rid of crumbs and spills even the tiniest amount of food may draw a roach.

The AC may contain food in it. They work by sucking air from the interior of homes. If the air has dirt that is trapped, it can be absorbed into air filters. If they aren’t often cleaned they could provide food to rodents. This is because roaches are omnivores which means they can consume nearly all organic matter. Air filters that are dirty may include:

  • Dirt
  • Dust
  • Dry skin
  • Hair
  • Cockroach Poop


Cockroaches are most active when they are in warm areas. AC units, even though they blow cold air into your home, provide an ideal source of heat for the cockroaches. It is due to three major factors:


The AC systems are powered by electric which creates plenty of heat. Roaches have been reported to be a problem for electronic devices due to this. Some common hot spots include:

  • Routers
  • Televisions
  • Console games

Some roaches are even more likely to be infested by AC units. For instance The German Cockroach is well-known for choosing electronics over hiding places.


Apart from electrical power, AC units generate heat by cooling air itself. In the end, once the heat is removed by the air it will need to be transferred somewhere.

To move the heat from the unit as well as the house and the home, fans inside push cold air away. It is easy to feel the heat when you put your hand on the rear of the unit. This is a cozy clean place for cockroaches to hunker down.

The best use is during the summer months.

Roaches are active more in the summer and your AC is running more frequently. This is a double-whammy.

  • Roaches are active and are therefore more likely to seek shelter.
  • Your air conditioner is more efficient, it is able to provide a better, more reliable shelter.

Under these conditions, expect to see roach populations increase to the point of extinction.

Do Cockroaches Live In Air Conditioners?

You can clearly see that the air conditions provide a great hub for cockroaches of every variety. If they are able to locate a suitable spot in the area they’ll build a nest. Once they’ve found a spot it is unlikely that they will be removed. That’s because:

  • Humans aren’t likely to pull out a functional AC unit and locate them.
  • Cockroaches are agile and need only a tiny space within an AC unit to build a nest.
  • Roaches can get in the and out of AC units, which allows them to find food quickly.
  • The shelter is ideal for eggs laid by roaches and their the growing offspring. This helps the population expand.
  • Cockroaches will not be a problem for predators in this area like cats or birds.

Of all the locations where a roach can live the AC may be the most suitable.

Do Roaches resemble air Conditioning?

The air conditioning system itself isn’t a magnet for insects like cockroaches. Actually the frigid air and loud noise repel the cockroaches. However, the equipment itself is a magnet for these insects. The appearance that is incorporated into the AC unit as well as the byproducts of the air-cooling process are appealing.

Do Roaches Feel Like Cold Air?

Cockroaches tend to be not as active when in colder conditions because they’re cold-blooded. If temperatures fall too low, roaches could be:

  • Slow
  • The feeling of being lethargic
  • Disorientated
  • Incapable of reproducing
  • You can enter a hibernation-like state

Therefore, they favor warm weather over cold ones. If temperatures outside get to a high point they will search for cold air to keep themselves safe. It doesn’t matter if it’s above or near 95 degrees Fahrenheit , they will be uncomfortable. It could encourage insects to search for the AC unit to provide an opportunity to cool down.

Do Cockroaches hate air conditioning?

As we’ve mentioned there are a variety of advantages to AC for Cockroaches. However, it doesn’t mean that AC is completely free of faults, however. A loud engine and the working components in an AC unit can be a threat to roaches. When they’ve got other options for shelter water, food, and shelter They may walk by.

Also the cold air an AC unit generates can hurt an ant. If a roach gets into the wrong place of an HVAC system, it could be flooded by cold, icy air. The body’s temperature, and make it be sluggish. In this condition it could be in a position to hunt for food and escape danger or reproduce.

If temperatures fall to below freezing, the animal may even be in a hibernation state. It will then be starving and then end up dying. Cockroaches are known to hide in a warmer area of the air conditioner.

However, roaches can evade these issues. They can make a noise that is not noticeable provided there’s enough refuge and food. In the same way, if they feel the coldness of the air it is possible to flee to warmer areas. Cockroaches are tolerant of the negatives, and appreciate the benefits.

Are Roaches able to enter through Air Conditioners?

Unfortunately, cockroaches can infiltrate air conditioning units. Due to their design, they could be used as a way towards the interior of your house.

Based on in the Proceedings of the National Academy of Sciences Roaches can get through the tiniest crack. A gap of as little as 3 millimeters can be sufficient.

If you own the HVAC unit, you have more opportunities for roaches to get into your home. Ventilation systems are often woven throughout your walls, attic and even your basement. This can provide a variety of entrance points for roaches and can also:

  • Get into the floor vents when you’re inside your home
  • Make sure you squeeze into the cracks that are along the air pipes
  • Utilize the seals that are between walls as well as vents
  • Then, enter the AC unit and then go through the vents to the rest of your home.

Are Cockroaches able to get in through Window Air Cooling?

Additionally, roaches could utilize windows AC devices to get entry to your home. They are installed in windows that is then closed over them. The spaces around the unit must be filled in using chalking, boards or even insulation. If this isn’t executed correctly it is possible for a roach to get into the tiny gaps.

The back part of an AC is open to the elements. Cockroaches could be able to get into the air intake vents. If the room is in disarray there could be cracks in its metal frame or box. The cockroaches could also exploit these areas to get inside.

Once they’ve settled inside your window air conditioner they are able to crawl out from the opening in the front. This allows them to wander around the house at their own pace.

What kind of damage can they cause in AC Units?

It is essential to eliminate all cockroaches and flies from your air conditioner. If they are left unattended they could cause significant damages, for example:

  • Wires are eating wires
  • Nests of constructions build up against the air intake or filter vents which blocks them.
  • Defecating or shed skins inside the unit. This could release contaminated air into your home.
  • Population is growing and spilling into your primary residence
  • They are spreading their colony throughout your vents, walls, and even the ceiling

Roaches are known to trigger asthma, particularly for children. According to an article in Allergy Asthma and Immunology Research. The airborne contaminants emitted through an affected AC device or HVAC unit could cause respiratory problems in adults. those with compromised immunity, asthma or old are the most at danger.

How to handle cockroaches in Air Conditioning Vents

There are many ways to combat roaches within the AC unit you have:

Set up Air Vent Filters

Air filters act as an air barrier between the outside and the interior that is your AC. The majority of units come with these filters as standard. But, you can purchase filters that are attached to the vent openings of the vents. They provide an additional protection as they’re:

  • Made of a sturdy mesh, it is able to block dirt, debris and insects
  • It can be purchased in large sheets and then cut to size, leaving no space to allow insects to breed.
  • Ability to filter out excess hairs, skin cells that are dead or dirt, which could draw rodents

In this way air vent filters add to the load on the ventilation system. They will have to use more energy to push air through the more dense filters. It is suggested to put them in areas in which people spend the majority of their time, such as bedrooms.

If you are experiencing an infestation, put filters in areas where you think there are rats. Once the roaches have been eliminated, you can take out the filters.

Clean Your AC

Cleansing the inside of your AC is the very first thing you can do towards preventing the roaches. It is recommended to make sure that you have the AC professionally cleaned at least once a year. If the area you live in has lots of dirt or dust it should be more often.

A quick wash is sufficient for the majority of homes however, not so for those that have an infestation. They must be thoroughly cleaned down, and each space and crevice inspected. There should be no food source that should be left out.

Contact an Exterminator

In extreme situations you might require the assistance of an exterminator. They will be able to:

  • Advanced insecticides that can be used locally. This can prevent the poison from spreading throughout your home through the fans.
  • A specific analysis. This will allow the professional to determine exactly where roaches are settling.
  • Follow-up treatments. Roaches aren’t always destroyed in one swift drop, particularly if they’re infesting your walls or vents. A professional can perform repeated treatments.
  • Steps to prevent. A professional exterminator can help you determine the issues that require attention. After that, the expert will suggest steps to stop cockroaches from returning.

Do not use sprays

Do not spray insecticide directly into or through the AC unit or into the vents. It’s likely to kill roaches if they’re hiding within. Sprays are only effective to a certain distance. It is likely that the roaches have already been aware of the presence of you. They’ll move to the most remote corner of the unit or even vent.

Instead, you’ll spread this poison in your home via the vents. Insecticide may take some time to completely disperse. It can cause serious harm on humans if breathed in.

How Can I Stop Bugs from entering air Conditioners

In the case of the roaches in your home, prevention is better than treatment. Here are some suggestions to ensure you don’t have to deal with roaches inside your AC.

Close Gaps

If you believe that roaches may have got into your home via the cooling system, check for any gaps. They could be:

  • Within your walls
  • On the vents
  • In your attic
  • On the edges of the window The AC unit
  • The seals on your HVAC system.

If you discover any gaps, it is recommended to fill them in with weather-stripping made of foam. This material expands into the middle between the gaps, creating a sealing between cracks. For small gaps, use rope caulk to seal the holes.

Additionally, it can help you save money on energy. There are fewer gaps, which means less air leaks, which means less strain on cooling your home.

Examine for cracks in vents

Vents are an ideal entry point for the cockroaches. So, be sure your HVAC or AC unit does not have open spaces in these areas. To determine if there are leaks, put an incredibly thin piece of toilet paper in front of seams when you’re HVAC system is operating. The toilet paper shouldn’t be:

  • The seam is then sucked into
  • You’re blowing away your hands

If the vent doesn’t pass the test, you need to:

There are situations in which you cannot fill cracks on your own. The areas that should be being left to a professional are:

  • Sections that are disconnected
  • The areas that are damp
  • Spots that have mold

If you do it yourself or with the help of a professional be sure to do your homework. While roaches won’t be infesting each air conditioning unit they come across however, they are a major refuge for the insect. When a colony has established it’s roots, immediately take action to get rid of the colony. of the infestation.