Do Roaches Like Air Conditioning?

Do Roaches Like Air Conditioning?

Many households have air conditioners. On the other hand, these devices can be an issue if you are coping with the cockroaches. Air ducts and HVAC systems work throughout your house. As we know, the window air conditioning units are placed outdoors, which may attract the pests. So you need to check them frequently.

Cockroaches are attracted to air conditioners. Air conditioning units and HVAC systems provide a moist area, with some places even including a water supply. And the air conditioning system produces a significant quantity of heat, which cockroaches like. The confined and gloomy nature of AC units offers a secure retreat. In the air filters, perhaps there is food for roaches to eat.

Even the best-sealed HVAC system is vulnerable. During the warmer summer months, cockroaches may seek refuge in your air conditioning to escape the heat. Roaches can obtain extra energy from the heat the air conditioners create during the winter. There are, however, some good methods to prevent cockroaches from getting into your air conditioning equipment.

Do Cockroaches Like Air Conditioning?

The answer is yes. The air conditioning does not attract roaches. And roaches don’t like cold weather. The AC units, on the other hand, can attract these insects. Some pests can be attracted by the byproducts of the air-cooling system and the ac units.

Why Do Cockroaches like air conditioning?

Why Do Cockroaches like air conditioning

Roaches are attracted to four factors that your air conditioning system provides:

  • Food
  • Temperature
  • Shelter
  • Moisture

Let’s take a closer look at each of these cockroach requirements.


Cockroaches are omnivores, which means they eat nearly everything.

Cockroaches will devour the following organic matter:

  • Hair
  • Human dander
  • Dry skin
  • Decaying matter
  • Their feces

Though your air conditioning system can take in your house’s air to chill it, it inhales some organics. Then, the air filter can carry many organics before it cycles back into your rooms. Some may make their way into your air conditioning system. The organics are still there for the bugs to devour until you change into a new air filter.


Roaches can survive at temperatures ranging from 77 to 86 degrees Fahrenheit.

This temperature range is commonly in the unconditioned places where your air handler is located.

When the temperature in your house is in that temperature range, roaches will typically travel to conditioned regions where the temperature is more pleasant for them.


Cockroaches can hide in their shelter. They love dark locations to live in. That is why you will discover them in your house’s crevices like cupboards and drawers.

As the air handler is in a dark closet or attic, it offers roaches with a haven that can be far from the human disturbance.


Cockroaches, like every other pest, need the water to live. And the air conditioner may offer a good water source, depending on the type of air conditioning unit you have. This is particularly right if it is referred to be Oriental cockroaches. They prefer to live near the bodies of water. They will readily infect and spread microorganisms in these spaces.

A puddle of water collects in the base of evaporative coolers, for example. This permits ordinary air to pass over the water, cooling it down. It is then dispersed as chilly air inside your house. These air conditioners may supply a nice, stable water supply for the roaches.

However, not all air conditioners give this benefit to roaches. Water is no longer used to chill air in modern air conditioners. Condensate is the technical term for what most people think of as water. A pipe called the condensate line is in charge of this condensate. And this moves the accumulated liquid to the exterior of your property.

However, some better AC units do not require this condensate line. During the cooling process, they don’t produce condensate.

Why do the cockroaches come out in the heat?

Cockroaches are very active in the summertime, and they can move a lot for food. According to pest management specialists and entomologists, the heat might drive cockroaches to engage in behaviors they don’t do, such as flying.

When cockroaches are subjected to excessive heat, they strive to look for more comfortable living circumstances. They try to move to a cooler area, which might lead to an infestation in your house.

Pests need to consume more energy when the temperature rises. Their growth needs a pleasant temperature, and they are more active when they find a suitable environment to survive.

How to Check If Your vents Have Roaches Inside

How to Check If Your vents Have Roaches Inside

Are roaches entering your home through your vents? Some vents are safer than others. Cockroaches in your vents are more likely to be present if you have any following issues.

The vents are surrounded by vegetation. Vegetation provides a haven for a variety of insects. If there are branches, shrubs, and vines near the vents, they make it easier for cockroaches to come inside.

The vents are damaged or cracked. And the cracked vents don’t allow the cockroaches to get inside. If the bend is destroyed, larger insects such as rats might come through. Air ducts and vents would be inspected on a regular basis.

There are no screens on your vents. This makes it impossible for roaches to get through. And sealing around the vents is also a good idea.

Can Roaches come in through window AC units?

Cockroaches, unfortunately, can get inside the air conditioners. Because of their shape, the machines can even act as a highway to your house.

According to some researches, cockroaches can squeeze through even the tiniest crevice. The gap is enough 3ven if it is only 3 millimeters.

If you have an air conditioning system, roaches have even more opportunities to infiltrate your house. Ventilation systems are commonly found in the basement, attic, and walls. This provides many access areas for cockroaches, allowing them to:

  • Enter the air conditioning unit, then move via the vents and then get into your rooms.
  • Use the seals between the vents and walls.
  • Squeeze through crevices in the air ducts.
  • Once they get inside your house, crawl into floor vents.

Do roaches like cold rooms?

Roaches dislike the cold temperatures, and therefore exposing them to the cold conditions may cause them to flee and look for a warmer habitat. However, certain species can survive at colder temperatures if there are water and food.

Because the roaches are cold-blooded, they are unable to adjust their body temperatures. Despite their adaptability, these species cannot live in extreme cold, and it has a significant impact on them.

When cockroaches are exposed to temperatures below 0° F, they will die.

Cockroaches, on the other hand, have a psychological reaction to the cold temperatures. If you put them in a spot and gradually reduce the temperature, they may be able to adapt to the lower temperature and survive. However, if they are suddenly exposed to frigid temperatures, their bodies will not adapt to the cold and die soon.

Why Are Roaches in Air Conditioners Such a Big Problem?

Cockroaches in the vents are a major issue. If you have allergies, it’s one thing you will get. Allergies and asthma can be worse by their excrement, saliva, and skin shedding. When the air conditioner is turned on, allergens can spread throughout your home.

Roaches will degrade the air quality in your home, though you don’t have allergies. You may find that their noxious stink pervading your household. The cockroach excrement will get inside, even though you freshen the air in your home.

The most serious issue is that cockroaches which have made their way into the vents can be difficult to eradicate. Because air ducts are a component of a house’s internal AC units, finding an infestation might be challenging. Few insect treatment companies will really enter the airways, and homeowners will find it virtually hard to do so by themselves. To remove the cockroaches that have made their way into the vents, you’ll usually require a full pest control solution.

What Damage Can Roaches Do In AC units?

What Damage Can Roaches Do In AC units?

It’s critical to get rid of any cockroaches in your AC units. They have the potential to do a lot of damage if left alone, such as:

  • Invading your ceiling, vents, and walls
  • The population is growing very fast, and they can get into your primary residence.
  • There are shedding or defecating skins within the unit so that the air in your house is contaminated.
  • Nests are built up against air intake vents or filters, obstructing them.
  • Wires in AC units are being eaten.

Roaches can make kids asthma. Adult cockroaches may get respiratory problems due to the polluted air disseminated by an HVAC system or an infected air conditioning unit. People who have asthma and weakened immune systems are very dangerous.

How to prevent cockroaches from coming through the air conditioner

We will offer a few methods you should do if you have cockroaches in the AC units:

  • Don’t Use Sprays

The insecticide should never be sprayed directly into the vents or air conditioners. If roaches are lurking inside, it’s quite impossible that you can kill them. Then, A squirt can do so. The cockroaches are probably already aware of your presence. They’ll move to other areas of the vents or the Air conditioners that you can’t reach.

  • Make your house roach-proof

You don’t need the roaches to enter your house via your air conditioning system.

Follow these steps to make your house roach-proof:

  • Keep your house clean on a regular basis. This includes cleaning off any surface where food has been stored and spilled on the floor.
  • To prevent roaches from entering your house, close windows, and doors and then seal any gaps.
  • Reduce the temperature to below 77 degrees Fahrenheit. Cockroaches don’t like cold temperatures. Therefore, lowering the temperature below 77° F in your house will deter the cockroaches from entering your home. And you may feel cold, but keeping the cockroaches out of your house is an important task.
  • Store the food well
  • Remove any leaking water source, such as plumbing pipes.
  • Call a Professional

In such circumstances, you may require the assistance of a professional. These experts will have the following tips:

Preventative Measures. A professional can assist you in identifying problems that need to be addressed. After that, the specialist can advise you on how to avoid the cockroaches from returning.

Treatments. It isn’t easy to get rid of the cockroaches, especially if they’ve infested your vents and walls. Treatments can be repeated by a professional.

Specialized knowledge. This will aid the specialist in pinpointing the exact location of the cockroaches’ nest.

Insecticides are more advanced. This will prevent toxins from entering your house through the fans.

  • Clean your Air Conditioner

Cleaning your air conditioner is the first step in roach prevention. It’s a good idea to get your air conditioner cleaned each year professionally.

For most AC units, A simple clean is sufficient, but not for the units with a roach infestation. These must be completely cleaned, with every cranny and nook fully examined. There should be no food sources left behind.

  • Install Air Filters

Air filters act as a barrier between inside and outside. However, these come standard on most models. Filters that connect to the openings of the air vents are also available in the stores. These give an extra layer of the protection because they’re:

  • Filters out dirt, dead skin, or excess hair, all of which attract roaches.
  • It’s easy to cut to size if buying bulk sheets, leaving no openings for cockroaches.
  • It’s made of a strong mesh that keeps pests, debris, and dirt out.

Air vent filters, on the other hand, place more pressure on your ventilation system. To suck in air through the thicker filters, it will have to use more energy. Only put them in places where people spend the most of their time, such as bedrooms.

In the event of a cockroach infestation, you can install air filters in areas where you suspect roaches are present. You can remove the air filters once the roaches have been eradicated.

Author Ethan