Pests That can Damage your HVAC System in Raleigh

bugs in hvac unit in raleigh nc

Your home should be a place that you and your family feel safe in. You expect to be protected from the outside elements, including pests and other uninvited guests.

That said, pests don’t always listen to the rules. In fact, pests have a way of finding their way into your home through a variety of different channels. Doors that are left open and rips/tears in your screen are some of the more common ways that a pest may enter your home. But did you also know that pests can get in through your home air conditioning and heating system?

Below are some of the most common pests that can get into your HVAC system


  • Mice – The most common pest that can damage your HVAC system is a mouse. In addition to causing pollution in your air ducts, from droppings, rotten food and other bacteria,  mice can trigger an electrical fire in your HVAC system. Mice and rats notorious chewers and they’re more than happy to snack on your insulation, sealants, and wiring.
  • Roaches – Interestingly, damage is not the primary concern with Roaches in your HVAC unit. A roach in your HVAC system however, does create some major concerns with diseases and bacteria.
  • Ants – Ants are attracted to the electromagnetic field of a homes air conditioning condenser. A single ant may not be able to cause much destruction, but a colony of ants certainly can.
  • Raccoons – Believe it or not, it’s not uncommon for a Raccoon to make their way into your HVAC system. Being the largest pest on this list, you can imagine the amount of damage a raccoon can cause to your HVAC system. In addition to causing potential electrical problems raccoons can also block the air circulation within your vents.

raccoon on hvac unit

The Best Ways to Deter Pests?


Did you know that  spraying ducts or vents with pesticide is not recommended? Experts agree that spraying your ducts will not only be ineffective, you’re also putting you and your family in a dangerous situation. Considering the amount of  airborne particulates that will be traveling through the system and into your home, you’ll want to find a better and more permanent solution.

Seal Your Air Ducts. According to, you should pay attention to the parts of your home where air enters and exits. Sealing your systems air ducts and ventilation system is the most effective way you can prevent pests from entering your HVAC system. In addition to preventing pests from entering, properly sealed ducts can help you save money on your energy bill!

Have your HVAC System Maintained. Did you know that a local HVAC company such as Raleigh Heating and Air can help you avoid issues with pests in your HVAC system? An HVAC maintenance visit from a licensed HVAC technician can help proactively identify pest-related issues with your system that may result in damage down the road.


If your system has already been impacted by pests, it’s highly recommended that you contact the experts to solve the issue. Cleggs Pest Control has been providing pest control service in the Raleigh area since 1984! Contact us here online to schedule your FREE initial inspection, or speak to a local pest control hero by calling us at 888-MRCLEGG!