7:30am-5pm Monday-Friday | 4300 Creek Road
Blue Ash, Ohio 45241
call us (513) 621-4620
The National Difference: Longest running Bryant dealer in Cincinnati

Why Does My Air Conditioner Smell Funny?

Why Does My Air Conditioner Smell Funny?You expect your AC to emit cool air but not strange odors! If your air conditioning system smells funny or just plain bad, National Heating and Air Conditioning is here to help!

Check out these AC troubleshooting tips for smelly cooling systems. They may help you pinpoint the problem—or they could raise red flags that it’s time to give us a call for professional AC repair service.

Troubleshooting Strange AC Odors

Believe it or not, air conditioners can emit a range of odd odors, and each can indicate a different or unique issue. Identifying what you’re smelling can shed some light on what’s causing the smell and what needs to be done to get rid of it.

Musty or Moldy Odors from an AC Unit or Vents

Musty, foul, or mildewy odors coming from your air conditioner can be caused by:

  • Dirty air filters: If the air filter in your cooling system is grey and caked with dust, it could be causing the smell. Luckily, AC filters are easy and cost-effective to replace! We recommend doing at least once every two months to avoid this problem, promote system efficiency, and improve the air quality in your home.
  • Dirty or moldy evaporator coils: Evaporator coils are essential to cooling the air that moves through the system and into your home. Condensation frequently forms on the coils, meaning they need to be cleaned regularly to prevent mold—regular AC maintenance usually covers this need!
  • A clogged condensate drain line: The condensate drain line handles all of the humidity that your evaporator coils trap, moving it safely out of the home. Dust and debris can clog this line, and that can cause leaks from the AC, contributing to mold to grow.

Rotten Smell from AC Vents

The rotten smell of a decomposing animal is most likely exactly that: animals can get into ventilation systems, and they can often get stuck in there. Sometimes, the smell is simply a result of vermin, and the stronger the smell is, the more likely it is that a dead critter is stuck in your system.

Burnt, Sulfurous, or Melting Plastic Smell from the AC Unit

If you smell something burning, shut off your cooling system ASAP, and call local experts for help. Sulfurous, burning, or melting plastic smells usually point to electrical problems, which can be risky at best—and very dangerous at worst. Specifically, anything from a damaged wire to an unsafe electrical connection can cause this smell, and getting the proper repair ASAP is essential to avoiding a fire hazard and preventing more damage to your system.

Schedule Air Conditioner Services in Cincinnati, Ohio

If you’re dealing with funny smells from your air conditioning system, you can always trust that National has you covered. Our AC repair teams have seen, smelled, and fixed it all, and you can count on our decades of experience for the quality repair service that you need and deserve.

Contact us now online or call (513) 621-4620 to schedule AC repair in Cincinnati and Hamilton County, OH!


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The information on this website is for informational purposes only; it is deemed accurate but not guaranteed.
It does not constitute professional advice. All information is subject to change at any time without notice. Contact us for complete details.