Woman wondering why her AC is acting up

Why does it smell bad when my air conditioner runs?

We install air conditioners to help us feel comfortable in our homes. But when you start to observe unpleasant odors coming from your cooling system, it’s more than just annoying. It can greatly impact your home comfort.

Where do the smells come from?

Start with what the odor smells like. If the odor resembles a rotten egg, this could be a indication of a gas leak. If this is the case, you should open your windows, turn off the gas supply, evacuate the home and contact the gas company. Be sure to have the gas company turn it back on for you. It’s not something you want to mess around with.

If it doesn’t smell like rotten eggs, you probably have a different issue.

Just like anything in your indoor space, if your air conditioner isn’t cleaned well or taken care of, there’s a good chance that dirt and dust will develop. And because components of your air conditioner aren’t front and center, cleaning them can often go overlooked.

Buildup of mold, dirt and other particles is one of the more typical culprits of odor with air conditioners. It can occur with the coils, drain pain, air ducts or even your filter. However, ongoing maintenance can help decrease this buildup and reduce the probability that an unfriendly smell starts spreading throughout your space.

Heat and moisture can contribute to increased mold growth, especially in warmer climates. Not only can mold and mildew induce a nasty smell, but it can also negatively impact the quality of air in your house.

It’s also possible that a tiny creature navigated into your duct system and died. You can turn off your air conditioner and either give our team or pest control a call to come and remove the animal.

What can I do?

Analyze your filter. This is a usual culprit for air conditioner odors. If it’s been a long time since you’ve changed your air filter, replace it with a brand new one. We typically recommend changing your filter every three months. But it’s also vital to keep in mind other elements that would require you to replace it more repeatedly, such as pets in the home or if a family member has allergies or asthma.

If you’ve exchanged the filter and it’s not helping, it’s probably time to call in an expert. Especially if it’s been an extended period of time since your last air conditioning checkup. They can review the situation to see if a thorough cleaning can do the job. You may also want to consider having your air ducts cleaned. Professional duct cleaners can take a look to see if your indoor air quality would improve from a proper cleaning.

If you have concerns about the odors in your home, Davis Heating & Air Conditioning can help you review the situation and chat about possible solutions. You should be able to enjoy your cool indoor space in the warmer summer months, without having to suffer with undesirable odors. You can schedule an appointment with our team online or give us a shout at 540-369-3790.

Back To Blog