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Top Causes of AC Odors and Poor Indoor Air Quality

HVAC in Fort WorthAt Brown Service Co., we know there’s nothing like coming home to a fresh, cool house with perfect indoor air quality after a long summer day outside. One thing that can ruin the moment quickly, however, is coming home only to notice your air conditioner emitting a particularly rotten smell. This can happen for many reasons, and most all of them benefit from professional inspection and maintenance. Here are three potential causes of foul odors from your air conditioner.

Dirty Filter

The simplest reason your air conditioner emits an unpleasant smell is also the easiest to fix. If your air filter hasn’t been cleaned or replaced in a while, it’s likely the cause. An air filter can collect significant amounts of dust and debris over time. If it’s severely dirty, the filter will pass these scents into your air via your AC.

Clogged Drain

Even the best HVAC in Fort Worth can get bogged down periodically. Over time, water and dirt can accumulate in an air conditioner’s condensation chamber. Unfortunately, most people would probably never notice this until it becomes a problem. If left untreated, stagnant water and dirt can turn into literal cesspools that give your home the indoor air quality of a swamp.


If you are identifying a foul odor from your air conditioner and pick up a scent that resembles feces, that may be exactly the case. In hot months, small animals like squirrels or mice can make their way into the cool condensation chamber of your AC unit. This can lead to two unfortunate, pungent side effects. If these intruders make their home in the unit, you can expect to notice the smell of feces over time. If they get stuck, the poor critters may die and leave you and your whole house with the smell of decomposition.

Tackling AC and Air Quality Issues

For help identifying a foul odor from your air conditioner and for professional cleaning services, call your local indoor air quality experts at Brown Service Co. at 817-284-9204.


Use our form to estimate the initial cost of renovation or installation.

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