Why My Air Conditioner Stinks | Custom Air System Skip to main content

There’s nothing worse than when you turn on your air conditioner on a hot day, ready for that blissfully cool air, but instead, are treated to an awful stench. Foul odors are one of the more common air conditioner problems, but they don’t always have the same cause. Here are five of the most common reasons that your air conditioner stinks and what to do about it.

Mold or Mildew

Mold and mildew are likely to form in any areas with excess moisture. Because your air conditioner removes humidity from the air, it needs to get rid of it somehow. If your air conditioner’s drain pan is clogged or your house is overly humid, you may begin to smell an odor similar to sweaty socks. Depending on where the mold is located, you may simply need a part replaced, or you might need a deep cleaning of your duct system.

Engine Troubles

If the motor in your air conditioner is having problems, you might smell exhaust fumes. This is likely because of a chemical fluid leaking in the engine, giving off the smell as it evaporates. In this case, you should turn off your system right away and call a professional AC repair service.

Gas Leak

Your air conditioner uses a gas called methyl mercaptan, which gives off a skunk smell. This gas is profoundly harmful if inhaled, so you and your family should get out of the house right away. Then call an AC repair expert to ensure the problem is handled as safely as possible.

Dead Animal

It’s not fun to think about, but small animals, like rats, possums, and raccoons, can crawl inside your air conditioning ducts. Sometimes, they die in there. As the body begins to decay, it releases the smell of sulfur, which most people compare to rotten eggs. An experienced AC repair technician can locate the animal, remove it safely, and treat the area to remove any lasting residue.

Short Circuits

The fan motor and circuit boards in your air conditioner can short out from time to time. Because of the spark that is created, you might detect the smell of gunpowder in the air. Aside from the smoky aroma, a shorted circuit board disrupts the operation of your system and puts you at risk of a fire. An air conditioning repair specialist can replace your circuit board and get everything appropriately reconnected.

For All Your AC Repair Needs

Give Custom Air Systems a call. We provide 24-hour AC repair in Houston, and we can have your system pumping out that wonderful, cool air once more. We’ll help keep your system running smoothly throughout the seasons, so get in touch with us today to schedule your first appointment.


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