But, animals can also get in the unit and die, creating a really bad odor. It is caused by the build up of mold and bacteria on your evaporator coil. Unfortunately, that mildew-y smell wafting in with your cool air probably is exactly what it smells like. 1. Musty or Moldy Smell. So how do these things start growing in your air conditioner? And call us at 813-609-5015 to check out your home for an inspection. For larger air conditioners, an assistant may be required to lift the unit. And if you don’t know how to clean a window air conditioner, then keep reading. There are solutions for that. Miller's Heating & Air July 2, 2018 Hi Mick, An air conditioner smells like mildew or mold is probably the most common symptom of central HVAC systems. On top of cleaning the inside of those ducts, there are probably some leaks that need to be fixed to prevent future growth. In your bucket, mix a solution of ½ cup bleach, 1 tablespoon mild dish soap, and 3 gallons hot water. this works but careful where you put water. Air Conditioner Air Filter (may contain mold mildew and cause bad smell) Evaporator Coil Mildew/Mold – A musty smell from your central AC can be caused from a dirty evap coil. Foul, musty smells emanating from an old air conditioner could be the result of dirt and grime buildup on the condenser fan blades and cooling element. Dirty sock syndrome is the foul, moldy smelling odor that comes from your air conditioner when you first turn it on. Duct cleaning and repair is most definitely a job you’ll want done right – so call the professionals. Mold and mildew can build up when they find a nice damp, dark place to hide, and sometimes that includes your air conditioning system. I love doing my own auto work and sharing DIY tips and tricks with my readers. 4 Reasons Your AC Smells Musty. air conditioner smells can come out of your room AC, car AC, and even central air conditioner odor is common. To eliminate odor from a car air conditioner, sit in the car, but make sure the car, AC, and fan are all turned off. Must, Mildew, and Mold; If there is excess humidity or moisture in the HVAC system, you could end up with mold and mildew … Using a soft brush such as the type used to remove lint from a dryer vent, stroke the fins up and down to remove debris caked on to the front and rear of the air conditioning unit. Mold spreads and grows easily and before you know it, you can have mold growing throughout the room. Luckily, most air conditioner smells occur because of a dirty or clogged air filter, and all you have to do is clean or replace the filter. ... Types of Bad Air Conditioner Smells . A musty or moldy smell could be likened to smelly feet or dirty socks. I also power-washed the inside front grill. Unfortunately, if that cool air is accompanied by a musty, mildew-y scent, you’ve got some work to do. If you’re tired of the musty, mildew-y smell hanging around your house, get help from the professionals today! 5 Reasons Your AC Smells Bad. The goal here is to clean the area with bleach and water, then flush the bleach out with water. If you're not sure whether or not there is mold in your air conditioner, you can have a mold remediation professional come in and inspect it. Thank you MikeCOIndiana, informative and what I like even better, relayed in such a pleasant way :), Thank you so much for sharing your knowledge. If your air conditioner’s filter is dirty and clogged, this may result in your AC smelling musty. When you run into a problem with your central air conditioner, including an unexplained odor, it is best to try the simple fix first. Add a little moisture, and you’ve got everything you need. The most likely culprits include the following: 1. They are heavy. Should i follow the steps of taking it apart and cleaning the whole unit? Wipe off any surface dust or debris with a damp cloth. Posted on May 28, 2018 (February 28, 2020) by hls_admin. If there's a drainage problem, water may have pooled and mildew may have grown on the filter, condenser coil, or somewhere else inside. Will that even help? If your air conditioner smells moldy, the general cause is accumulation of water in the drain pan or drip lines (or ducts in case of ducted systems), which can cause fungus or mildew to grow. Air conditioning odors usually come from mold and mildew that accumulate from condensation on the refrigerator coils, in a clogged drain pan, or leak in the system. Musty Smells & Your Air Conditioner – What You Can Do. Strange Smells & Your Air Conditioner. Clogged Filter: Among the most common reasons of a foul odor emanating from your portable air conditioner is a clogged filter. 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