7 Reasons Why The Air Conditioner Smells Bad

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7 Reasons Why The Air Conditioner Smells Bad

Your air conditioner must work efficiently to provide cool, clean air. Every time you turn on your air conditioner, you expect it to blow fresh and pleasant-smelling air.

Your air conditioner may give off a severely foul smell, disturbing your home’s environment. Several factors can affect indoor air quality and make the air conditioner smell bad.

7 Reasons Why Your AC Smells Bad

There are various explanations for why your air conditioner might relieve bad smells. Listed below are the seven most common ones:

  • Faulty Air Conditioner

The roots of the burning smell from the air conditioner may link to an overheated motor. Overheating could be due to wiring issues or any other mechanical problem.

Burning smells are dangerous signals and require immediate action. If the smell persists, then you should look for a technician for an air conditioning repair in Pasadena job.

  • Refrigerant Leak

A refrigerant leak can produce leaking smells. Owners can sense gas whenever they turn on their air conditioners. In such an instance, you should consult an expert technician to inspect the problem thoroughly and get the necessary repairs done.

  • Mildew And Bacteria

The air conditioner is a dehumidifier that removes moisture from the air every time it runs. Depending upon the drainage, slope, and run time, standing water may get collected in the duct and evaporator coil, causing bacteria and mildew.

Cleaning and maintaining the drainage system can prevent the problem. Therefore, homeowners should search for air duct cleaning near you to get an efficient solution if the smell persists.

  • Smells Coming from Rodents

Some rodents and critters can crawl into the ducts in search of some warmth, especially during the winter season. They may get trapped inside, resulting in rotten smells.

  • Poor Maintenance of Air Conditioners

Not cleaning the air conditioner can elevate the chances of bad smells from the air conditioner. Musty odd smells indicate that your air conditioner requires a clean-up. Owners can get instant AC service in Pasadena, MD. A quick clean-up will help you to get rid of these unpleasant smells.

  • Smells from Cigarette Smoke

The air conditioner may emit a stale smell if it accumulates cigarette smoke. Regular cleaning can help to reduce the occurrence of these smells.

  • Inefficient Running of Air Conditioner

There could be chances that the air conditioner is not working efficiently. If this happens, the air conditioner might not dehumidify as effectively. It can trigger a musky smell due to lingering humidity.

If the problem increases, owners must schedule a tune-up so that the technician can check the refrigerant levels and air conditioner and ensure that the air conditioner is functioning optimally.


No homeowner wants to experience unwanted awful smells from their air conditioner.

Loves Heating and Air Inc is one of the most trusted companies that offers owners the best services to overcome all the problems related to air conditioners. We provide the best HVAC technicians for repairs, replacements, maintenance, and other HVAC services. Contact us today.

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