Home air conditioning systems largely work behind the scenes of our everyday lives, quietly keeping us cool and comfortable while out of sight and out of mind. Unfortunately, because our AC largely operates in the background, we don’t always notice issues until there’s a total breakdown of our AC system. Fortunately, there are a few ways to tell if something is wrong with your AC system before a breakdown occurs. One telltale sign that your HVAC system may develop problems is persistent odors from your AC. Below, the experienced technicians with ourair conditioning companyoutline a few of the most common AC smells and what they mean.

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Rotten Egg Smell

The most important odor to be aware of is the smell of rotten eggs, as this could be a gas leak. This odor is similar to rotten eggs because of the sulfur additive in natural gas. If you ever smell a rotten egg scent from your AC, you should open your windows, turn off the gas supply, evacuate your home, and contact your gas company immediately. 

Burning Or Gun Powder Smell

Burnt smells can be an indication of an electrical issue, such as a broken capacitor, a faulty circuit, a poorly lubricated motor, or a faulty fan belt. A gunpowder-like smell may indicate a fried circuit board or fan motor. Be sure to turn off your HVAC unit right away if you notice a gunpowder scent, and contact our HVAC contractors immediately. If left unattended, issues related to burning smells could lead to a fire.

Chemical Smell

Chemical smells could be an indication of a refrigerant leak. This odor could be accompanied by low cold air output and a bubbling or hissing sound. Additionally, you may find a layer of ice on your outdoor unit if there is a refrigerant leak. If you notice a chemical smell or discover a refrigerant leak contact our experienced HVAC technicians.

Moldy Smell

Moldy, mildew smells are the most common odors in AC systems. Air conditioners remove humidity from the air and ensure the home retains a normal amount of moisture. Unfortunately, microbial growth can occur if an excessive amount of moisture collects in the AC unit or condenser. If you notice a moldy smell coming from your AC, contact our HVAC technicians as soon as possible.