Top Reasons behind those Air Conditioning Odors

By Robert Perez | Air Conditioning

Jun 12

Air conditioning systems are commonly used in homes to enjoy nice, steady cool temperature throughout the home. However, if a nauseating odor is laced with the cool air, it’s likely to ruin the refreshing sensation. Of course, you want to eliminate the cause of nasty smell immediately. Read on to learn more about the reasons behind various air conditioner (A/C) smells and how to resolve them.

Air Conditioning OdorsMildew-like Odor

As the most widely recognized odor accompanying cold air from an air conditioning unit, a moldy odor without a doubt implies fungus or mold growth is developing in or around the A/C. Though, this doesn’t really come as a surprise. In any case, A/C’s also remove extra moisture other than cooling the air in your home. If it’s not dried up as it should be, mold may start to develop on parts with lingering moisture. Call a professional A/C to deal with this issue and thoroughly remove the mildew smell.

Sewage-like Odor

This smell may be coming from a ruptured sewer vent pipe or backed up sewer line near the duct system. All it takes is a little methane gas from the sewage leak to get into the ductwork, and your whole house will smell like a sewer. Methane gas is unsafe, so contact an HVAC technician immediately once you smell a sewage odor.

Feet-like Smell

A clogged, dirty A/C may give off a stinky feet smell. This is triggered by stagnant water that accumulates in the system and isn’t drained away properly. A full cleaning by an expert should be enough to resolve the problem.

Gun Powder Smell

A shorted out fan motor or circuit board may emit a gunpowder smell out of the supply registers when the A/C initially cycles on. An expert A/C technician can take a look at the cooling system and recommend replacing aging parts if needed.

Smelling Like Exhaust Fumes

Your A/C is powered by electricity, not gas, but the engine and a few other components have fluids inside that can leak out. When this occurs, the odor of exhaust fumes may fill your home. To stop a damaging circumstance from emerging, have the A/C fixed immediately.

Rotten Eggs Smell

A dead animal is the most common cause of a spoiled or rotten egg smell coming from the air vents. A sick or injured bird or rodent may have clambered inside an air duct during the winter where it perished and started decomposing. Now, when you turn on your A/C for the first time in the summer, a strong odor ruins the effect of cool air permeating your home. You should have your ducts professionally cleaned as soon as possible to get rid of any rodent remains.

Skunk-like Odor

This odor could be caused by a dead skunk in or around the ductwork, but that’s not very likely. What’s much more probable is that gas is leaking from somewhere. Methyl mercaptan from the gas leak, which smells so much like skunk spray, may be permeating the ductwork and flowing around your home. In this case, get out of the house immediately and call your gas company and an HVAC expert immediately.

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