If your cooling system was a body the air ducts would be the respiratory system.
Air conditioning smells like attic.
The homeowner s guide to the 7 causes of bad ac smells.
Other contaminants in your hvac system will do the same if left unattended.
Here is useful information on the smells that may be coming from your air conditioning vents.
The key is to keep enough circulation of warm air through the ducts to avoid condensation when extreme cold in winter.
Ducts in attics maybe accumulating condensation during the winter when the attic is cold.
Also known as bacterial growth mold and mildew will circulate through your indoor air once it has settled in your air conditioner.
If your hvac unit smells like it might be overheating it very well could be.
However some smells like rotten eggs or gas are more serious.
They carry air to your living spaces.
If wet for more than a couple days mold grows generating a musty odor.
Since then the a c has smelled like the attic though we notice nothing from the heat in the winter.
Here are 5 common hvac odors and what they indicate.
But if air ducts leak disconnect in a dirty non living area like your attic or crawl space they draw in the surrounding air which is usually filled with dirt dust and mold spores.
Must mildew and mold.
I recently when up there and taped up all the joints nipples and boots so minimize cold air blowing into the attic or being sucked from the attic.