The answer to 'air duct moldy' is that mold growth in air ducts is a common problem that can have serious health and home maintenance consequences. Mold thrives in warm, damp environments, and can easily build up in ductwork if there are any leaks, condensation, or poor ventilation. Symptoms of moldy air ducts include musty odors, visible mold growth, and increased allergy or respiratory issues for occupants.
The best solution is to have the air ducts professionally cleaned and any underlying moisture issues addressed. This is not a job for most homeowners, as it requires specialized equipment and expertise to properly clean and disinfect the ductwork. Attempting DIY duct cleaning can often make the problem worse by spreading mold spores. It's important to hire a qualified HVAC or mold remediation contractor to ensure the job is done safely and effectively.