The answer to 'air duct water damage' is that it is a common problem that can have several causes, such as leaks in the HVAC system, flooding, or high humidity. Symptoms may include visible water stains, musty odors, and increased dust and debris in the air. Solutions can range from cleaning and drying the ducts to repairing the underlying issue.
If the water damage is minor and caught early, you may be able to clean and dry the ducts yourself. However, for more extensive damage or if the problem persists, it's best to call in a professional HVAC cleaning and restoration company. They have the expertise and equipment to properly assess the situation, clean and disinfect the ducts, and address the root cause to prevent future issues.