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Q » Why does my HVAC smell bad when running?

Steven

08 Dec, 2025

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A » A foul odor from your HVAC system could result from mold or mildew growth due to accumulated moisture or a clogged air filter trapping debris. Additionally, burnt wiring or components may emit a distinct smell. Regular maintenance, including cleaning ducts and replacing filters, can prevent these issues, but if the smell persists, professional inspection is advisable to ensure safe and efficient operation.

Michael

09 Dec, 2025

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All Other Answer

A »A foul smell from your HVAC when running is often due to mold or mildew growth, typically caused by moisture buildup. Check and replace dirty filters, clean ducts, and ensure proper drainage to resolve the issue. Regular maintenance can also help prevent future occurrences.

David

09 Dec, 2025

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