Inconsistent room temperatures, higher energy bills, whistling or rattling noises from the ducts, visible dust or debris around vents, or apparent tears, holes, or disconnected sections in the ductwork may indicate the need for air duct repair. Furthermore, if your HVAC system cycles frequently or if your indoor air quality is poor, you may have air duct problems Professional inspections can precisely diagnose any issues and determine whether repairs or replacements are required.