Indoor Bryant system produces loud banging or booming noises when starting or stopping cooling.

Safety first: Normal precautions; most work is on ductwork, not live electrical parts.

Steps:

• 1. Open vents: Ensure most supply registers are open to reduce static pressure.
• 2. Replace filter: A dirty filter increases static pressure and duct noise. Install a clean filter of appropriate MERV rating.
• 3. Inspect accessible ducts: In attic or basement, look for ducts that flex or pop when the blower starts. Add additional hangers or supports as needed.
• 4. Seal loose joints: Use UL-listed foil tape or mastic to seal loose duct joints that may be popping.

Note: Persistent noise may require duct redesign by an HVAC contractor.