Water heater makes popping, rumbling, or banging noises during heating.

Safety: Turn off power or gas and allow water to cool before flushing.

• 1. Drain and flush: Connect a hose to the drain valve, open a hot faucet, and drain several gallons. Then briefly open the cold supply to stir sediment and continue flushing until water runs clear.
• 2. For electric models: Inspect and clean or replace elements if heavily scaled.
• 3. Consider water treatment: Install a water softener or scale reduction system to minimize future buildup.