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Jennifer BrownSep 4, 2025
Why is my A.O. Smith 100 Water Heater making sizzling or rumbling sounds?
- SSydney WebsterSep 4, 2025
Sizzling or rumbling sounds in your A.O. Smith water heater are often caused by sediment or calcium buildup in the bottom of the tank. To resolve this, clean the sediment from the tank. Refer to the Draining instructions in the Maintenance section of the manual.