The answer to 'water heater making noise' is that a noisy water heater is often caused by sediment buildup, mineral deposits, or a failing heating element. Symptoms can include rumbling, popping, or knocking sounds coming from the tank. While some minor issues may be DIY-friendly, it's generally best to call a professional plumber to diagnose and repair a noisy water heater.
Sediment buildup is a common cause of water heater noise. Over time, minerals and other particles can accumulate in the bottom of the tank, causing the water to boil and create rumbling or popping sounds. This can be addressed by flushing the tank, but if the sediment is extensive, it may require a professional to fully clean the tank.