While A.O. Smith water heaters are engineered for high reliability, they can encounter several standard operational issues over their lifespan. One of the most frequent problems is mineral scale and sediment accumulation at the bottom of storage tanks, which causes loud rumbling noises, reduces heating efficiency, and can lead to localized overheating. On gas models, thermocouple degradation, pilot assembly failures, or electronic control valve glitches frequently prevent burner ignition. Electric models occasionally experience burned-out heating elements or tripped high-limit thermostat switches. Additionally, sacrificial anode rod depletion over time leaves the inner steel tank vulnerable to internal corrosion.
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