Recognizing the warning signs that a water heater is failing can prevent catastrophic tank bursts and major home water damage. Common indicators include rumbling, popping, or banging noises from inside the tank caused by boiling water trapped beneath hardened sediment layers. Other clear warning signs include rusty or discolored hot water, fluctuating water temperatures, moisture pooling around the base of the unit indicating an internal tank leak or failing gasket, and a complete lack of hot water recovery. If the outer steel shell begins leaking, immediate replacement is mandatory.
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