A hot water heater running constantly without stopping usually indicates a continuous draw of hot water from a hidden plumbing leak, a running toilet connected to hot lines, a failed thermostat, or a stuck heating element. If warm water is constantly drawn out of the tank, the unit must keep firing burners or drawing electrical current to reheat incoming cold water. Furthermore, poor tank insulation can increase standby heat loss. Verification: Check all household faucets and toilets for leaks and verify thermostat functionality.
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