Determining whether it is worth repairing a water heater depends primarily on the age of the unit and the financial cost of the fix relative to a full replacement. If a water heater is less than six years old and experiences a minor part failure—such as a faulty thermostat, igniter, or upper heating element—repairing is usually a cost-effective choice. However, if the unit is over ten years old or has developed a leak in the inner steel pressure tank, repairs are impossible, making immediate replacement mandatory to avoid catastrophic property damage.
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