The average cost to repair a residential water heater typically ranges from one hundred fifty to six hundred dollars, depending on the specific component that has failed and labor rates in your region. Minor repairs, such as replacing a faulty thermocouple, gas control valve, or an electric heating element and thermostat, usually land on the lower end of that spectrum. More complex or labor-intensive repairs, such as replacing a leaking pressure relief valve, wiring harnesses, or blower motors on power-vent units, can run higher. If the inner steel tank itself is leaking, repairs are impossible, requiring a full system replacement.
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