Relighting a water heater pilot light yourself is completely free, requiring only a few minutes of your time and careful adherence to safety instructions. However, if you choose to hire a professional licensed plumber to come out and relight the pilot—or diagnose why it keeps blowing out—service call and labor fees typically range from $150 to $250. The cost only escalates if the underlying root cause is a defective thermocouple or faulty gas control valve that requires complete hardware replacement. Verification: Confirm the pilot flame stays lit steadily after relighting to avoid paying unnecessary service fees.
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