No, replacing a thermocouple on a hot water heater is a straightforward DIY repair that most homeowners can complete in 20 to 30 minutes using basic hand tools like an open-end wrench or small pliers. Callout type="warning" title="Gas Safety Warning": Always turn the gas control valve to the "OFF" position and ensure the pilot has cooled completely before beginning work. Disconnect the thermocouple nut from the gas control valve, unscrew it from the burner bracket, insert the new thermocouple, and tighten connections snugly without over-tightening. Verification: Relight the pilot light and confirm it remains lit steadily after releasing the control button.
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