If your water heater pilot light will not stay lit, follow a systematic troubleshooting process. First, hold down the pilot button for a full 60 seconds upon ignition to ensure the thermocouple heats up thoroughly. If it still goes out, clean the thermocouple tip with fine sandpaper to remove soot. If cleaning fails, replace the defective thermocouple. Additionally, check for strong drafts in the utility room or verify that the combustion air intake vents at the base of the water heater are not clogged with dust and lint. Verification: Relight the pilot and monitor it to ensure uninterrupted operation.
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