When a water heater pilot light goes out, the safety thermocouple cools down instantly, tripping the internal safety valve to shut off all gas flow. As a result, the main burner will no longer ignite, and your water heater will stop producing hot water entirely. Stored water in the tank will gradually cool down to room temperature over several hours. To restore hot water, you must follow proper safety protocols to relight the pilot flame manually. Verification: Test hot water taps after relighting the pilot to confirm heating operation resumes normally.
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