Performed water heater repair on Bradford White RG250T6N in Lincoln, AL. Diagnosed failed thermocouple using multimeter. Replaced with OEM part #239-45991-00. Cleaned burner assembly and pilot orifice. Inspected anode rod, found 70% depleted, replaced with magnesium anode. Flushed tank to remove sediment. Checked T&P valve operation. Adjusted gas pressure to manufacturer specifications. Verified proper burner ignition and flame characteristics. Tested for carbon monoxide leaks. Restored hot water supply and confirmed consistent output temperature.