What was found
1.5 HR INTO FLT, F/A'S REPORT THE BURNT WIRE SMELL IS BACK. DOES NOT APPEAR TO BE COMING FROM AIR VENT BUT IS PRESENT IN ACFT GALLEY. COFFEEMAKERS & OVENS WERE OFF AND NOT USED. TURNED OFF GALLEY POWER. F/A REPORT SMELL LIGHTER NOW, 10-15 MINUTES LATER OPS CHECKED ALL AFT GALLEY LIGHTS, OVENS, AND COFFEEMAKERS AND FOUND NO DEFECTS OR ODORS. FOUND COFFEE WARMER 1 EMITTING STRONG "BURNT" ODOR. REPLACED SAME. ALSO REPLACED COFFEE WARMER 2 AS PRECAUTIONARY. OPS CHECK GOOD. NO ODORS IN AFT GALLEY. A/C OK FOR SERVICE.