What was found
DURING CLIMB, CHECKED ECAM, NOTICED AFT CARGO TEMPERATURE OVERHEAT INDICATION, 212 DEGREES. TURNED AFT CARGO TEMPERATURE SELECTOR TO FULL COLD AND CARGO TEMPERATURE DECREASED TO 201. CONFERRED WITH MOC AND TURNED OFF CARGO HEAT SWITCH, TEMPERATURE CREEP TO 213 AND THEN XX. FLIGHT ATTENDANT COULD NOT FEEL HEAT FROM FLOOR IN AFT GALLEY OR TO MID CABIN, DIVERTED. ON LANDING TEMPERATURE INDICATION RETURNED, SHOWED 220-230 AT GATE.. MAINTENANCE PERFORMED TROUBLESHOOTING IAW TSM 21-43-00. CARGO TEMPERATURE SENSOR FAULTED IAW TSM 21-43-00-810-817-A. REPLACED AFT CARGO BAY RELAY 17HC IAW AMM 21-43-15 .