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. TURNED OFF CARGO HEAT SWITCH, TEMPERATURE CREEPED TO 213 AND THEN XX. FLIGHT ATTENDANT COULD NOT FEEL HEAT FROM FLOOR IN AFT GALLEY OR TO MID CABIN, DIVERTED. LANDING TEMPERATURE INDICATION RETURNED SHOWED 220-230 AT GATE.. MAINTENANCE PERFORMED TROUBLE SHOOTING IAW TSM 21-43-00. CARGO TEMPERATURE SENSOR FAULT TSM 21-43-00-810-817-A. REPLACED THE RELAY 17HC. REPLACED AFT CARGO COMPARTMENT TEMPERATURE SENSOR 14C IAW AMM 21-43-15.