What was found
NEED TO REPLACE ZONE TEMP CONTROLLER DUE TO FWD, MID, ZONE TEMP FAULT. VERY ERRATIC ON ECS PAGE. VERY ERRATIC ON ECS PAGE. REPLACED ZONE TEMP CONTROLLER. FWD AND MID CABIN TEMPS ROSE TO 76 AFTER 30 MIN AT 69. MOVED CTRL SLIGHTLY, NOW BACK TO 69. FWD AND MID INDICATE INOP,NO ECS PAGE TRIM VALVE POSITION VALUES FOR AUX FWD,FWD,AUX MID,MID.FLIGHT DECK TRIM AIR WORKS IN MANUAL,INOP IN AUTO. AFT INDICATES OK. REPLACED K238 RELAY. REPLACED ZONE TEMP CONTROLLER, OPS CHECK AND BITE NORMAL.