What was found
CABIN TEMP SELECTOR TURNED UP TO MAX AND COCKPIT IS STILL COOLER THAN DESIRED. TRIM AIR OFF RESTORED CABIN HEAT. ACFT GROUNDED. BITE CKD BOTH TEMP CONTROLLERS FIM 21-61, TASK 801 NO FAULTS LOGGED. GVI LT PACK FOR LEAKS, NO LEAKS NOTED. OPS CKD FLT DECK TEMP CONT AND INDICATION IAW AMM 21-61-00, OPS CHECKED NORMAL. ALL GROUND FUNCTIONAL TESTS PASS. UNABLE TO VERIFY DEFECT. NO HISTORY 30 DAYS.