What was found
SHORTLY AFTER TAKEOFF, THE FLIGHT DECK AIR TEMPERATURE BECAME UNCONTROLLABLE. BECAME EXTREMELY HOT. SUPPLY DUCT TEMPERATURE IN THE CONTROL CABIN POSITION SHOWED 70 DEG C. DESPITE TURNING DOWN THE TEMPERATURE CONTROL KNOB IN AUTO AND TURNING IT TO THE OFF POSITION. THE DUCT TEMPERATURE DID NOT DECREASE. NO CAUTION LIGHTS CAME ON AT ANY TIME. NO CAUTION LIGHTS CAME ON WITH RECALL, TEMPERATURE CORRECTED ITSELF AFTER 30 MINUTES. ACFT GROUNDED. VERIFIED CONT CABIN TEMP SENSOR FILTER IS CLEAN. ACCOMPLISH PACK/ZONE TEMP. CONTROLLER BITE TEST, BOTH CONTROLLERS SHOW NO FAULTS. ACCOMPLISHED CONTROLLER CABIN TEMP CONTROLLER IND, OPS TEST, TEST PASS. RAN BOTH PACKS FOR 1HR WITH ALL TEMP SELECTORS IN AUTO. AFTER 1HR TURNED OFF PACKS AND EAC COMP PACK/ZONE TEMP CONT. BITE, STILL NO FAULTS. REF MM 21-61-07-710-013-002 & 21-61-00-700-807-002.