As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT, CREW REPORTED VERY HOT AIR COMING FROM THE AIR VENTS. CABIN TEMP WAS UNCONTROLLABLE AND REACHED 120 DEG F. AIRCRAFT DIVERTED AND LANDED SAFELY. MAINTENANCE DISCOVERED COCKPIT TEMP CONTROL VALVE LINE SWAPPED WITH CABIN TEMP CONTROL LINE. LINES WERE CORRECTED.