As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE CABIN TEMPERATURE COULD NOT BE CONTROLLED AFTER TAKEOFF. AIRCRAFT RETURNED TO AIRPORT AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED THE CROSS BLEED VALVE. THE LEFT HOT AIR SHUT OFF VALVE WAS ALSO REMOVED AND REPLACED. OPERATION CHECKS WERE PERFORMED USING MAINTENANCE MANUALS AND AIRCRAFT WAS RETURNED TO SERVICE.