As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED EXCESSIVELY HOT AIR BLOWING FROM CABIN GASPERS WHILE IN FLIGHT, THE FLIGHT CREW WAS UNABLE TO CONTROL VIA CABIN OR FLIGHT DECK CONTROLS. THE CREW ELECTED TO DIVERT FLIGHT AND LAND. THE MAINTENANCE CREW DETERMINED THE TEMP CONTROL VALVE WAS DEFECTIVE. THE MAINTENANCE TEAM REMOVED AND REPLACED THE ECU TEMPERATURE CONTROL VALE WITH OVERHAULED UNIT. OPS CHECKS WERE SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE.