As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED HOT AIR OUT OF THE LOWER AIR REGISTERS, THE FREON SYSTEM NOT ABLE TO COMPENSATE FOR THE EXCESSIVE AIR DISCHARGE.TROUBLE SHOT THE SYSTEM AND FOUND THE PRSOV PRESSURE REGULATION SHOT OFF VALVES NOT REGULATING AIR TEMPERATURS.