As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COCKPIT TEMP ALMOST IMPOSSIBLE TO KEEP IN COMFORT RANGE. EITHER TOO HOT OR TOO COLD. FLT CREW REPORTS WITH TRIM AIR SYSTEM OFF & PACK SYSTEM IN AUTO PACK IS CONTROLLABLE. TRIM AIR DEF PROBABLE CAUSE. BITE OF ZONE TEMP CONTROLLER FOUND NO FAULTS. RE-ESTABLISHED SYSTEM AND COMPLIED WITH PACK TEMP CONTROL OPS CHECK IAW. ALL SYSTEMS CHECK NORMAL.