As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER CABIN EXCESSIVELY HOT WITH CABIN CONTROL KNOBS TURNED TO FULL COLD. ACFT GROUNDED. PERFORMED CABIN TEMPERATURE CONTROL AND INDICATION OPERATIONAL TEST WITH LT, RT, AND BOTH PACKS WITH NO DEFECTES NOTED IAW AMM 21-61-00-700-807-002. ETOPS GROUND VERIFICATION SUCCESSFUL.