As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SIDEWALL AT SEAT 19 FELT WARM WITH SMELL. S/O BALANCE PACK SUPPLY BY USING ZONE TEMP CONTROL VLV. MOVED VLV TO WARMER POSITION, TRIED TO GET VLV BACK TO COOLER POSITION AND OVHEAT LIGHT ILLUMINATED. CREW UNSURE WHAT THEY HAD AND TALKED ABOUT DIVERTING WHILE TRYING TO T/S THE PROBLEM. REPLACED AFT ZONE TEMP VALVE.