As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN TEMPERATURE CONTROL WAS VERY ERRATIC IN AUTO CABIN TEMP WOULD RANGE FROM VERY HOT TO VERY COLD WITH EXTREMELY SMALL MOVEMENTS OF TEMP CONTROLS. ALSO LARGE DIFFERENCES (TEMP) BETWEEN FWD & AFT SELECTIONS OF MAIN CABIN. NO PERMANENT FRC FOUND (FAULT REPORTING CODE) C W FIM TASK 21 61 00 PG501 NO FAULTS LOGGED OPS NORMAL. FOUND FLT DECK SENSE FILTER PLUGGED CLEANED. SEAMC ETOPS ADVISED. NOTE: GRND VERIFICATION TEST GOOD.