As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH CABIN TEMP CONTROLLERS FULL HOT F/A'S COMPLAINING TO COLD. TEMP GAUGE SHOWS MAX TEMP OF 24 DEG AT 48DEG TAT 21 DEG. ACCOMPLISHED FIM TASK 21 61 00 810 863/864 AFT/FWD CABIN AUTO TEMPERATURE CONTROL DOES NOT OPERATE. PER STEP F1 FOUND FILTERS DIRTY. CLEANED FWD AND AFT CABIN FILTERS AND OPS CHECKED FWD AND AFT CABIN TEMPERATURE INCREASES CHECKS GOOD.