As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN TEMP, FWD & AFT VERY DIFFICULT TO CONTROL. GETS TOO HOT OR TOO COLD WITH SMALL CONTROL MOVEMENTS. ACFT GROUNDED. FOUND FWD CABIN AFT CABIN TEMP SENSOR FILTERS VERY DIRTY. R & R FWD AND AFT CABIN TEMP SENSOR FILTERS REF AMM 21-61-06 AND ACCOMPLISHED CABIN TEMP, OPS CHECK REF AMM 21-61-00 WITH NO DEFECTS NOTED.