As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD AND AFT CABIN TEMP HYPER-SENSITIVE TO INPUTS IN AUTO MODE. ACFT GROUNDED. FOUND THE CABIN TEMP SENSOR FILTERS DIRTY. REMOVED AND REPLACED THE CABIN TEMP SENSOR FILTERS IAW AMM 21-61-06. PERFORMED CABIN TEMP CONTROL AND IND OPERATIONAL TEST. OPS CHECKED NORMAL, IAW AMM 21-61-00, AND AMM 21-61-20.