As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO CONTROL TEMPERATURE OF FWD AND AFT CABIN IN AUTO MODE. PERFORMED BITE CHECK OF BOTH TEMP CONTROLLERS REF M/M 21 61 00 NO FAULTS FOUND. FOUND BOTH CABIN TEMP SENSOR FILTERS DIRTY REMOVED AND REPLACED BOTH CABIN TEMP SENSOR FILTERS PER M/M 21 61 06 SYSTEM OPS CHECKS NORMAL.