As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN TEMP (ALL ZONES) DIFFICULT TO CONTROL. SEEMS EASIER WITH TRIM AIR OFF. ACFT GROUNDED. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITES IAW FIM TASK 21-62-801 WITH NO LOGGED OR CURRENT FAULTS. FOUND CONTROL CABIN, FWD & AFT CABIN SENSORS CLOGGED WITH DEBRIS. CLEANED SENSORS IAW 21-61-06. RAN PACKS ON GROUND AND CONTROL NORMAL WITH ZONE TEMP SELECTORS.