As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START CONTROL CAB ZONE TEMP ILLUMINATED ON RECALL. LIGHT WENT OUT AFTER RESET. FOLLOWED QRH. ACFT GROUNDED. CLEANED CONTROL CABIN TEMP SENSOR ASSY FILTER IAW MM 21-61-06. PACK/ZONE TEMP CONTROLLER BITE REF MM 21-61-00 SHOWED TRIM VALVE FLT DECK, NR 2 CONTROLLER, ON BIT AND PREV FLT VERIFY GO. CLEARED ON RESET, NO HISTORY 60 DAYS.