As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START CONTROL CABIN ZONE TEMP LIGHT ILLUMINATED. MASTER CAUTION LIGHT EXTINGUISHES AFTER RECALL. ACFT GROUNDED. PACK/ZONE TEMP CONTROLLER BITE IAW MM 21-61-00-700-806-002 SHOWED RT PACK/ZONE TEMP CONTROLLER FAULT FOR CONTROL CABIN TRIM VALVE. PERFORMED INITIAL EVALUATION FOR CONTROL CABIN TRIM VALVE FAULT IAW FIM 21-62, TASK 832 - INITIAL EVALUATION DID NOT CONFIRM FAULT. PACK/ZONE TEMP CONTROLLER VERIFY TEST PASSED.