As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CABIN ZONE TEMP LIGHT ON RECALL. GROUNDED - YES. ACCOMPLISHED PACK TEMP CONTROL BITE IAW B737-800 FIM 21-62-00 - #2 ZONE TEMP CONTROLLER SHOWED FLT DK TRIM VALVE FAULT. CLEARED FAULT DURING BITE CHECK. RAN BITE AGAIN - NO FAULTS NOTED. NO HISTORY PAST 30 DAYS.