As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK LIGHT ILLUMINATED ON RECALL LIGHT EXTINGUISHED UPON PRESSING MASTER CAUTION TO RESET. GROUNDED - YES. RAN PACK/ZONE TEMP CONTROLLER BITE TEST FOUND TCV FAULT RAN SYSTEM CHECK REF B737-800 AMM 21-61-00 SYSTEM OP CHECKS GOOD RESET TEMP CONTROLLER NO DEFECTS NOTED.