As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT CHECKLIST, LEFT PACK LIGHT ILLUMINATED WITH RECALL. PACK LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. FOUND PACK TEMP CONTROLLER BITE PROCEDURE ON BOTH CONTROLLERS PER B737-800 FIM 21-62 TASK 801. REST CONTROLLERS & NO FAULTS FOUND.