As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ON WHEN RECALL IS PUSHED. PACK LIGHT EXTINGUISHES WHEN MASTER CAUTION RESET IS PUSHED. GROUNDED - YES. TROUBLE SHOT PER B737-800 FIM 21-53 TASK 821. APPEARS TO HAVE BEEN AN INTERMITTENT FAULT. PAC TEMP CONTROLLER VERIFICATION CHECK SHOWS NO CURRENT FAULTS.