As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED. DOES NOT RESET. GROUNDED - YES. FOUND PREV. FLT FAULT FOR LEFT TEMP SENSOR. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST REF. B737-800 FIM 21-62 TASK 801. FAULT CLEARED WITH NO CURRENT FAULTS. RAN #1 PACK. OPS. NORMAL.