As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES ON RECALL RESET EXTINGUISHES LIGHT. GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE TEST PER B737-800 FIM 21-62 TASK 801. ISOLATED FAULT, LEADING TO REMOVAL & REPLACEMENT OF (LEFT) TCV 139 IAW FIM TASK 21-62 & B737-800 AMM 21-51-10. OPS CK & LEAK CK GOOD.