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 AND GOES OUT ON RESET. GROUNDED - YES. PERFORMED ZONE TEMP CONTROLER BITE REF B737-800 AMM 21-51-00. NO FAULT ON #2 CONTROLLER. #1 CONTROLLER ON BIT AND PREV FLT SHOWED TCV THIS PACK. TCV LIGHT WENT OUT ON VERIFY. RAN PACK 10 MINUTES. PACK LT NEVER CAME ON. OPS CHECK GOOD REF B737-800 FIM 21-53 TASK 803.