As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN ZONE TEMP LIGHT ILLUMINATES ON RECALL. GOES OUT ON MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED FIM 21-62 TASK 848. LIGHT DID NOT ILLUMINATE. PERFORMED BITE B737-800 FIM 21-62 TASK 801. NO FAULTS LOGGED. OPERATED PACK. NO ZONE TEMP LIGHT ILLUMINATED. FAULT IS INTERMITTENT, IAW FIM 21-62 TASK 842.