As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT CAME ON AFTER PUSH BACK, WENT OUT AFTER RESET WAS PUSHED. ACFT GROUNDED. FLIGHT DECK ZONE TEMP ILLUMINATED WITH FAULT 21-51311. KNOWN NUISANCE FAULT REF 737NG-FTD-21-16001. ACCOMPLISHED FIM 21-62, TASK 801. OPS CHECK NORMAL. NO DEFECTS NOTED.