As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROLLER CABIN ZONE TEMP AMBER LIGHT CAME ON AFTER RECALL. AFTER ENGINE START LIGHT GOES OUT ON RESET. ACFT GROUNDED. ACCOMPLISHED PACK TEMPERATURE CONTROL BITE IAW FIM 21-62, TASK 801. NO DEFECTS NOTED. SUSPECT NUISANCE FAULT REF FTD 737NG-FTD-21-16001. DEFECT CLEARED.