As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL - ZONE TEMP LIGHT FOR CONT CAB ILLUMINATES AND CLEARS WHEN MASTER CAUTION IN RESET. GROUNDED - YES. RELEASED PER MEL 21-21F CONT CAB ZONE TEMP PRIMARY/BACKUP INOP. INTERROGATED THE PFTC. FOUND NO FAULTS. ACCOMPLISHED PFTC BITE CHECK REFB737-900 FIM TASK 21-62 TASK 801. NO FAULTS LOGGED. NO HISTORY PAST 30 DAYS. MEL 21-21F CLEARED.