What was found
DURING AFTER START CHECKLIST WHEN RECALL PUSHED THE AIR COND AND CABIN ZONE TEMP LIGHTS ILLUMINATED. LIGHTS EXTINGUISHED WHEN MASTER CAUTION RESET. CHECKLIST COMPLETED. GROUNDED - YES. BITE CKD BOTH PTC #2 ON BIT & PREV FLT FLT DECK TRIM VALVE FAULTED WITH A GREEN ON GO/VERIFY. RESET AND RAN BOTH PACKS, REACCOMPLISHED BITE OF BOTH CONTROLLERS WITH NO FURTHER FAULTS REF B737-800 FIM 21-62 TASK 801 ALL OPS CKD NML.