As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB-ZONE TEMP LIGHT ILLUMINATES ON RECALL AND EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED-YES. PER B737-800 FIM 21-62 TASK 842 PZTC NR 2 SHOWED RED LIGHT FOR FLIGHT DECK TRIM VALVE. AFTER RESET PERFORMED BITE TEST ON PZTC NR 1 AND 2, NO FAULTS NOTED. GROUND VERIFICATION PERFORMED.