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 ILLUMINATED ON RECALL AND WAS RESETTABLE. GROUNDED - YES. INITIAL EVALUATION, HAD ZONE TEMP LIGHT ILLUMINATED ON RECALL. PERFORMED PACK TEMP CONTROL BITE PROCEDURE FOLLOWING B737-900 FIM 21-62 TASK 842. PREVIOUS FLT HAD FLT DECK TRIM VALVE LIGHT ILLUMINATED, WHICH CLEARED ON VERIFY. RE-RAN BITE CHECK AFTER OPERATING BOTH PACKS 5-10 MINS EA. NO FAULTS FOUND.