As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CABIN ZONE TEMP LT ON RECALL/EXTINGUISHES WITH RESET. GROUNDED - YES. CONTROL CABIN ZONE TEMP PRIMARY INOP. PERFORMED PACK TEMP CONTROL BITE. BITE PASSED. REF B737-900 FIM 21-62 TASK 801. CONT CABIN ZONE TEMP LT REMAINS EXTINGUISHED ON RECALL.