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 AFTER START EXTINGUISHES WITH MSTR CAUTION RESET. GROUNDED - YES. FLT DECK TEMP CONTROL SYSTEM PRIMARY INOP. PERFORMED B737-800 FIM 21-62 TASK 833 STEP E INITIAL EVALUATION. BITE PASSED. CONT CAB ZONE TEMP LIGHT REMAINS EXTINGUISHED ON RECALL.