As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA REPORTS NO SIDE WALL LIGHTS THROUGHOUT CABIN CABIN TEMP WAS OVERHEATING EARLIER WITH AIRCRAFT ON GATE AND NO PACKS RUNNING, MAINTENACE PUT CABIN TEMP CONTROLS INTO HEAT REDUCTION MODE. RETURNED CABIN TEMP CONTROLS TO NORMAL OPERATION, CABIN LIGHTING NOW NORMAL