As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
190224/2 - LT WINDSHIELD HEAT CAUTION LIGHT ON EICAS AND WILL NOT RESET. RETURNED TO DEPARTURE. REMOVED AND REPLACED LT WINDSHIELD TEMP CONTROLLER IAW AMM 30-41 & PLACED LT WINDSHIELD ON BACKUP SENSOR IAW AMM 30-41. OPS CHECK GOOD. (K)