As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING AFTER START FLAPS, RECEIVED A MASTER CAUTION WITH WINDOW HEAT OVERHEAT ANNUNCIATED. ACFT GROUNDED. SWITCHED THE LT FRONT WINDOW SENSOR TO THE SPARE POSITION. LEFT WINDOW HEAT SYS, OPS CHECKS GOOD, REF MM TASK 30-41-00-71-801. GROUND VERIFICATION CHECKS NORMAL.