As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE CO-PILOTS WINDSCREEN WAS PRODUCING RT-HAND WINDOW HEAT FAIL AND FAULT INDICATIONS. THE MAINTENANCE TEAM TROUBLESHOT AND DETERMINED THE ANTI-ICE CONTROLLER (P/N 90825-7 S/N 248) WAS DEFECTIVE. A SERVICEABLE CONTROLLER WAS INSTALLED AND OPERATIONAL CHECKS WERE COMPLETED WITH SATISFACTORY RESULTS. THE AIRCRAFT WAS RETURNED TO SERVICE.