As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4311 - AFTER TAKEOFF FROM BOS, CREW RECEIVED A RIGHT WINDSHIELD HEAT FAILURE WARNING. ICE STARTED TO FORM ON RIGHT WINDSHIELD SO AIRCRAFT RETURNED TO BOS AND LANDED WITHOUT INCIDENT. MAINTENANCE CLEANED WINDSHIELD HEAT CONTROL BOX CONNECTOR AND TESTED SYSTEM. ALL CHECKED GOOD. AIRCRAFT WAS RETURNED TO SERVICE. (X)