As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO SAV, THE FLIGHT EXPERIENCED A RH WINDSHEILD HEAT CAUTION MESSAGE. AFTER FOLLOWING THE QRH, THE MESSAGE PERSISTED. THE FLIGHT COULD NOT CONTINUE TO SAV DUE TO ICING CONDITIONS, DIVERTED TO DAY FOR REPAIR. AIRCRAFT REMOVED FROM SERVICE TROUBLESHOT AND REMOVED AND RPELACED RHJ WINDSHIELD TEMP CONTROLLER IA W AMM 30-41-01. OPS CHECK GOOD.