As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE FROM PIT TO AZO, THE CREW RECEIVED A LEFT HAND PROPELLER HEAT FAIL CAS MESSAGE. FLIGHT 4169 DIVERTED TO DAY WHERE MAINTENANCE OHMED THE DE-ICE BOOTS AND CLEANED THE BRUSH BLOCK IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 61-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.