As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A NUMBER ONE PITOT HEAT FAIL WARNING MESSAGE ILLUMINATED, DURING THE TAXI PRIOR TO TAKEOFF. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND REPLACED THE NUMBER ONE PITOT PROBE, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 34-11-04. OPERATIONAL CHECKS WERE SATISFACTORY, AND THE AIRCRAFT WAS RELEASED FROM MAINTENANCE.