As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED STALL HEATER FAILED DURING RUN-UP. MAINTENANCE INSPECTED AND FOUND THE LIFT TRANSDUCER HEATING ELEMENT SWITCH AND CONNECTOR MELTED. BOTH THE SWITCH AND THE SWITCH CONNECTOR WERE REPLACED WITH NO FURTHER DEFECTS. PART NUMBERS REPLACED WERE 30-16-0687001 AND 16-705-103-13.