As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT REPORTED SMOKE IN THE COCKPIT AFTER TURNING THE HEATER ON, WHICH DISSIPATED AFTER THE HEATER WAS TURNED OFF. MAINTENANCE INSPECTED AND FOUND THE HEATER BLOWER INOPERATIVE. THIS WAS REMOVED AND REPLACED WITH NO FURTHER DEFECTS NOTED.