As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT THE FLIGHT CREW TURNED ON THE CABIN/COCKPIT HEAT. THE CREW HAD SMOKE IN THE COCKPIT. THE CREW THEN SELECTED THE TEMP CONTROLLER TO COLD AND TURNED THE HEAT OFF. THE SMOKE IN THE COCKPIT CLEARED OUT. TROUBLESHOOTING IS CURRENTLY IN WORK.