As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE RETURN LEG HOME I TURNED ON THE FAN TO MOVE SOME AIR AROUND IN THE COCKPIT. AFTER APPROXIMATELY 10 MINUTES I SMELLED A "HOT" ELECTRICAL SMELL COMING FROM THE AIR VENTS. I TURNED THE FAN OFF AND THE SMELL DISSIPATED. I LANDED THE AIRCRAFT BACK AT BASE WITH NO FURTHER INCIDENT.