What was found
DURING CRUISE FLIGHT, PILOT NOTED AN FAINT ELECTRICAL SMOKE ODOR. DETECTED IN THE CABIN AS WELL. TURNED BACK TO BASE. THE CREW IN THE BACK TRACED THE ODOR TO THE OVERHEAD PANEL THAT HOUSES THE AUTO TEMP SENSOR. THE PILOT THEN TURNED OFF THE AUTO TEMP MODE AND SELECTED MANUAL. IN JUST A FEW MINUTES THE SMOKE ODOR WAS GONE. ON LANDING, MAINTENANCE CHECKED OUT THE PLANE AND FOUND THE CIRCUIT BOARD AND FAN FOR THE TEMP SENSOR TO BE THE CAUSE OF THE ELECTRICAL SMOKE ODOR. PART WAS REMOVED AND AUTO TEMP SYSTEM WAS PUT ON AN MEL. OPERATIONAL CHECKS WERE GOOD AND AIRCRAFT WAS RETURNED SERVICE.