My oil burner control safety trips and cuts off the the furnace about once a month. Resetting it by pushing the red button easily restarts the burner. There is a wisp of smoke expelled around the flame viewing cover plate so I assume that some oil was left in the combustion chamber from the previous failed start. Other than this problem, the furnace starts and runs smoothly. I suspect an electrical problem, but I don't have a furnace repair experience to suggest a specific problem. Can someone suggest a probable reason for this behavior?

When you have a once a month event good luck in finding the problem.It could be the oil supply,ignition,or safety device. I would be inclined to look hard at the safety device and or a intermittent electric problem. Also check for a dirty cad cell. It is the item that watches the flame.