The ceiling fan should rotate at very high speeds with minimum noise. Do you want to avoid the risk of your ceiling fan shooting sparks all over your bed. However, if the noise level is slowly but steadily increasing, it is obvious that the moving parts that ought to be well lubricated and well oiled are not so. The sparks will occur only when the moving parts collide at such high speed that.

If you discover that the fan operates at half power when you are trying to make it run at full speed, it is obvious that the power generated by the motor is being lost due to the resistance. Hence, it is a clear indication that you need to maintain your ceiling fan immediately. However, such an instance is not going to happen unless you miss certain very obvious warning signs. Lack of lubrication takes place only over a period of time with lack of maintenance.

Secondly, the lack of lubrication is obviously going to lead to more friction and is going to reduce the efficiency of the device.

The first and the most obvious warning sign that your fan will emit when it is in need of maintains is the change in the speed or functioning and the increase in the noise factor.