White wire is neutral. Take a look at ceiling fan capacitor connection wiring this color is not the same for all fan manufacturing company.

Red White Blue Fan Wiring Black Wire Wiring Diagram
What is the blue wire on a ceiling fan. Ceiling fan wire color code. The four ceiling fan wire colors and their functions include. The blue wire is the hot wire for the ceiling fan light fixture. It is the neutral wire. You can also have others with five or six wires depending on the task it is to perform. Without connecting the blue wire on your ceiling fan to a power source you will not be able to control your lights.
Wiring connections for this scenario ceiling electrical box wires ceiling fan wire black to black ceiling fan motor. The blue wire is for the ceiling fan light fixture. Ceiling fan capacitor connection internal wiring of a fan. The ceiling fan motor does not have a ground wire. Therefore we have the method to determine it with a digital multi meter. What is the blue wire on a ceiling fan.
Some of the most advanced ceiling fans today come with up to four wires. Black wire is for the fan. The blue wire on a ceiling fan is to control the power running to the light kit. The black wire is usually reserved for fan power only and does not extend over to your light kit. Blue wire is for the light if light is included with the fan. Look the capacitor connection how the color of wire is used in fans output.
Find the short green wire or the green ground screw on your ceiling fan hanging. Green wire is for the ground.