When switched on the fan makes a whirring noise. The noise is not present if the light is also on at the same time. Why? How can the problem be eliminated?

When on the fan makes a whirring sound. The noise disappears if the light is also on. Why? What needs to be done to eliminate the noise?

I have a HB remote control fan, model 48-TP. Ichanged the batteries one day and it decided not to work for 3 months. Can anyone help me.

To be clear, the fan only makes a noise if the light is also on?

Is it a remote fan?

General ceiling fan troubleshooting and help FAQ- Ceiling Fans N More

Have you checked the dip switches?

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More