If your blower fan is not working properly, you may need to reset it. There are a few ways to do this, depending on the type of fan you have.
If you have a ceiling fan, the first thing you should check is the circuit breaker. If the breaker has tripped, simply flip it back on and see if the fan starts working again. If the breaker trips again, there may be a problem with the wiring or the fan itself and you should call an electrician.
If your blower fan is portable or mounted on the wall, unplug it from the outlet and plug it back in again. This should reset any internal switches and get your fan running again.
Another way to reset a blower fan is to disconnect and then reconnect the power supply. For ceiling fans, this means turning off the power at the fuse box or circuit breaker panel. For portable or wall-mounted fans, simply unplugging it from the outlet will do the trick. Once disconnected, wait a minute or two before reconnecting everything so that any residual charge can dissipate. This will help prevent any damage to sensitive electronic components within your blower fan.