Blower fan on 1997 BMW 528i

My blower fan has been going in and out of high to low for the last month. And now the fan want even blow anything, hot or cold. What needs to be fixed?

Asked by for the 1997 BMW 528i
Hello you need to have a diagnostic performed at a qualifed repair center.This system is controled by the final stage blower resitor,final stage blower module both of which is located on the pass.side under the dash board.This system also have a prblem with the climate control head.HAVE A BLESS DAY from DR.RECO.

P.S.Our repair center is located in Pittsburg,Ca.