creda tumble dryer capacitor for motor failed again?

Six months ago my creda T602cw tumble dryer motor was trying to start,but could not if you turned the drum by hand
(side of machine off) it started ok,but would not start again if it had to stop or reverse.Called out man to fix he canged 7uf capacitor said it kick starts motor. Last week same fault changed capacitor myself using correct one only lasted a week same fault again any ideas.

Thanks for any help