Noisy Ideal Elan RS 60 Boiler?

Hi all, I have an Ideal Elan RS 60 Boiler. It sounds as if the fan bearings are worn and the fan is fouling the cowling. I know it dosn't have a fan. After reading the coments on this websit I am still not sure if it is the P C B board at fault or not. Can you help?

Many thanks

J Smith