Buzzing from the blower fan

[esox]

Hi all,
Just aquired my 1990 k10 1.0L Micra. I used the blower today on setting 1&2 and it buzz's like a Cricket (Insect) any ideas were to start ?

Thanks

 

[pollyp]

take the fan blower unit out to inspect for obstruction. its behind the glovebox underneath.

 

[esox]

Thanks guys now sorted......Leaves in fan section.