you can look at the normal things
1 filter ie is water going out quick enough
2 load only washing for 1 person may mean the loads get out of balance more easily and machine will not spin. try with nothing in
3 i dont know with bush but is there either a knob to vary the spin speed or a button to turn off the spin? Lost track how many times have been called out to machine only to find the spin turned off normally by grand kids