Kärcher A2534 Pt 1600 Watt Diy Multi-purpose Vacuums

Marvellous machine works well with my workshop tools, only gripe was finding a part loose when unpacking, couldn't find where it was from so asked a Karcher expert, discribed the part & was told it was from the suction pipe but after an hour found it...

I used this for the first time today, and tried to clear up small debris from drilling, little nuggets of stone and grit, and of course dust. After 5 mins the vac wouldn't suck up anything. I banged the filter clean but no way was it going to suck...