Review on WindTunnel Upright 303173001 Cartridge 303172002 by Janet Tijerina

The washable foam filter was perfect and fit like a glove, just like the OEM it replaced. The hepa filter and mount are a different matter. When vacuuming it was thrown out again and again. So I decided to look at it logically and fix it. Underneath the filter bracket/holder are two rectangular plastic squares that attach to the front and back of the filter bracket/holder. Since it had small protrusions I decided they were too small to hook and hold it in the vacuum assembly. So I untied each rectangular square at the front attachment point (leaving it attached at the rear attachment point). Front refers to the mounting points closest to the front of the machine. After the attachment points are cut out, position them so that they hang down a bit. When you have achieved this and put the filter holder/holder back into the machine your now slightly hanging rectangular pieces will secure the filter in the machine. The problem is solved. I'll try to post pictures, but I hope it's as easy for you as it seemed to me.