LOL...I used to work for Viking. I was making a project on the Designer Diamond and it took me a while to realize that the foot pedal was inching its way under the back of the sewing table as I sewed and perpetually staying in the "ON" position!...as though my foot were still on the pedal-which it was but only the front half!:) LOL It would probably be a good idea to have this issue evaluated by a licensed repair person...don't you think?/Lissa