I've run mine with several different pressures and had great results at those levels. If it's not something in the torch blocking the flow, then it's a defective torch. In which case I know Beth will take care of it in a timely manner. All you have to do is call and tell them what is going on. They'll fix you right up.
Karin, I wish I would have known about your issues before you sold it. I think you'd be really happy with one that runs right.
I know I am.