That happened to mine after I used it a few times. The first few times it shut off after 10 seconds or so. Now, I have have to hit cancel when it seems done.

I'd take it back if I were you. Since I don't use mine very often, I don't care.

Hate to point this out, but are you lining the bag up in the right area, i.e. the channel? If the opening of the bag is "further into" the machine and is overshooting the vacuum area, it will run forever...

I HAD THE SAME PROBLEM!! BUT IT WAS USER-ERROR.

Turns out I had the tubes for the cannister plugged into the machine (just dangling there) and the FS didn't know which one I was using (bag or cannister).

Is that your problem?

PS: Calling FS is a waste of time. They are not knowledgeable about the products.

Good morning,
I did what 'joe_..' advised and it worked! The bag must have had a crease in the opening or something and wasn't completely flat. Works like a charm!
Thanks everyone!

Glad it worked out for you...

P.S. It's OK to say Joe Blowe!

;-)