Hi SallySmoker;
Try calling customer support during usual business hours, M-F. For awhile they were way behind in answering, but hopefully that problem has been resolved by now. If Bradley gave you a email address at the end of the message of the answering machine also send them an email.
I don't have the digital, and as you noted they have changed the design. I read one post that the fuse is now located inside the generator. You may have a faulty generator, but with two generators going out on you, you may want to check if the problem isn't something else. If you have a computer power cord, plug the smoke cabinet (oven) directly into a wall socket. If the element doesn't heat up, the problem may be either a bad temperature sensor, or possibly a blown inline fuse.