When the pot is clean, the ignitor may not have enough pellets to light before it turns off (it's only on for a few minutes, by design). Easy thing to do it throw a handful of pellets in the pot and it will start up normally
I dont have a CB yet (one is coming) so I'd call CS and ask them. I haven't heard of this issue and it's new enough, not sure how many users we have who can help. Quickest answer is to just call.
p.s. I delete the other two duplicate posts. This is the right forum to put it. Multiple places only confuses the issue as people wouldn't know which one to respond too