...shuts off intermittently when opening the hopper to fill it. Has happened twice in the last few days. First time it started right back up almost immediately. Second time it had a hard time getting going but finally did. All of this occurring while the lid is still open. Blower is like new clean. Weekly cleanings. Blower supposedly has nothing to do with the hopper safety switch. It's supposed to run regardless. Any ideas? Stove is 11 months old and starting to act like it's 11 years old.