I'm a newbie and this is my first winter with my Napoleon Epic Oakdale wood-burning fireplace insert. The fan to circulate the air has stopped working. I plan on investigating the problem this weekend, but I suspect it may have more to do with my cleaning habits of the fireplace than an actual electrical failure. I've ordered an ash vacuum cleaner to use instead of my shop vac. What else should I be doing regularly to keep the fan in working order? Thanks.