The below is a link to a great website. The Burning Secrets sections are very educational, at least to homeowners like me. It includes a lot on woodstoves, with sections on problems and trouble shooting. I got good info about my touchy bypass damper here where the handle turns but sometimes the damper does not move. It also has good info on exploding glass doors.
http://www.chimneys.com/burning_secrets/index.html
http://www.chimneys.com/burning_secrets/index.html