Maybe this link can help you troubleshoot....
http://bryantrv.com/docs2/docs/hflamefurn04.pdf
LED Green ON...all good
LED GREEN OFF----Limit switch, Sail switch or 5A fuse on board
LED RED ...gas valve open
You can try to apply 12V directly to blower to make sure it turns. You can also confirm that you have 12V coming from the board to the blower.