I have a Summer's Heat 55-SHP10 that was installed July 2011. The first two winters it ran just fine, was cleaned routinely as directed. This season has been exasperating to say the least. It just shuts down after running sometimes 10 minutes and other times after several hours. I have installed a new combustion blower and vacuum hoses but hasn't solved the problem. The control board isn't showing any E codes either. Next step is replacing auger motor you think? This is getting expensive and would be great if there was a quick and easy solution I am overlooking.