Our stove is what we use to heat our small house. lately its been giving us problems. Auger squeeling (fixed that) Fan mode only seems to work on high. But now the heat output seems low and its chilly. I've got the feed rate on 5 and the heat output hasn't increased at all. I'm worried......I've cleaned it out like I do every 3-4 days. I've tried calling for service but no one has returned my calls. I've called 4 different service shops.