I have a 10 year old Harman Accentra FS that I bought used last year. It worked flawlessly my first winter, but I now am experiencing a problem with the auger and/or feed rate. When the stove is running on high, the feed rate and auger work properly. I get a nice flame height and great heat. When I switch the stove to low, however, the flame gets extremely low. So low, in fact, it backs up into the auger tube area. This has caused a very squeaky auger because (i'm assuming) carbon build up. The auger has now started having problems even turning on occasion, accompanied by a very loud screetch sound that mimics a squirrel going into a wood chipper (not the same sound as the notorious tuning fork squeal). Whenever the stove is on low (room temp or stove temp, auto or manual) I can't keep the fire to the front of the burn pot. It always backs down towards the auger tube. Even if I jack the feed rate to "6", the pellets are not feeding any quicker. The fire is barely there and the pellets are burning before they are even dispensed through the auger opening. Please help. I can't run the stove on high all the time or else I'll heat myself out of the house. Anyone have any thoughts? I'm open to suggestions on room vs stove, auto vs manual, and how to get the feed rate to actually pump out pellets. I've read the Harman sticky, but can't seem to fix this issue.