i have a 5 year old Harman P68, it is in my shop and I rarely use it. Only put 2/3 of a ton through it. On July 5th I began to smell smoke, thought it was wildfires. I have not used this stove since early March. On July 16th, noticed creosote leaking from door of stove. Opened the door and major smoke. The entire firebox was full on black pellets, the waste can stuffed with black pellets. The burn box was hot. The switches of the stove were OFF. Somehow, it turned itself on, but very low feed rate???? It fed about 50lbs of pellets. I have a call onto service to find out what happened. I unplugged it and left it as I found it. This is just bizarre.