The Stove was in the house when we bought it. It worked great for a while, Thanksgiving we lost power for 3 days. now the stove runs and puts out heat but not like it used to. Any heat setting over 5 the pellet consumption is the same and heat output does not change. it is putting out a lot of heat but steadily goes down over 8 hrs until just blowing warm air not hot despite a nice fire burning inside. 3 magic buttons are 6-4-1. This stove is a 2005 so does the a-b-c-d modes exist.