Not much info here. Do you even have a coal stove or just a wood stove? Does it have a shaker grate? Is it air tight?
Hard coal needs the right stove.
its a vogelzang wood / coal stove with a blower and a draft blower. a rather large stove , it does wood well and that may be my problem as i’m use to wood. I can get the coal fired but it seems downhill from there . to much coal or to little? My main problem I think is i’m use to wood.