Hi.. new to this site, but hope someone can help.. I purchased a Harmon coal stove and had it installed by a reputable dealer.. all I know from a neighbor who got me onto the idea of buying this to increase the affordability of heating my large home.. It starts off well, get a good hot fire going and then after a few hours, goes out during the night.. I shake the shaker, add a bit more coal, and then have trouble getting the fire to stay lit.. either burns too fast, or goes out.. it's been three years and I'm so disgusted... can't understand how my neighbor only shakes the shaker twice a day, as I have a bed of white ashes too thick, and when I shake, there isn't enough fire to keep it going.. the dealer told me to burn the wood I had, and just keep adding wood and alternating wood and coal.. sure this isn't right.. now I am wondering if it was installed in my fireplace correctly.. they cut my damper knob off. and just use the dial on the front of the stove to add or close off air.. in very small turns, and the fire still goes out.. can anyone please tell me what to do.. Nice if I could get this thing to work correctly.. It takes me at least two hours to get it going good, and by dinner at night, it's ready to start all over again.. do I have too much draft, or not enough? Help!!!!