Fireplaces, Heating Stoves, Flues and Chimneys - Harman Pellet Stove-Need Troubleshooting Advice

I Have a Harman Pellet stove and it is a bottom auger feeder with a big burning pot and the pellets are fed in from the bottom of the pot. When I try and start it up it lights just fine but, the timing for feeding is screwed. It takes about a minute or more to feed each time and no matter what I do to try and adjust the timing, it won't. Than after a couple of minutes the auger switches into a constant feed mode. The fire gets to big the pipe gets too hot & because of this I don't even use it, I can't trust it. Can anyone give me any tips of any kind. If I can't figure it out I will be buying a wood stove.