Newbie to Smoke King and smoke cooking. We live on the Oregon coast and are newly retired. We just bought a Smoke Chef pellet smoker grill from BiMart $259 model PS 2615, 500 sq.in.grill. We are having trouble getting it to stay at 250 degrees to smoke a roast,using Apple and Hickory hardwood pellets. The first hour it turned the heat down to 80, when it was set at 250, tried for 2 more hours, same thing. It starts out great, nice and hot, but when we go inside, it slowly goes cold again.Can't find a web site for Smoke Chef, but some research shows it may actually be a Smoke Hollow product?? Anybody have an idea for us?