Ok hopefully someone can help me I have a 2002 englander 25 pdv gave her a good cleaning about 10 days ago took everything apart exhaust blower etc. I also modified my burn pot which has worked amazing no more ash build up or clinkers. Now every now and then I get a helicopter sound coming from the stove besides this it works flawless..... Way better than it ever has burned do to the modification to the burn pot.... I'm guessing it would be something with the oak maybe I'm getting to much air in now and need to block off some air coming in??