I am new to having a pellet stove. I rent and had not direction on how to use the stove. I have a King Pellet stove 5500m. I have cleaned out the stove as shown on youtube and cleaned out the exhaust pipe going out of the house. Does any one have any ideas how to resolve the issue of smoke and fire coming out the fresh air intake. It does not have an OAK installed. Would installing and OAK fix the issue or is it something more?