We moved into a home a year ago. We have an Ember Hearth Wood Stove in the basement. We did not use it until we had a chimney inspection. The inspector told me not to close or open the flute because it sticks. We use this to heat our home since we have a propane tank and someone caused propane to shoot up in price. We just tried to have a fire started in it and smoke filled the basement. We have had many since it was inspected but this one filled the basement. How do I know if the flute is open and how do I open or close it?