The furnace damper should be open in winter to ensure efficient heating.
There should be a lever somewhere on the duct near the furnace. If it is open, the lever will be parallel to the duct. If the damper is closed, it will be perpendicular to the duct.
Damper
If the furnace itself is in the attic, the humming is likely caused by electrical components in the furnace--most likely, the blower motor, or else a transformer or relay coil. If the furnace is located elsewhere, the humming may be caused by a damper motor or possibly the air movement itself vibrating a damper or some sheet metal.The HVAC Veteran
To open a fireplace damper, locate the handle or lever usually located inside the fireplace or on the chimney. Pull or push the handle to open the damper fully, allowing for proper ventilation and airflow in the fireplace.
The purpose of a furnace damper is to control the flow of air and heat in a heating system. By adjusting the damper, the amount of heat that is released into the home can be regulated. This can help improve the efficiency of the heating system by ensuring that the right amount of heat is being distributed, reducing energy waste and improving overall performance.
On mine if you turn the nob clockwise, that openes the damper. If you trun the now counter clockwise that closes the damper. Yours may be different. Let me think. Did you have anything in your stocking this morning?
The HVAC damper in the current system is closed.
What is open rollout mean on goodman furnace?
A top damper or cap damper is a metal spring door placed at the top of the chimney with a long metal chain that allows one to open and close the damper from the fire place.
Shut and Open
When you use the fireplace, the damper should be open all the way. If not, you probably will not get enough updraft and your house will fill up with smoke...not a good thing. When it is not in use, the damper should be closed...otherwise you will lose a lot of heat up the chimney.