I have a two story home. As such, it's always hotter on the second floor than the first floor.
As advised by many articles and how-to videos out there, I usually close the dampers in the ducts leading to the first floor in the summer, so that the cold air from the air conditioner is forced to the upstairs vents and then sinks down to the lower level, and vice versa in the winter so the warm air rises.
I'm trying to get a straight answer on whether this is ok or bad. I've now seen many other articles that suggest you should always leave all dampers and vents open all the time because you could cause damage to your furnace by creating unexpected blockages.
But most of those articles seem to be focused around the idea of closing off airflow to a room in order to save on energy costs. That is not my goal. I'm not closing off any rooms by shutting doors or anything. I just want the air to start in one spot and naturally move up or down in order to maintain an even temperature throughout the house.
So should I be able to adjust those dampers and registers? Or should I be concerned that it will damage my furnace?
FYI, the house was a new build in 2012, with a high efficiency furnace and AC unit.
Even with the air filter out, it was still shutting off. Had a friend in the HVAC industry take a look. I wasn't there at the time, but according to my wife, he suggested that the furnace is too big for my house and that my duct work is smaller than it should be. So it was having trouble carrying the heated air away from the burners fast enough (which
She said that he turned down the gas valve a bit and increased the air flow (not sure how). Been a couple days and it hasn't shut off yet.