I’m in a pretty cold state. It’s been below zero F quite often this winter. My furnace has not been keeping up and my house has gotten pretty cold. I got some space heaters to supplement.
Furnace is about eight years old.
But I started to think that I’ve never had this problem in past winters. Maybe furnace needs a tune up? I always keep a clean filter and air volume from vents was fine. All gas jet thingies were fired up and looked fine.
So I started thinking that this past summer I switched my system to always ON because I thought maybe constantly circulating the AC on the house would keep the temp low with less energy. Plus I didn’t like the system turning on and off when I was trying to fall asleep.
This is a 100 year old house with no insulation. I retrofit the central AC and heat in 8 years ago.
So I’m trying to figure out why the heat won’t keep up and I decide to switch the system to Auto. We had a really cold night and it kept up just fine. The house is hot now!
Is this normal? If not is it indicative of a problem?