A furnace generates heat. That’s the basic job from when the first central heating furnaces were created hundreds of years ago. So when you turn on your furnace to provide your house with heat during a cold winter and the only air that comes out is cold—yes, you have a problem. There may be a simple solution to this, and we’ll look into that. Or you could have a serious problem that will require furnace repair in Andover, MA from professionals.
We’re going to go through some of the basic reasons for a furnace that isn’t heating and what you can do about them. Please, if in doubt, do not attempt to make any repairs on your own. Especially with a gas furnace, trying to open up the unit and “fixing” it is potentially dangerous. (And you probably wouldn’t be able to fix the problem anyway.)
If there was one fact about furnaces we’d love to permanently secure in everyone’s minds, it would be that the furnace’s filter needs to be changed for a clean filter every 1 to 3 months.
A reliable and powerful heating system is necessary to make it through one of our Boston winters. But proper home heating requires something more than just heating power. After all, a furnace that can heat up air to a comfortable 72°F isn’t much good if the heat doesn’t go anywhere. That’s why a central furnace has an air handler and a duct network. A problem that many homes face during winter with their heating is that heat isn’t reaching all the rooms evenly, leading to cold spots. 
Probably not.
Every fall, we make a big push with our customers and soon-to-be-customers to schedule maintenance for their heating systems. This isn’t something we do just so our technicians can keep busy during the crunch seasons of summer and winter. We do it because any HVAC company worth hiring recommends it, and so does the US Department of Energy. In over thirty years in business, we’ve seen the major benefits of routine heating maintenance. We’ll explain below what these benefits are so you’ll know not to miss a fall maintenance inspection and tune-up for your heating system. 
