Murphy’s law is an old adage that states “anything that can go wrong, will go wrong” and when it comes to your furnace, you should probably add “on the coldest day of the year”. So, you should not be surprised if your furnace stops working when you really need it. If this uncomfortable and undesirable situation happens to you, there are a few key things to check that may help you get it back up and running.
Check the power switch, fuse, or circuit breaker
This may sound like an obvious step, but it is easily missed when you are worried about keeping your home warm. If your furnace has a main power switch, check to make sure it is in the ‘ON’ position, if it is, take a look at the fuse box to make sure a fuse or circuit hasn’t been tripped.
Check your thermostat
Your thermostat is an extremely important component of heating your home. It is responsible for turning your furnace on when your home’s internal temperature falls below your desired setting. Therefore, when your thermostat is not functioning properly, it should be expected that your furnace will also not function optimally. Check your thermostat’s batteries (if it is battery powered), if they are fine, run a few tests by m annually turning on your heat or by increasing the set temperature to well above your home’s current temperature to see if your furnace kicks in.
Replace or clean your furnace filters
Dirty or poorly maintained furnace filters are a common cause of furnace issues. When your filter is blocked with debris, it makes it harder for your furnace to receive air, this causes a reduction in efficiency and can cause it not blow as much warm air through your home as it previously did. If your filter is the issue, your furnace should still fire up, but not warm your home properly. Your furnace filters should be replaced regularly (roughly every 3 months), if you notice your furnace filter is dirty you should replace it with a new, clean filter right away.
Check your air ducts
If your furnace is producing hot air but there are still cold spots in your home, this issue may be with your air ducts, and may be the source of your issue, not the furnace itself. Look at the dampers inside your ducts as well as the flaps on your register to ensure they are open.
Hire a professional
If none of the above potential issues are causing your furnace issues, it is time to call a furnace repair professional. A trained professional will be able to diagnose the issue and get your furnace back up and running so that you don’t need to worry about keeping your home warm.