A good furnace can easily last 20-30 years if it’s well looked after.

That doesn’t mean you won’t have some issues along the way. What can cause a furnace to stop working? Unfortunately, it could be one of a number of issues. 

If you find that your furnace isn’t working, there are some troubleshooting steps you can follow to try to solve the problem.

Read on to learn what to do if you have issues with your furnace not working.

Check Your Thermostat

If you find that the furnace is not kicking on when the temperature drops, the first thing to check is your thermostat settings. If your furnace isn’t coming on, it may be because your thermostat isn’t requesting any heat. 

Check that the thermostat is set to an appropriate temperature. Try turning the temperature up to five degrees above the current room temperature. If everything is working ok, the furnace should kick in. If the furnace is not responding to the thermostat, check that the thermostat has power; this could be mains electricity or batteries.

Check Your Filter

Furnace filters are a vital part of your system.

They keep contaminants from entering your furnace and keeping things running smoothly. Eventually, though, they will get blocked up and need cleaning or replacing. If your filter is blocked, it may cause your furnace to work too hard or even stop entirely. 

Check your filter, and replace it if necessary then try your furnace again.

Is There Power?

Another common problem is a lack of power to your system.

This may be down to something as simple as the power switch of your system getting turned off. It may also be due to a fuse tripping, meaning there will be no power to your furnace until the fuse is reset. 

Make sure your system is receiving power, and if it still doesn’t work, then the issue lies elsewhere.

Check The Safety Switch

Another possible source of the problem is the safety switch.

This switch ensures that the fan and burner can’t power on whilst the access panel is removed. This is a useful safety feature, but your furnace won’t work if the switch has flipped. 

Make sure that the door is firmly in place and the switch is reset, and try your furnace again. You may need to replace the switch if this doesn’t work. 

Check The Flames

Another simple check you make is to take a look at the flames in your furnace.

They should be burning a clean blue. If your flames are yellow then it’s likely that your burners are dirty, with the contamination that your filters are trying to keep out.

The good news is that you may be able to give your burners a clean with a vacuum and get things up and running again. If this doesn’t work then you’ll likely need some maintenance work

Furnace Not Working Still? Call For Help

If you’ve tried any or all of the above and still have problems with your furnace not working then it’s time to call in the professionals.

We offer a range of heating installation, maintenance, and repair services in Pearland, TX, and beyond. We also offer AC installation, maintenance, and repair, and cover a number of locations in Texas, including Alvin, Clear Lake, Fresno, League City, Sugar Land, and beyond.

Contact us today to discuss your home comfort needs.