A furnace is a crucial appliance in any home, especially during winter. It’s important to keep your furnace in good working order to prevent any unwanted surprises, like a broken down furnace on a cold day.

Thankfully, furnace maintenance is relatively easy, as long as you know what you’re doing. In this article, we’ll give you some tips on how to keep your furnace in tip-top shape.

By following these tips, you can be sure that your furnace will be up and running when you need it most.

Check Your Filter

The first step in maintaining your furnace is to check your filter. Make sure to take a look at your filter every few weeks and replace it if it is clogged or dirty. It’s important to regularly change your filter to keep your furnace working efficiently and to prolong its life. When replacing your filter, make sure to use the correct size and type. Check the size on the side of the filter or consult your furnace manual for more details. You should also periodically inspect the ducts and vents for any blockages or obstructions, as these can interfere with proper air flow.

Clean Your Flame Sensor

Over time, your flame sensor can get dirty or covered in dust or grime. This can impede the operation of your furnace, which is why it is important to clean this part regularly. You can clean it yourself with a wire brush and some rubbing alcohol. To do this, simply remove the flame sensor and then use the wire brush to remove any dirt or debris. Once it’s clean, apply a small amount of rubbing alcohol to the coil, reattach the flame sensor, and turn your furnace on to test it. If it’s still not working properly, it may be time to call a professional.

Test Your Thermostat

Your thermostat is the brain of your furnace and it is important to make sure it is in good working order. You can test the thermostat by turning your furnace to the “on” setting and then checking the temperature. If the temperature is too low or too high, then it may be time to either adjust the settings or replace the thermostat altogether. This is usually a relatively straightforward process and is something most DIYers can do, though you may want to consult a professional if you’re not sure what you’re doing.

Schedule an Annual Tune-Up

Even if you’re careful to check your filter and clean your flame sensor, it’s still a good idea to get your furnace serviced annually. A professional can look for any signs of damage or issues that you may have missed. This service will also help to maintain your furnace’s efficiency, which can help you save on energy costs. It’s a good idea to schedule a yearly service appointment so that any necessary repairs or adjustments can be taken care of before the cold winter months.

Don’t Ignore Strange Noises

If you notice any strange noises coming from your furnace, it’s important to address the issue immediately. Ignoring strange noises can lead to further damage and could even be a sign of more serious issues. Normally, strange noises can be fixed by addressing underlying issues, like improper installation or a clogged filter. However, it’s always best to consult a professional if the issue doesn’t seem to be getting any better.


Maintaining your furnace is a crucial part of keeping your home safe and comfortable. By following these tips for proper furnace maintenance, you can be sure that your furnace will be in good working order when you need it most. Remember to check your filter, clean the flame sensor, test your thermostat, schedule an annual tune-up, and don’t ignore strange noises. With these steps, you can help ensure that your furnace will work properly for years to come.