If you notice a funny burn smell when the heat turns on, it may be a sign that your furnace needs maintenance. It could be something as minor as a dirty filter, but it could also be a serious problem ...
A furnace filter should be changed about once every three months. A furnace filter should be changed more often in the event of pollen, construction dust, cold spells, or other amplifying factors.
Even in the warmer months of the year, you should regularly monitor your furnace filter's condition -- and replace it as needed -- to keep your family safe and your furnace in good working condition.
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