Replace the furnace filter at least once every 90 days (set reminders to check the filter every month). Write the date of replacement on the filter itself so you know exactly how long it has been since the last filter change-out.
You may also have an issue with your thermocouple or thermopile, which helps detect whether your pilot light is on or not. Your thermocouple is an essential safety device that makes sure your gas valve is not sending gas into a furnace without a working pilot light.
Welcome to Furnace 101, where we teach you the basics of your furnace and how it works to provide heating to your home.
Periodically check the furnace flame color and characteristics (about every month or so when you check the filter). The furnace flame should be blue with perhaps a small yellow tip. Any other color (red, orange, green, etc.) indicates a fuel/burner problem. Contact a professional to fix the flame color. Do not try to fix it yourself.
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