Heat Moves to Heat Exchanger
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.
If your gas valve is working fine, but the furnace isn't turning on, check to make sure your pilot light is on. For instructions on relighting the pilot light, refer to your manufacturer instructions or contact a professional.
In order to maintain an efficient furnace, annual professional maintenance is not a suggestion—it's a requirement. AFUE will decline over the years due to ductwork leaks and inefficiencies, dirty furnace components, loose and damaged parts, and clogged air filters.
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