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Before cold weather settles into St. Charles, your furnace deserves more than a quick test at the thermostat. A system that turns on today may still have a dirty filter, an ignition problem, or an airflow issue that needs attention before winter.

So, what does a furnace tune-up include? A professional visit typically involves inspecting the equipment, cleaning serviceable components, checking operation, and explaining any concerns. The exact work depends on your furnace and the service package. Here is how to understand the appointment and get more value from it.