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Furnace tune-up cost doesn't tell you what you actually got. This guide breaks down the 5 categories a real tune-up must cover, heat exchanger inspection, a combustion and CO test with real numbers, blower motor checks under load, ignition and flame sensor testing, and airflow calibration, plus the exact questions to ask a technician to confirm each one actually happened.

A single furnace tune-up and an annual maintenance plan are priced completely differently, which is why yearly furnace maintenance cost figures online seem to contradict each other. This guide breaks down real pricing for each option, what actually drives the price up or down, and how to avoid the bait-priced inspection ads that lead to inflated upsells.