. When it comes to your home’s comfort, your furnace works hard behind the scenes — all day, all night, and all winter long. But like any piece of equipment, it needs regular maintenance to keep it running safely, efficiently, and reliably. And here’s the truth: every furnace needs yearly maintenance — even brand-new ones. 1. Maintenance Keeps Your Warranty Valid Most manufacturers require annual professional furnace maintenance to keep the warranty active. If something brea