As a longtime homeowner in Northern Virginia, I’ve learned that our ever‑changing seasons can push heat pumps and furnaces to their limits. In this guide, I share personal insights on why heat pumps may run nonstop in cold weather, how to spot early signs of problems like icing or water leaks, and what to do when a furnace won’t start or keeps tripping safety controls. You’ll learn when a repair might be a quick fix versus a sign that replacement makes more sense, how long typical repairs take, and how to weigh age, repair costs and efficiency when deciding to upgrade. I also outline practical preventive care—like regular filter changes, professional tune‑ups, and simple home habits—to keep your HVAC system running safely and efficiently. Whether you’re in Fairfax, Loudoun, Prince William or Arlington County, this excerpt offers an owner’s perspective on keeping your heat pump or furnace healthy and understanding when it’s time to call in a pro.