When the Alberta winter hits hard, a working furnace isn’t just a comfort—it’s a necessity. For homeowners in Calgary and Lethbridge, a furnace failure can quickly turn into a stressful emergency. At Harmony Heating & Air Conditioning Inc.,  we understand how urgent these situations are, and our certified technicians are ready to respond with fast, reliable furnace repair services  in Calgary. But what causes furnaces to fail in the first place? And how do professionals fix t