Why is the heater blowing cold air? Let's fix it.
There is nothing quite like that sudden realization that you're shivering in your own living room, leading you to wonder why is the heater blowing cold air when the thermostat is clearly set to 72 degrees. It's one of those minor household heart attacks that usually happens on the coldest night of the year. Before you start looking up the cost of a brand-new furnace or preparing to hibernate under five layers of wool blankets, take a deep breath. ...