Why Your Furnace is Blowing Cold Air
A furnace blowing cold air is not only a nuisance, but a danger to your home's pipes, electronic components, and home comfort. Here are the four main reasons why:
Fuel
The air in your furnace is heated by fuel. If there are compromises within the component, air will still blow, it just won't be hot. (Electricity is also considered part of the fuel source since it runs the entire system.)
Possible issues within the fuel sources that will cause cold air to blow: Empty oil tan