You start a fire in the fireplace, huddle under a warm blanket with a cup of hot cocoa in your hand, reach over to grab your favorite book and everything goes dark. Your furnace clicked on and blew a fuse yet again. Why does this happen? There are a number of reasons why a furnace blows fuses and Vredevoogd Heating & Cooling offers up the following.
Electrical Short or Strain
A fuse blows when there is an electrical short in your system or an appliance places too much strain on it. Furnaces use a lot of electricity, and if your home doesn’t have the proper circuitry to support it, the heater is going to blow the system. If your furnace keeps blowing a fuse, even after you’ve replaced it, you need a professional to check your system for shorts and strain.
It could also be that the fuse for the outlet in which your furnace is plugged isn’t the right size. A fuse too small will not be able to handle wattage that goes beyond its threshold. Instead of starting a fire, the fuse will shut down – or blow, as most people say. You can replace the fuse with a larger one but make certain your system can handle it; otherwise, you face fire danger.
The problem may also be the transformer. If it’s malfunctioning in any way, your fuses will not hold electrical currents. This isn’t a do-it-yourself fix, as it’s never wise to play with electricity unless you’re trained properly to do so. An electrician can assess the health of your transformer and replace it if necessary, which leaves the work to someone who won’t burn down the house.
The thermostat wire, wall wires, or wires in your furnace could also be the problem. A loose wire can blow a fuse when it touches metal. If you’ve ever scuffed your socked feet on the carpet and then touched someone to shock them, you get the idea of why this happens. Electrical wires on metal generate a charge and this charge increases voltage. The excess voltage blows the fuse.
Yes, it’s extremely frustrating when your furnace blows a fuse, but please don’t try to fix the problem on your own. Rather, call us here at Vredevoogd Heating & Cooling and let us come to your home or office and take a look at your system. If you’re in Grand Rapids, MI, give us a call at 616-828-5411. Kalamazoo homes and businesses can reach us at 269-200-4690. Those in Lansing should call 517-336-3225.