Why Does My Furnace Keep Blowing the Fuse?

When your furnace keeps blowing a fuse, you need to take action quickly. Regularly tripping the fuse can be a fire risk because it indicates an electrical problem. Replacing the fuse or resetting the breaker can temporarily fix the problem, but if the underlying issue is not fixed, the fuse will just blow again. To protect your family and ensure your furnace keeps working as it should, you need to find the source of the problem. While there are a number of problems that can lead to this trouble, you need to get to the bottom of the problem quickly to determine if your furnace needs to be replaced.

The team at T.E. Spall & Son is ready to help! Our expert technicians can come to your northeastern PA home to find the source of your problem and provide effective solutions. We also offer a heating replacement in Northeastern PA areas like Scranton, Wilkes-Barre, Carbondale, and the surrounding communities. So, if the problem cannot be repaired, we can install a new, properly functioning furnace.

Don’t let electrical problems keep you from enjoying your furnace to the fullest. Contact T.E. Spall & Son today for help. You can also call us at 877-591-7508!


Blown fuses usually result either from an appliance putting too much strain on the fuse or by an electrical short in the system. Since some furnaces can require a lot of electricity, homeowners must ensure that they have an adequate electrical system to support the furnace. After resetting the circuit breaker and replacing the fuse, if the fuse keeps blowing, there might be an electrical short in the electrical system that supplies the electricity to the furnace. In this case, you should call an electrician.

Faulty Transformer

Sometimes the blown fuse in the furnace comes from a malfunctioning transformer. In this case, you will need a technician to come and replace the old transformer with a new one.

Insufficient Fuse Size

If the fuse in your furnace is too small and cannot handle the wattage, it can cause your fuse to blow. If this is your problem, simply replace the fuse with a larger capacity fuse that can handle the electrical demands.

Malfunctioning Thermostat Wire

If your thermostat wire touches the metal frame of the furnace, this can cause a blown fuse. When a thermostat wire touches the metal frame of the furnace, it can deliver more voltage than the wires are designed to handle. This will blow the fuse on the control board, causing the draft inducer to not start, which then stops the rest of the furnace functions from working properly.

Loose Wires

Sometimes, your furnace may seem like it has blown a fuse, but it is actually suffering from loose wire connections.  This is usually a good place to start looking for problems with your furnace as loose wires can usually be detected with a voltage meter. If loose wires are detected, they should be repaired or replaced by an electrical or HVAC technician.

Get Professional Help for Your Furnace Today

If your furnace keeps blowing a fuse, the team at T.E. Spall & Son is ready to help. We’ve been serving the Northeastern Pennsylvania area for over two decades, and we offer comprehensive furnace repair and replacement services in Carbondale, Scranton, and Wilkes-Barre, PA. Our NATE-certified technicians understand the importance of safety for your furnace, and we will quickly diagnose and repair the solution—or suggest the right furnace for replacement.

Call us today at 877-591-7508 or contact us online to get fast answers to your furnace fuse problems.

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