Why Does My Furnace Keep Blowing Fuses?

Feb 11, 2020 | 0 comments

Due to the fact that your furnace performs so many different operations, it comes as no surprise that there are a number of fuses involved in its various processes. The presence of so many fuses means that, inevitably, there will be the occasional blown fuse to deal with. However, if blown fuses have become frequent occurrences, this could be an indication that there is a more serious underlying problem with your heating system. Canal Winchester Heating & Cooling, located in Canal Winchester, Ohio, has put together a list of the most frequent reasons furnaces blow fuses on a regular basis. We are at your service 24 hours a day, 7 days a week, 365 days a year to provide the best and HVAC care for our customers. If you are experiencing issues with your heating system, don’t hesitate to contact us. 

Reasons Your Furnace is Blowing Fuses in Canal Winchester, Ohio 

Wiring Issues 

A frequent explanation as to why a furnace begins to blow fuses is because wiring has become loose or damaged. A poor wiring connection can easily cause a furnace to short circuit. Faulty wiring can not only cause fuses to blow, but it also creates a serious fire hazard. A professional HVAC technician can inspect your system, check all wiring and connections for any issues, and make any necessary repairs right away. 

Problems with Your Thermostat

Some types of thermostats feature metal frames. If the wiring inside these thermostats becomes loose and gets too close to either the metal frame or other wiring, the voltage running through the thermostat can become too high for the wiring to handle. If this happens, the system’s control board will become overloaded and blow. This will result in your furnace’s draft inducer shutting down. The draft inducer is a vital component of your heating system. It eliminates any remnants of the combustible gases produced by your furnace’s heating cycles. If the draft inducer is not working, the entire heating system will automatically shut down for safety. 

Water May Be Present in Your Furnace

Water finding its way into a furnace is not uncommon at all. However, the moisture inside your furnace must be eliminated, otherwise serious damage to your heating system can occur. If the situation is not corrected, areas of rust can develop inside your furnace. These rusted areas can turn into holes quickly. This kind of damage can be irreparable. Any amount of moisture inside your heating system can result in short-circuiting and blown fuses. It is a good idea to contact a professional HVAC technician to have your furnace checked for the presence of moisture and have the situation remedied immediately. 

Inoperable Gas Valve 

If your home has a gas furnace and blowing fuses has become a frequent problem, there may be an issue with the gas valve. The gas valve must be able to open and close freely so that the flow of gas inside your furnace stays regulated. If the valve or one of its components doesn’t work as it should, then it will not be able to do its job, and your furnace will become overheated. This is a situation that creates a serious fire hazard. 

The Furnace Needs a New Air Filter 

Your furnace’s air filter can become clogged by the pollutants it cleans out of the air that passes through it. If a clean air filter is not present in your furnace, your system will overheat, and the result can be a complete and sometimes permanent shutdown of your HVAC system. 

Why Is an Air Filter Important?

Your furnace’s air filter traps the dust, debris, dirt, and other pollutants that would otherwise find their way into your home and circulate on the warm air from your furnace. 

A Clogged Air Filter Can Cause Major Problems

 Neglecting your furnace’s air filter and allowing it to get clogged will cause your system to become overworked and overheated as it tries to push air through the filter. This can cause your HVAC system to shut down, often permanently. 

DIY Air Filter Care 

Every 30 days during the time it is in regular use, check your furnace’s air filter. If it is dirty, replace it with a new one. Replace it at least one time during the 3-month cold-weather season. 

Wrapping It Up: Final Thoughts on Why Your Furnace Keeps Blowing Fuses 

An occasional blown fuse in your furnace is nothing more than a mild inconvenience; however, when they become a regular occurrence, it is a warning signal that there is a more serious issue. There could be a number of culprits: faulty wiring, a dirty air filter, a malfunctioning gas valve, or moisture in your furnace. Don’t second guess the issue, and don’t take any chances. Contact Canal Winchester Heating & Cooling right away and let one of our fully trained and licensed HVAC technicians perform a comprehensive inspection of your heating system and repair any issues there may be. 

At Canal Winchester Heating & Cooling, our valued customers are our number one priority. Give us a call at (614) 524-4737 or visit us online to schedule an appointment with one of our heating and cooling specialists. We pride ourselves on providing the very best HVAC service you will find anywhere. 



7300 Emerald Tree Dr
Canal Winchester, OH 43110