How to Tell if a Furnace Fuse Is Blown: 5 Signs

Do you know how to tell if a furnace fuse is blown? This information can help you make the right call as soon as you notice something amiss. Since a blown fuse often requires professional heating and repair services in The Hamptons, NY, contact a professional technician at Complete Comfort Control. Know when to contact our professionals by watching for these five signs.

#1 Your Furnace Won’t Power On

A furnace that won’t turn on is one of the more obvious signs of a blown fuse. No matter how much you change your thermostat settings, your furnace just won’t respond. Once you realize your furnace won’t respond to thermostat commands, you may need to dive deeper to find the problem at its source.  

#2 Your Furnace Short-Cycles

Sometimes, your furnace remains responsive despite having a blown fuse. However, it won’t run through the typical cycles that efficiently keep your home warm. Instead, it short-cycles constantly.

The average furnace cycle lasts between 10 and 15 minutes, producing hot air that effectively reaches your set temperature. When a furnace short-cycles, it only works for a few minutes before the cycle ends. It may repeat this behavior until it stops working or you resolve the underlying issue. 

#3 You Smell Burning Odors

Blown fuses are electrical problems sometimes caused by power surges. Smell is a powerful indicator of whether you have a blown fuse. Components with electrical issues may produce a burning odor that alerts you to the problem.

When you encounter a burning smell from your HVAC system, call an HVAC technician to address the problem safely and professionally. 

#4 Your Pilot Light Malfunctions

The pilot light provides ignition for your furnace’s burner. Your furnace won’t light or produce heat if the pilot light malfunctions. You can learn how to tell if a furnace fuse is blown by checking the status of the pilot light.

If this component lacks a flame, you might have a blown fuse on your hands. However, faulty pilot lights can indicate numerous other issues. A technician can pinpoint the issue’s source with precision. 

#5 The Vents Don’t Emit Warm Air

Your furnace may produce air without taking the chill out of the room. When your furnace cycles, stand near a vent to check how the air feels. If the vent produces cool air that doesn’t match your temperature settings, your furnace may have blown a fuse. 

Why Do Fuses Blow?

Furnace fuses blow for numerous reasons, like power surges from a power grid malfunction or lightning strikes, a defective blower motor, or even age. If your furnace constantly blows fuses, you may need to decide whether a repair or replacement service offers the most cost-effective solution.

An HVAC technician typically resolves blown fuses by accessing the furnace control board containing the fuse. If they observe a blown fuse, they’ll replace it with another fuse with the correct wattage and size. Finally, they’ll investigate the furnace and related appliances for reasons behind the blown fuse.

Sometimes, you just had a one-off issue that won’t repeat. Other times, your furnace may require other repairs related to the issue. You might also have an electrical issue with a malfunctioning circuit breaker or another electrical component. 

Preventing Blown Fuses

Blown furnace fuses occur at the most inopportune times. When you and your family want to stay secure and warm indoors, you’ll suddenly have an inoperable furnace with a blown fuse standing between you and your ideal temperature. You can avoid these circumstances by employing the following prevention methods:

  • Make sure your furnace has proper ventilation. Check the furnace exhaust for obstructions regularly. You should also remove any obstacles placed before vents.
  • Ask an HVAC technician whether your current furnace size is optimal for your indoor living space. Furnaces that don’t fit the building blow fuses more often. 
  • Ensure the electrical delivery fits your furnace’s needs. HVAC systems have specific electrical intake requirements. A powerful surge can damage numerous appliances. 
  • Prolong your furnace’s lifespan with regular maintenance services. During maintenance, an HVAC technician will check for issues that may result in a blown fuse and other repairs. 

At Complete Comfort Control, We Know How to Tell if a Furnace Fuse Is Blown

At Complete Comfort Control, our experienced crew knows how to tell if a furnace fuse is blown. We also know how to provide safe, efficient heating installation and repair services to ensure you achieve the comfort you deserve. Call us at (631) 910-7999 to schedule our services.

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