As we approach the colder winter months, the question of when to turn on your heat may be a hotly contested topic in your household. Whenever you decide to turn up the heat, you may smell a distinct odor the first time your furnace kicks on for the season. Is it cause for concern? Read on to find out!

Don’t Panic - It’s Just Dust!

Over the spring and summer months when your furnace is taking a well-deserved break, dust is likely to collect and accumulate within the unit as well as on your radiators or baseboard heaters. The dust will burn off once you turn on your furnace for the season and the smell will dissipate quickly. If the smell continues for more than a day, dust may not be the reason for the smell and more cause for concern.

Electrical Burning Smell

If an electrical or metallic smell is emanating from your furnace, you may have a wiring issue or overheating motor component. First, check if your filter is dirty as a clogged filter can cause restriction of airflow, overheating your blower motor. 

 If the smell continues, this is cause for concern as there may be a risk of a potential electrical fire. Reach out to your HVAC technician to troubleshoot and repair the issue promptly.

Melted or Burning Plastic Smell

A burning plastic smell can be caused by either worn down parts or melting wiring insulation, often caused by an electrical fault within your unit. Again, reach out to your HVAC technician to troubleshoot and repair the issue promptly. In the meantime, be sure to turn off your furnace.

Smell of Gunpowder

The cause of a gunpowder smell near your furnace is likely due to an overheating part within the furnace unit. A trusted HVAC technician can identify which part is causing the smell and repair or replace the part to ensure your furnace continues to function properly.

Sulfur or Rotten Egg Smell

If you smell sulfur or rotten eggs when you turn on your furnace, it is likely a gas leak and it is imperative that you and your family (including pets!) exit your home immediately and call your gas company for emergency assistance. 

 Remember: annual furnace inspections can help you avoid issues when you and your family decide to turn on your heat in the fall or winter. During an annual inspection and tune-up prior to the heating season, HVAC technicians can thoroughly clean your unit (removing that pesky dust accumulation!), change furnace filters, and inspect and repair parts that appear to need attention or replacement. 

Wondering if it may be time to replace your furnace? Read our recent article, Can Buying a New Furnace Save You Money, to learn more. 

Have a question regarding your furnace? Reach out to our trusted and certified team of HVAC professionals. We’re here to help.

Plus, you’re always welcome to contact the trusted heating, cooling, and air quality experts at Total Temperature Control.

Whether you need 24-7 emergency service or a solution to improve your indoor comfort—at home and at work—call us at 781-224-2400 or submit a convenient contact form.

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