Last Updated on November 8, 2022 by Admin
When the temperatures outside make it too chilly inside, you’ll likely switch your thermostat on over to engage your heater. After many months of running the AC, though, you may notice a strange burning smell as the warm air blows out the vents.
However, before you panic and call the fire department, there’s something you should know about that burning smell. Sometimes, that burning smell is a normal part of activating the heating system for the first time in the winter season. Other times though, you will need to take immediate action.
Is It Normal for Your Heater to Emit a Burning Smell?
In the case of turning your heater on for the first time since last winter, that burning smell is quite normal. It’s simply the dust on the heating unit which will burn off quickly. However, if the smell is more electrical, that’s not normal. Lee Heating & Cooling recommends that you call an HVAC expert immediately to have it inspected to prevent a fire.
Why Does My Heater Make This Smell?
Because there are several reasons why your heat will create a burning smell, it’s essential to know what causes it. Some of these things you can handle on your own but for more severe problems, you will need to call in a professional.
Layer of Dust
When it’s hot outside, you’re busy running your air conditioning. During this time, your heater collects dust. The dust particles build up on components. When you finally switch it on again during the next cold snap, it creates a burning smell.
If it’s dust, there’s nothing to do except let it burn off as the heater reactivates. The smell should dissipate soon enough. Ideally, run your heater for about 10 to 15 minutes, and the smell should decrease or disappear altogether. If it doesn’t, you’ll want to contact an HVAC company for assistance.
Old Filters or Dirty Vents
Changing your filter is essential for the proper efficiency of your HVAC system, including the heater. If your filter hasn’t been changed in a while, it can undoubtedly lead to your heater creating that burning smell.
Additionally, old air filters will trap mold and mildew in the ductwork. If you smell something musty, this is the likely cause. You should change the filter every 30 to 60 days, depending on your lifestyle habits.
However, if the filters are okay, it indicates your ductwork needs cleaning. Always leave a job like this to the professionals!
Foreign Objects in Your Heater
Your heater should never create the smell of rubber or plastic burning. If this is what you smell, there is likely a foreign object that doesn’t belong there. Small household items like toys for kids or pets can get stuck there.
To find it, you’ll want to see which room has the strongest smell and open the vent there. If you can’t find anything in the vents, turn off your heater. Burning plastic and rubber create toxic fumes, and you will want to get a professional HVAC technician to find the source of that smell.
Electrical Issues
Wear and tear or improper installation could cause damage to the wires in your HVAC system, leading to an electrical burning smell. Most heating systems will shut down when they begin to overheat as a safety feature. However, this may only sometimes be the case.
If you smell anything electrical burning, immediately turn off the system to prevent a fire. Then call in a professional from an HVAC company to make the necessary repairs.
Prevent That Burning Smell from Your Heater
To prevent that burning smell from permeating your home or causing more severe problems, it’s wise to schedule routine maintenance with a quality HVAC company. In doing so, you’ll keep comfortable throughout the season and keep from being saddled with expensive repairs.
