As the temperature drops and we rely on our furnaces to keep our homes warm and cozy, encountering a strange odour emanating from your heating system can be a cause for concern.
It’s crucial to understand that different odours can indicate various issues within the furnace, and whether you need to get your furnace repaired.
We can’t say it enough – furnace maintenance is extremely important to ensure these smelly issues don’t happen when you need your furnace the most!
This guide will walk you through the common furnace smells, their potential causes, and most importantly, what steps you should take if you come across these unusual scents:
- Burning odour
- Dusty smell
- Metallic scent
- Rotten eggs
- Stinky fish
- Musty aroma
- Chemical odour
- Smoke-like smell
- Plastic-like scent
1. Burning Odour
A distinct burning smell when you first start up your furnace after a period of inactivity is a common occurrence. This odour is often attributed to accumulated dust on the furnace’s heat exchanger. This issue can also be linked to a loud rattling noise coming from your furnace or your furnace frequently turning on and off.
As the furnace heats up, the dust particles burn off, creating the characteristic scent. In most cases, if your furnace smells like burning, this is perfectly normal and not a cause for concern.
However, if the burning furnace smell persists beyond the initial startup, it may indicate a more serious issue. This could be due to a clogged filter or even a malfunctioning blower motor.
It’s important not to ignore a lingering burning odour, as it could lead to overheating, carbon monoxide buildup, and potential damage to the furnace components. In such cases, it is advisable to contact a professional technician to inspect and address the issue promptly.
2. Dusty Smell
This is another one of those furnace smells that is fairly common, especially when you first start your furnace after a period of inactivity. This burning dust smell is typically a result of settled dust within the furnace burners. When the furnace is activated, the dust burns up, producing the characteristic scent.
While dusty furnace smells are generally harmless, it’s important to monitor if it persists or becomes more pronounced over time. If the smell continues, it may be an indication that the furnace needs a thorough cleaning or that the furnace filter requires replacement. Neglecting this maintenance could lead to reduced efficiency and potentially more significant issues down the line.
3. Metallic Scent
If you notice a metallic smell emanating from your furnace, it could signal a mechanical issue within the system. This smell may be indicative of a loose or damaged component, such as a belt or a bearing. Ignoring a metallic scent could lead to further damage and potentially costly repairs.
It’s crucial to address this issue promptly by contacting a professional technician. They will be able to assess the furnace’s components and make any necessary repairs or replacements. Taking quick action can prevent more extensive damage and ensure the continued safe operation of your furnace.
4. Rotten Eggs Odour
Furnace smells reminiscent of rotten eggs are a cause for immediate concern. A rotten egg smell is often associated with a natural gas leak. Natural gas itself is odourless, but gas companies add a chemical called mercaptan to give it a distinctive gas smell for safety reasons.
If you detect this scent, it’s imperative to act swiftly, as gas leaks can be deadly. Turn off the gas supply to the furnace, ventilate the area by opening windows and doors, and refrain from using any open flames or electrical devices. Call Enbridge at 1-866-763-5427 and then Contact a professional service like Ottawa Home Services immediately to address the gas leak and ensure the safety of your home.
5. Stinky Fish Smell
If your furnace smells like a pungent fish, it may indicate an electrical problem within the system. This smell is often associated with burned-out circuits or wiring. Ignoring this scent could pose a fire hazard, making it essential to take action promptly.
The first step is to turn off the furnace to prevent any further electrical issues. Then, contact a professional technician to inspect and repair the electrical components of the furnace. They will be able to identify the source of the problem and ensure the continued safe operation of your heating system.
6. Moldy Aroma
A mouldy or musty smell coming from your furnace may suggest the presence of mould within the ductwork, air conditioner coil, or in the vicinity of the furnace. This can have detrimental effects on indoor air quality and can exacerbate respiratory issues, especially for those with allergies or asthma.
If your furnace smells musty, it’s best to have a professional technician inspect and clean the ductwork thoroughly. They will be able to identify and remove any mould or moisture sources, ensuring a healthier living environment for you and your family.
7. Chemical Odour
A strong chemical smell emanating from the furnace may indicate a malfunctioning or overheating component. This could be caused by a variety of issues, including a faulty motor, wiring problems, or issues with the combustion process.
It is crucial not to ignore this smell, as it could lead to further damage or even pose a safety hazard. Contact a professional technician to inspect the furnace and identify the source of the chemical odour. They will be able to make any necessary repairs or replacements to ensure the continued safe operation of your heating system.
8. Smoke-like Smell
If your furnace smells like burning or smoke, it may signify a blocked chimney or furnace exhaust vent. If this occurs, the combustion exhaust is usually redirected into your air ducts. This could lead to dangerous carbon monoxide buildup within your home, which poses a serious health risk. If this burning smell occurs, it’s imperative to take immediate action to prevent carbon monoxide poisoning.
First, turn off the furnace to prevent further emissions. Then, ventilate the area by opening windows and doors. Contact a professional service to assess and rectify the issue promptly. They will be able to clear any blockages and ensure the safe operation of your heating system. Make sure you install a carbon monoxide detector to warn you of any dangerous buildup.
9. Plastic-like Odour
A burning plastic smell is a cause for immediate concern, as it may indicate overheating components or electrical issues within the furnace. Ignoring this smell could lead to further damage and potentially pose a fire hazard.
The first step is to turn off the furnace and refrain from using it until the issue is addressed. Contact a professional technician to inspect the furnace and identify the source of the plastic-like odour. They will be able to make any necessary repairs or replacements to ensure the continued safe operation of your heating system.
Ottawa Home Services Can Help
If you find yourself with a stinky furnace, don’t hesitate to take action. Ignoring these odours can lead to more significant issues down the line. Contact a professional technician at Ottawa Home Services to inspect and address the problem promptly.
We’ll ensure that your heating system operates efficiently and safely, providing comfort and peace of mind for you and your family. Don’t let a strange odour compromise the warmth and safety of your home this winter!
Received a letter from Enbridge? Learn about the Open Bill Program and new payment process