When your furnace emits a burning smell or and metallic smell, this is usually a reason for caution. Burning smells can be a sign of wiring getting too hot or of your fan motor burning out. A metallic odor can be a sign of an internal component getting overheating or rubbing up against a moving part.

How do you fix a smelly furnace?

Burning dust smell However, if the musty smell persists, try solving this problem by changing out the air filter. If the problem persists after switching the air filter, it indicates a serious problem with the furnace.

Why does it smell when I turn my furnace on?

Electrical burning smell or metallic smell – Heat buildup in your furnace might result in an electrical burning smell or give off a metallic smell. Internal components of your furnace such as electrical wires or damaged rubber pieces may be damaged, and the heat applied to the system is exacerbating the smell.

Is it normal for a furnace to smell?

Normal dust burn-off When the furnace isn’t actively heating, dust and dirt particles can settle inside the furnace and on internal components. When you turn on the furnace the dust burns off, causing a light burning smell that should dissipate relatively quickly.

Why is my furnace blowing stinky air?

A musty smell coming from your furnace could be a sign that mold has formed in the duct system and is in need of a thorough cleaning. … Even if you aren’t sure what the reason or odor you smell could be, it’s always a good idea to call your local heating and air expert just to be safe.

Why does my heat smell weird?

What does it mean? If you smell a dusty or burning smell the first few times you turn on your heat, it’s most likely dust and dirt that’s settled on components inside your heating system throughout the summer. As you fire up the heat, those dust particles burn away, producing a weird burnt/dusty smell.

How do I freshen the air in my furnace?

Place several droplets of your favorite essential oil all over the pleats of the furnace. No need to soak it, but the more drops you place, the richer the scent. Make sure you reinstall the filter properly so the air flow is going in the correct direction. The little arrows on your filter indicate the right way.

Why does my furnace smell like a sewer?

Furnace smells like rotten eggs or like a sewer The smell can indicate a failed heat exchanger, especially if you have a high-efficiency furnace. This is a serious problem because a bad heat exchanger can pump unsafe levels of dangerous carbon monoxide (CO) gas into your home.

What does a furnace fire smell like?

Smell of Oil or Smoke Oil furnaces often emit smells similar to the smell of smoke or oil. In these types of furnaces, you’ll want to change the oil filter to ensure overheating does not occur. If the smell continues, contact an HVAC professional to diagnose and repair the problem.

How do you clean smelly air ducts?

Combine 1/4 cup white vinegar with 2 cups water in a plastic spray bottle and shake vigorously. Spray the solution very lightly into the air duct. Don’t saturate the surface or allow any of the solution to drip down into the air duct. Allow the sprayed solution to dry.

Article first time published on

Why does my heat smell like burning plastic?

Plastic – If your heater smells like burning plastic, the odor will quickly become intolerable. This smell likely means that a foreign object, such as a toy or a humidifier nozzle, has become lodged in the furnace and has been slowly baking away.

How can I make my house smell good fast?

  1. Add essential oils to your air filter. …
  2. Simmer potpourri on the stove. …
  3. Clean your garbage disposal. …
  4. Sprinkle baking soda on carpets. …
  5. Make your own room freshening spray. …
  6. Put vanilla in your oven. …
  7. Add an air freshener to your air vent. …
  8. Use a DIY cleaning spray.

How can I make my house smell better?

  1. Identify the odor. …
  2. Dust your room from top to bottom. …
  3. Clean your floors. …
  4. Open your windows. …
  5. Bathe your pets. …
  6. Wash your sheets and laundry. …
  7. Clean all upholstery. …
  8. Turn on a dehumidifier.

Why does my heat smell like rotten eggs?

If you notice a rotten egg or sulfur smell after turning on your furnace, this is a very serious concern. … Natural gas is odorless, so a harmless chemical (mercaptan) is added to give natural gas an odor, so you can easily detect a gas leak. Most people would describe the odor as smelling like rotten eggs or sulfur.

Why is there a burning smell coming from my vents?

This smell is usually the result of accumulated dust on burners, air ducts or other furnace parts, and it should burn off quickly. If the odor lingers, switch the air filter. If the smell still doesn’t go away, contact an HVAC professional to inspect your unit.

Why does my vent smell like it's burning?

If your air filter is clogged, these contaminants can get sucked into the blower and cause it to overheat. This can also lead to dirt and dust reaching the heat exchanger and heating up. Both of these will cause a burning smell and can be mostly avoided by changing your filter regularly.

Why does my house never smell fresh?

If your room smells like body odor, then that must mean that you haven’t cleaned your house in a while. Look for places that need vacuuming or areas that have a lot of damp towels or wetness. The wetness is what may cause mold to grow, which in turn, could make your house smell bad.

Why do old peoples houses smell bad?

That “old people house smell” is caused by our bodies releasing more of the chemical 2-nonenal as we age. It can also be mold and mildew commonly associated with older homes. You can get rid of this smell by cleaning up around the house and managing any damp rooms or mold.

How can I make my house smell fresh?

  1. Lemon Basil Room Spray. Freshen up rooms with the clean scent of lemon and basil. …
  2. DIY Reed Diffuser. Create a simple DIY version of a reed diffuser using baby oil. …
  3. Essential Oil Wax Melts. …
  4. Linen Spray. …
  5. Carpet Deodorizer. …
  6. Simmer Pot. …
  7. Gel Room Scent.

How can I find out where a smell is coming from?

  1. Clear your sense of smell by stepping outside for a few minutes. …
  2. Make sure the vent on the roof is not plugged up by a bird’s nest, dead animal, or leaves. …
  3. Clean the area of the strongest smell: If the hunt for the smell leads to a spot inside the house.

Why do my air vents smell like sewage?

If you smell raw sewage coming from your vents, there is one usual cause: sewage. A backed-up sewer line or a crack in a plumbing or sewer vent pipe could cause the smell. If it is close enough to your ducts, then the ducts can spread the smell throughout your home.