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why does my furnace smell like something is burning

by Tabitha Kuhlman Published 3 years ago Updated 2 years ago
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Why Does My Furnace Smell Like It’s Burning?

  • Dirty furnace filter If you turn on your furnace for the first use of the season yet the smell of dust burning continues throughout the day, a dirty furnace filter is a common cause. ...
  • Overheated blower motor Without adequate air flow, the furnace blower motor may overheat, making your home smell like something is burnt. ...
  • Burning wires ...

During your furnace's dormant period it has accumulated layers of dust on its internal components, such as the heat exchanger as well as in and around the burners. As your furnace heats back up it is burning this dust off, hence the burning smell. This is normal and is not considered to be a safety hazard.Sep 22, 2021

Full Answer

Why does your furnace smell when you turn it on?

Why Does My Furnaces Smell When You Turn It On?

  • Electric part burning and/or metallic smell. An electrical component burning smell is likely because of a heat buildup inside the furnace. ...
  • Visible smoke from the furnace. Smoke coming out from your furnace is usually because of blocked air filters and/or vents. ...
  • Rotten egg smell. ...
  • Chemical like smell. ...

Does that burning smell mean you need furnace repair?

When there is a problem with the wiring or electrical connections inside the furnace, you may notice a smell of burning plastic that makes its way into your home. Electrical burning smells and burning plastic odors need to be taken seriously – immediate repair services are necessary.

Why does my furnace smell like something is burning?

Common Furnace Smells

  • Gas Smell. This one is pretty straightforward: if you smell sulfur or rotten egg odor coming from your furnace or vents, you may have a natural gas issue.
  • Dusty Burning Smell. ...
  • Moldy, Damp, or Funky Smell. ...
  • Chemical/Burning Plastic Furnace Smells. ...

Why does your furnace smell likes it's burning?

6 Reasons the Furnace Smells Like It's Burning Burning Dust. There's a good chance you've noticed a burning smell come from the furnace when you turn it on for the first time as the cold weather sets in. ... Clogged Air Filter. Sometimes, simply changing the air filter on a furnace can keep it from putting off a burning smell. Electrical Burning. ... Burning Plastic. ... Smell of Gunpowder. ... Smell of Oil or Smoke. ...

Why does my furnace smell like dust?

What does it mean when your furnace smells like rotten eggs?

How to get rid of a furnace smell?

What to do after furnace is off?

What is the number to call for furnace repair in Chicago?

How to stop a furnace from burning?

Can you clean a furnace without a filter?

See 2 more

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Why does it smell like something is burning in my house?

A plastic burning smell in house situation can occur from a number of sources. Faulty wiring or an overheated appliance can have an odor that smells like burning plastic. If it's coming from your HVAC system, it could be from an overheated blower motor -- possibly due to heavy dust buildup or a clogged air filter.

What does it mean when you smell something burning but nothing is burning?

Phantosmia is a condition that causes you to smell odors that aren't actually present. When this happens, it's sometimes called an olfactory hallucination. The types of odors people smell vary from person to person. Some might notice the odor in just one nostril, while others have it in both.

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.

What does carbon monoxide smell like?

Carbon monoxide gas is colourless and does not smell, so you cannot tell if it is around you. Symptoms of carbon monoxide poisoning include: headache. dizziness.

What does electrical fire smell like?

An electrical fire initially has a fairly acrid smell of plastic burning. The short could be in the outlet or in the wiring inside a wall and can be hard to locate. Experts say if you smell something electrical burning you are lucky – most warning signs of electrical fires are invisible and odourless.

What does a bad furnace smell like?

Furnace smells like rotten eggs or like a sewer If you're near your furnace and detect a smell that's a bit on the sour side or that stings your nose, you have a pretty serious problem and should shut off your furnace and get it serviced pronto.

Can a dirty furnace filter cause a smell?

A dirty filter can allow extra dirt to buildup in your furnace, which will lead to a burning smell. A bigger issue that can be caused by a dirty filter is that your blower may have to work harder to move air, which can cause it to overheat and produce a burning smell.

Does Covid make you smell burning?

Fatigue, body aches, poor sleep and altered taste and smell are some of the long COVID symptoms Donavon is dealing with. “Everything smells like a burning cigarette,” his mother said.

What are phantom smells a symptom of?

Phantosmia may be caused by a head injury or upper respiratory infection. It can also be caused by aging, trauma, temporal lobe seizures, inflamed sinuses, brain tumors, certain medications and Parkinson's disease. Phantosmia can also result from COVID-19 infection.

Is phantosmia serious?

Phantosmia is not usually a cause for concern, and it often clears up by itself. It can also be a symptom of a more serious condition, so people experiencing phantom smells should see their doctor to check for underlying conditions or complications. The best treatment will depend on the cause of phantosmia.

What does it mean when you smell something that isn't there?

Smelling things that aren't there is called phantosmia. It can be unpleasant and affect how things taste. But it isn't usually serious and may go away by itself in a few weeks or months. See your GP if the strange smell doesn't go away in a few weeks.

6 Reasons Why Your Furnace Smell Like Its Burning - Smile HVAC

Winter is quickly approaching as well as the cold that comes with it, so it is time for you to take the wise decision of relighting your furnace after a long period of inactivity.

7 Common Furnace Odors and Their Causes

When you use your furnace, the last thing you expect is for your nose to be treated to a variety of strange smells. Unfortunately, your furnace can produce odd odors — some of which are relatively harmless, but others could indicate an ongoing safety hazard and the need for immediate HVAC service.

Weird Furnace Smells? This Could be Why! | The Family Handyman

Family Handyman. If your furnace smells like burning plastic, shut off the furnace and get a furnace technician out to service it immediately. That odor means electrical components and/or wires are getting scorched because of a short or some other malfunction.

How to keep furnace from smelling?

Maintenance is key in avoiding a troublesome furnace smell. First, replace your filter as often as it needs. How often depends on the kind you have, but most filters should be replaced at least once a month. Other filters, like high-efficiency filters, can last as long as six months. Second, schedule annual maintenance with an HVAC professional. We’ll clean your unit, switch out your filter and check the components to ensure your system stays up and running to keep your family comfortable all year long.

Why does my furnace smell like plastic?

Do you have small children? To them, air vents are like tunnels of mystery, and dropping toys or other objects inside the vents can be incredibly tempting — we've seen our fair share of surprises! A burning plastic smell could also indicate something more serious, like a scorched wire.

What happens when a furnace is inactive?

When a furnace is inactive for a while, dust and dirt particles can settle on and inside your furnace and ducts. As cooler weather rolls in and the heat kicks on for the first time in months, the dust burns off and releases a faint odor.

How long does it take for a odor to go away from a furnace?

If the smell doesn't go away within an hour or so, check and replace your filter. If the smell still lingers, call a professional. We'll inspect your unit for other possible sources of the odor.

Why does my furnace smell like it's burning?

In an attempt to keep pushing air through the clogged filter, a burning smell starts to develop because of the overheating. Plus, a clogged filter causes high levels of dirt to accumulate on the furnace, which will burn off and produce a burning odor when the furnace heats up.

What does it mean when a furnace smells like gunpowder?

Smell of Gunpowder. Once the circuit board overheats in a furnace , it will give off a smell that’s something similar to the smell of gunpowder. The same applies to an overheated fan motor. Shut off the furnace immediately if you smell gunpowder, and have a professional HVAC contractor visit your home to make necessary repairs.

Why does my HVAC system smell?

When you turn it on for the first time each year, this dust burns off and produces a burning smell. The vents connected to your home’s heating system will usually emit this smell throughout the entire home, but there’s no need for alarm. After a few minutes, the smell will dissipate. If it doesn’t, you should contact an HVAC specialist to determine the problem.

Why does my furnace not power down?

If it doesn’t, this means the safety feature on the unit is broken, and you need to have it fixed promptly. Without this safety feature functioning, the risk of an electrical fire increases and presents a major safety hazard for you and your family. Have an HVAC specialist check for burning electrical components if you notice a burning electrical smell coming from your vents.

Can an HVAC unit catch on fire?

The unit could catch on fire if you continue running it.

Why does my furnace smell?

This smell usually means that dust has settled in your furnace heating system and is getting stirred up from the furnace being cut on. As the dust burns off, the smell should disappear quickly. It shouldn’t last longer than an hour!

Why does my furnace smell like it's burning?

When your furnace smells like it’s burning, it could be a sign that something’s wrong with your heating system. Some smells are common, and some may be a symptom of a potentially dangerous problem. So it would be best if you didn’t ignore any odors coming from your furnace.

How long has Mas Broto been in the HVAC industry?

Have been in the heating and air conditioning (HVAC) industry for over 20 years. He is person that will grow and thrive to learn more about the HVAC industry throughout his career. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life.

Can a furnace burn dust?

Even though the dust inside your furnace may burn off, a residue will be left behind. This will reduce the performance and efficiency of your furnace. Therefore, it would be smart of you to schedule an appointment with a professional HVAC technician to have your furnace inspected.

Is it normal to smell a burning furnace?

A burning smell, especially when the first time you turn on the furnace, maybe normal. But, how long it lasts is very important when determining the severity of the situation. It is also very important that you pay attention to any other smells coming from your furnace.

Why does my furnace smell like it's overheating?

An electrical burning smell coming from your furnace indicates that it’s overheating. Wear and tear on components such as bearings and the blower motor can cause them to malfunction leading to overheating. The extra heat can melt other components in the system that are rubber as well as create sparks.

Why does my furnace smell like formaldehyde?

If there is a chemical odor that smells like formaldehyde, your furnace most likely has a cracked heat exchanger. A cracked heat exchanger is extremely dangerous for two reasons. First, it can fill your home with carbon monoxide. Second, it can cause a fire in your home. At Miller’s Heating & Air we take cracked heat exchangers very seriously.

Why does my heating system smell like rotten eggs?

Heating system smells that smell like rotten eggs or sulfur indicates a natural gas leak. Natural gas is odorless. Gas companies have added a chemical to the gas, which causes it to smell like rotten eggs and/or sulfur so home owners know when there is a gas leak. Inhaling natural gas is a health hazard, which can result in nausea, fatigue, dizziness and breathing issues. If there is a natural gas leak in your home, turn off your system immediately. Open your windows in order to increase ventilation and call an HVAC service professional for a heating service appointment. As a safety precaution, you may want to stay out of the home as a safety precaution until the problem has been fixed during a heating service appointment.

Why do my socks smell like dirty socks?

What is the culprit? When your furnace coils cycle between heating up and cooling down, it creates condensation that allows bacteria to grow. Bacteria builds up in your system over time and causes the smell. An annual maintenance completed by trained technician should take care of this problem. During an annual maintenance, your furnace coils are cleaned. It is also important to keep up on changing your furnace filter regularly.

What happens if you spill oil on a furnace?

If this catches on fire, it can cause a burning smell and even smoke. Lastly if you spill while refilling your oil tank and a smell may linger for a few days. If it continues past that period, you should have an HVAC professional who works on oil furnaces investigate the issue during a heating service appointment.

Why is my oil furnace catching on fire?

There is a higher likelihood of this occurring if your oil furnace is in your basement. Make sure to keep debris and items far away from your oil furnace to prevent them from catching on fire. Another possible cause is an issue with the oil and the burner.

What to do if you smell electrical burning?

If you smell electrical burning, immediately turn of your system in order to prevent a fire. You will need a trained professional to assess your system during a heating service appointment and repair it before it can be safely used again.

Furnace Smells Like Burning Dust

This is the most common and (thankfully) least worrisome smell. While you’re not using your furnace in the summer months, dust settles everywhere. After that first ignition and first few cycles, the dust will burn off and create that familiar odor. No reason to panic! If it doesn’t stop after a few cycles, try changing or cleaning your filter.

Furnace Smells Like Burning Plastic

First check all your vents and ducts for wayward plastic toys, plastic wrapping, or other debris—especially if you have little ones. You know better than anyone that your kids’ favorite toys end up in the most unlikely places! Checking for the obvious can save you lots of time and worry.

Furnace Smells Oily or Smoky

You’ll experience this if you have an oil furnace. This usually means the oil filter needs cleaning or replacing. It could also be a blocked chimney. Regardless, turn off your unit immediately and inspect the issue further. Oil furnaces often emit smells similar to the smell of smoke or oil.

Furnace Smells Metallic, Electrical, or Chemical

Usually if your furnace is overheating, it will automatically shut off. But if there’s something wrong with the blower motor or heat exchanger, this safety feature won’t kick in. These overheated parts create a metallic, electrical, or chemical smell. Some people say this issue causes a smell like formaldehyde.

Furnace Smells Like Burning Gunpowder

If you’re getting a distinct odor of gunpowder, you probably have a fried circuit board or fan motor. Turn off the furnace and call us for a safety inspection.

Furnace Smells Like Rotten Eggs

Natural gas is odorless, but your gas company adds sulfur to make gas leaks easier to find and correct. So, a rotten egg smell means you’re having an issue with your gas supply. That sulfuric smell is added to gas to alert you. Shut off the furnace immediately and call for service.

Furnace Smells Musty or Mildewy

If you turn on your furnace and it smells like a damp basement or moist dirt, there are a couple potential causes. The first thing to check is your air filter and to replace or clean it as needed. Next, check your humidifier filter (if you have one) for mold. Clean with water and vinegar for an easy fix.

What Do We Mean by Furnace Odors?

That smell is typically burning dust pushing its way through your ducts. The distinct smell of dust or burning dust should dissipate in a matter of hours.

Is It Normal to Smell Gas Near a Furnace?

No. Mercaptan smells may mean disaster for your home. Gas leaks are incredibly dangerous and should be addressed immediately.

Is It Normal for a New Furnace to Smell?

Please don't panic. A newly installed furnace may give off an unpleasant smell when you use it for the first time. The smell after you turn on your new furnace is the protective oil coating on your new heat exchanger. It should burn off, and the smell should dissipate within an hour or so. If the smell persists for more than a day, consult your HVAC technician.

Why does my furnace smell like dust?

Most furnace odors fall into three categories: Dusty burning smell: This often indicates that it’s time to change the air filter. The furnace may also have dust settled on the inside. Dust and clean the parts you can reach, then call for service if the burning smell continues.

What does it mean when your furnace smells like rotten eggs?

Gas leak (rotten egg smell): That sulfuric smell is added to gas to alert you. Shut off the furnace immediately and call for service. A professional can diagnose the problem, which may be a cracked part or a failing pilot light or ignitor.

How to get rid of a furnace smell?

As the homeowner, you can change the filter to help with dusty smells. For most anything else, you should call a heating technician to be safe. Here are the steps to follow: 1 Turn off the furnace. Avoid the temptation to keep the heater unit running while you search for the source. Be safe, turn off the furnace, and then visually inspect for the cause or call a professional. 2 Look for active fire or smoke. Rule out an active emergency and call 9-1-1 if you do find anything dangerous! 3 Inspect for burn damage. After the furnace has been off for a while (so you don’t risk touching hot parts), inspect the equipment and any nearby objects for signs of burning or melting to give you an idea of the location and extent of the damage. 4 Clean the air filter and equipment if you can. Some furnaces are difficult to clean without professional equipment, but you may be able to dust and wipe down some dusty parts. 5 Call a heating repair service for anything beyond normal homeowner maintenance. If it’s not just a dusty air filter, that burning smell is telling you that your furnace has a problem. Call a pro if anything seems less than ideal, or if the smell comes back.

What to do after furnace is off?

After the furnace has been off for a while (so you don’t risk touching hot parts), inspect the equipment and any nearby objects for signs of burning or melting to give you an idea of the location and extent of the damage. Clean the air filter and equipment if you can.

What is the number to call for furnace repair in Chicago?

Furnace Repair in Chicago’s North Shore. For heater help in Chicago’s North Shore, you can call Glenbrook Heating & Air Conditioning at 847-729-0114 for furnace repair, troubleshooting, and HVAC service.

How to stop a furnace from burning?

Here are the steps to follow: Turn off the furnace. Avoid the temptation to keep the heater unit running while you search for the source. Be safe, turn off the furnace, and then visually inspect for the cause or call a professional. Look for active fire or smoke.

Can you clean a furnace without a filter?

Some furnaces are difficult to clean without professional equipment, but you may be able to dust and wipe down some dusty parts. Call a heating repair service for anything beyond normal homeowner maintenance. If it’s not just a dusty air filter, that burning smell is telling you that your furnace has a problem.

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31 hours ago Web · One possibility is that your air filter is clogged. When your furnace filter is clogged, your blower motor will have to work extra hard and it can begin to overheat. …

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31 hours ago Web · Clogged Air Filter. Sometimes, simply changing the air filter on a furnace can keep it from putting off a burning smell. The blower motor has to work much harder when …

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