As long as no smoke is coming out of the furnace — and the dusty burning smell goes away after a short time — the acrid smell is harmless. Items can fall next to an oil furnace pilot light and catch on fire. Although the notorious smell is unpleasant, it does not necessarily mean that there is an emergency. I have a smell like Crayola Crayons coming from one system. It started this winter when running the heat and is there when just the fan is running and when the AC is on. Over the warm months, while the furnace is not used, dust from the home will settle in the combustion chamber. My furnace started to smell electrical fire once in awhile (not consistent). Furnace Smells Like Rotten Eggs. I have 3 Unico 2 year old HVAC systems w/ exterior Bryant AC units that use Puron 410A. Or the kids shoved the crayon(s) into the dash vents.. Who knows. This usually indicates a broken or failing mechanism within your heating unit. One of the most common burning smells you'll experience with your furnace will happen when the unit is turned on for the first time of the cool weather season. Burning Smell. If a weird smell is wafting through your home, it might be a signal that something is very, very wrong with your furnace. A small amount of mold or mildew may dissipate on its own after a few cycles of the heating unit. If you have any questions about why your furnace smells like something’s burning, or if you’d like a heating system serviced or installed in your home, contact Jerry Kelly, your St. Louis furnace repair and installation contractor. Water Heater Smells Like: Gas . If you’ve ever turned on an old light fixture, you likely know the smell of burning dust. Burning odors that smell like plastic can be due to a motor or electrical function issue when the system gets too hot. After turning the furnace on, the dust on it burns and gives off a burning odor that spreads the entire house through a vent. These items could catch fire or melt, resulting in the smell of smoke and burning plastic. Like dust, mold and mildew can collect on unused furnace components. If you’ve just turned your furnace on for the first time season only to notice that the air coming from you vents smells rather musty, it is possible that there is mold growth within your ductwork. If your furnace smells like smoke, it could likewise indicate a blocked chimney, so in any case you need to address the burning smell immediately. Brave homeowners will hold their breath as they approach the thermostat and turn on the furnace for the first time. That odor means electrical components and/or wires are getting scorched because of a short or some other malfunction. Burning plastic or rubber – if components or electrical elements inside your furnace are getting too hot, they may produce furnace smells similar to burning oil, hot plastic, or rubber. Over time, your water heater can accumulate dust and other debris and when it runs the dust and other debris can burn up, causing a burning dust smell. Is your furnace in need of servicing? Often times, a water bottle cap, toy or other plastic object has found its way into the furnace and is now succumbing to the heat. The house furnace always had a distinct smell, but it was more like warm metal - nothing serious, but was that "ah, the comforting smell of cutting the chill!" A dusty, burning smell coming from your oil or gas furnace can be quite common, especially early in the heating season; the smell is often the result of your furnace burning away dust and dirt that has accumulated during the offseason. Family Handyman. 3. As a result, the system can collect some dust and debris. Gas leak (rotten egg smell): That sulfuric smell is added to gas to alert you. The smell of burning dust is very common when turning on the furnace for the first time in the fall. Dusty burning smell: This often indicates that it’s time to change the air filter. Normally this dust burns off harmlessly within a few hours. I guess it happens when we run the heat for a long time (many continuous days during cold weather). If dust is the cause, the burning smell should go away after a few hours. sensation. Know the odors that could signal trouble ahead. Turn off the furnace and call us for a safety inspection. We service the St. Louis area, including towns like St. Charles, Wentzville and Winghaven, MO. This smell can also be the result of a frayed wire shielding melting. Why does my furnace smell like burning plastic It is a common question that we get around this time of year, and that is why you are reading this right now: Why does it smell bad when I turn on my oven? When your furnace smells like a hot curling iron or burning metal, it could mean an electrical part is broken or malfunctioning. But, if the burning smell also seems sweet, it may be wise to look for nearby sugar. Shop Local HVAC Offers . I have got a burning smell coming from my indoor air conditioning unit who should I call? What Burning Smell From Your Vents Might Mean Furnace and Heat Pump Issues. It could also mean a failing fan motor and that could mean you need a new furnace! When the burners ignite, the dust burns off, and the odor exits through your air vents. Solution: Clean your water heater regularly and wipe off the dust and other debris that accumulate over time to resolve this issue. Oil or natural gas furnaces may emanate a slight smell of burnt fuel, but not a very strong one. If the odor persists, try changing the air filter. Furnace smells like burning plastic. Furnace Smells Like Burning Hair or Dust. Natural gas is odorless, but your gas company adds sulfur to make gas leaks easier to find and correct. This is a job for a professional! Make sure to keep debris and items far away from your oil furnace to prevent them from catching on fire. No matter the cause, melting plastic can emit harmful fumes into your home, and you should take immediate measures to resolve the problem. When Your Furnace Smells Like Burning Dust . When the veil of darkness falls over Kansas City, overnight temperatures get colder and colder. Check your furnace motor to make sure it isn’t overheating. First - do not panic. If you’re getting a distinct odor of gunpowder, you probably have a fried circuit board or fan motor. Oftentimes, it’s not a fire. Throughout the warmer months, dust settles on your furnace’s heat exchanger and ductwork. My Furnace Smells Like Burning Dust! The dusty burning smell inside the furnace is the most common odor you will come across. Furnace Smells like Burning Plastic. What causes the smell of burning dust? But, there’s more. One of the most common smells most people detect when turning on their furnace for the first time in the season is a burning odor. If the air from your furnace smells like singed wires or burning rubber, it is likely that a component in your system is overheating and needs to be replaced. Your furnace could create a smoky or burning oil smell for a variety of reasons: If you keep your furnace in a basement or storage area, nearby items (such as toys, decorations, and clothing) could fall too close to the pilot light. Mold may smell similar to the moisture discussed in section two, but the smell generally won't … Turn off the furnace and contact a technician to inspect your system as soon as possible. There are a few other causes an HVAC tech could inspect for you. If your furnace smells like burning plastic, shut off the furnace and get a furnace technician out to service it immediately. Water Heater Smells Like: Burning Dust. For example, if your furnace smells like sewage, the odor likely comes from a sewer system opening that is near your intake system. Moldy furnaces are more common in areas with high humidity and in homes where the furnace stays cool and damp. Fuel Odors. 4. It’s also possible that a plastic household item or toy has found its way into your furnace. The smell of burning plastic is a distinct scent and a sign that something is melting in your furnace. All furnaces can develop an electrical odor, no matter what heating fuel they use, because electrical wiring powers motors and fans. Must. Turn on your heating system and let it run for a few minutes if the smell is a mild burning smell if this is the first time the heat has been turned on this season. Decipher the smells coming from your furnace. Imagine if you went six months without dusting the coffee table, and assume the inside of the chamber would look the same way. I also notice sometime it has weird noise, like … It usually happens when you switch it on when the summer is over. The furnace may also have dust settled on the inside. The heat exchanger of your furnace gets extremely hot when it operates and this heat will “burn” any dust that has accumulated on the parts over the summer months. Heater Burning Off Dust. My heater smells like burning plastic what should I do? Shop HVAC offers in your area. im having the same problem it kind of smells like a old heater that's heating up and burning thedust off but it just keeps getting stronger. Here are some tips to get you started. Rotten Egg Smell. Dusty/burning smell. Scary though it may seem, a burning smell is quite common when you first start up your furnace in the fall. Smells like rotten eggs, burning electrical, or chemicals coming from your furnace should never be ignored, because they could be signs of a serious or even dangerous problem. After months of disuse, dust has settled on the heat exchanger, burners, and other heating components. Furnace Smells Like Burning Gunpowder. However, the furnace still works while smelling. When you turn on your heater and the heat exchanger warms … If you smell odors that suggest something in your furnace is overheating or burning, shut the furnace off immediately and call a technician. ... My gas furnace smells like burning plastic, what could it be? While it’s normal to notice a dusty burning smell the first time a furnace runs in the winter, if the odor continues, it should also be checked out by a professional. A furnace may get hot enough to burn off dust and create this smell. The smell of burning dust is very common when turning on the furnace for the first time in the fall. This is often the case during the winter. 4. Sharp Mildew and Mold Smells. Let’s explore a few reasons your furnace smells like burning dust: Your Furnace Is Actually Burning Dust; During the summer season, your furnace sits dormant. In some cases, dampness can lead to mold. Mold. Dust and clean the parts you can reach, then call for service if the burning smell continues. The best preventive measure is to change the filter as recommended by the manufacturer to prevent overheating. If you leave this problem untreated and act like the smell will simply go away, you could be facing a hefty repair bill or worse, health problems. If your furnace smells like burning plastic, it’s time to call a technician. 5. Because your furnace has a long off-season (i.e. There is a higher likelihood of this occurring if your oil furnace is in your basement. The odour is usually caused by several months’ worth of dust. The contractor can't find anything wrong with the system. Over the warmer months when the heat is not in use, the dust from your home can settle in the vents and around the heating elements or combustion chamber in your furnace. Sometimes the problem is in your furnace and heat pump. My Furnace Smells Like Burning Dust When the burners ignite, the dust burns off, and the odor exits through your air vents. A burning oil smell only applies to home owners that have an oil furnace. Perhaps some child tossed their crayons on the dash, then they rolled down the defrost vents. A burning electrical or plastic odor may indicate melted or burning electrical wiring and should be investigated immediately. If your air smells like it’s burning when the furnace comes on, typically, you should look for dust. Then it appears – not a ghost or a goblin – worse! 6. It’s a natural occurrence for most appliances throughout your home that haven’t been used in a while. Are you worried about a burning smell coming from your furnace when you first turn it on? Electrical Smell. It happens every fall in homes throughout the Midwest. My Furnace Smells Like Burning Dust. When the light bulb heats up, the dust that accumulated on top of the bulb starts to burn. The most common reason you might experience a burning smell when you first turn on your heat for the season is that dust has settled on your furnace heat exchanger. However, if the smell does not disappear after 24 hours or is accompanied by smoke, your furnace could have a more serious problem. I've run it for hours to try and flush the smell out.
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