Dust can build up in your ducts, & become ignited when you turn the oil furnace on.
If you live in a climate with hot summers, you might go weeks at a time without having to use your oil furnace, during this time, lots of things can happen to your oil furnace, & when you go to fire up your oil furnace on a frosty day, it is possible for your oil furnace to make odd smells, however while some smells can be an immediate cause for concern, other smells can go away on their own. Here are some smells you may experience from your oil furnace, & what you can do about them. It can be proper to smell mold or mildew coming from your oil furnace after weeks of ininterest, then your ducts are cool, dark sites where moisture can accumulate, & occasionally it can be irritated & smell enjoy mildew. Typically the moisture in your vents will evaporate after several minutes of running your oil furnace. If the smell persists after a few afternoons, you should contact your HVAC provider to have your ducts cleaned. It is also proper to smell burning dust when you turn on your oil furnace after weeks of ininterest. Dust can build up in your ducts, & become ignited when you turn the oil furnace on. The burnt dust smell should only linger around for a couple of minutes. If you smell rotten eggs or sulfur coming from your oil furnace, you might have a gas leak, but natural gas contains additives to supply it a distinct smell to alert people of it;s presence. If you smell sulfur or rotten eggs coming from your oil furnace, you should turn off your oil furnace, & contact your HVAC provider immediately.