My furnace is very smelly

If you live in a weather conditions with hot summer seasons, you might go weeks at a time without having to use your heating system, and during this time, lots of things can happen to your heating system, and when you go to fire up your heating system on a cold morning, it is possible for your heating system to cause bad smells, and 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 heating system, and what you can do about them.

It can be common to smell mold or mildew coming from your heating system after weeks of inactivity, but your ducts are cool, dark places where moisture can accumulate, and periodically it can be agitated and smell like mildew, typically the moisture in your vents will evaporate after many hours of running your heating system. If the smell persists after a few days, you should contact your Heating and A/C provider to have your ducts cleaned. It is also common to smell burning dust when you turn on your heating system after weeks of inactivity. Dust can build up in your ducts, and become ignited when you turn the heating system on. The burnt dust smell should only linger around for a couple of hours. If you smell rotten eggs or sulfur coming from your heating system, you might have a gas leak, but natural gas contains additives to give it a distinct smell to alert people of it’s presence. If you smell sulfur or rotten eggs coming from your heating system, you should turn off your heating system, and contact your Heating and A/C provider immediately.

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