Identifying 4 Common Furnace Odors

Cold weather has arrived in New England! It’s time to make the switch from cooling to heating. The first time you turn on the furnace after a scorching hot summer, you may notice some unusual smells. What do they mean and which are causes for concern?

We explain four common furnace odors.

Something’s Burning

When we turn our heaters on for the first time after months of rest, it’s common to experience a burning smell. The components are likely covered in dust and it will take a few times running for the system to regulate. While a burning smell is usually not a cause for concern, contact an HVAC professional if it does not go away after a few hours or returns later in the heating season.

A continual burning odor could indicate a few issues, including:

• Overheating: This could be the result of a clogged air filter that makes the system work twice as hard or an overheated metal component.
• Electrical Problems: A failing blower motor could be one cause. Electrical issues present a fire hazard and should be addressed right away.
• Older Parts: When rubber and metal components experience wear and tear, they can start to burn when it comes time for replacement.

Something’s Rotten

Many homeowners compare this smell to rotten eggs or sulfur – an unpleasant odor no one wants in their house. While the smell is foul, you can almost always be sure the furnace is the cause – and you’ll want to address it right away.

The smell of rotten eggs usually indicates your furnace has a gas leak. As soon as you detect the scent, turn off the furnace, open the windows for fresh air and call the gas company to avoid a sudden fire or explosion.

Something’s Dirty

Another common furnace smell is reminiscent of a locker room: Imagine dirty socks and sweaty equipment throughout your home. The locker room smell typically indicates that the system needs a good cleaning. Oftentimes, condensation builds on the heating coils and can cause bacteria to grow. These coils, the air ducts and air filters should be regularly cleaned to avoid this dirty smell.

Something’s Musty

A musty smell is typically not a cause for concern. Much like the burning smell that permeates your home when the furnace is first turned on, the recently dormant system has dust to burn off. This is a normal occurrence, but you can combat the scent by cleaning the air ducts and air filters often. Specifically, bring in the professionals prior to the start of the heating season for an inspection and thorough cleaning.
 
Heating season is officially here! If you experience any of these strange smells or need regular system maintenance, schedule an appointment for service with M.J. Fahy & Sons today.