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There are few Georgians that don’t love coming home to the scent of a freshly baked pecan pie. There are also few Georgians that do love coming home to mysterious smells coming from their heating system. Thing is, some of those smells can be a sign of real danger.

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When it comes to your heating system, there are a few smells you should be pretty concerned about.

Scary Smells Coming from Your Heating System

Electrical Burning

More likely than not, electrical burning smells are the result of overheated metal components. When certain parts of your heating system overheat, the wires inside your unit can get singed and produce ill-smelling odors.

Since this problem can result in your unit shutting down or even a fire, you should have your heating system inspected by a professional.

Rotten Eggs

A rotten egg or sulfur smell is almost always a sign of a gas issue. If you think your natural gas furnace has a potential gas leak, you should call your HVAC technician to inspect it right away. Not only can gas leaks cause dangerous fires, but breathing in the gas can result in some serious health issues.

Dirty Socks

If you’ve ever played a sport, you know how dingy and musty a locker room can smell. If you’re getting that same smell from your heating system, it could be because there is bacteria buildup on your heating coils. This is typically caused by the coils changing different temperatures during fall and spring, allowing bacteria to grow.

Luckily, this can usually be fixed by giving your system a good cleaning to remove any bacteria and other debris.


Your heating system could give off a smokey smell for a few reasons. If your unit is in your basement near storage boxes, some items could end up too close the furnace and could melt or get burned. Smoke smells can also be caused by improper oil ignition or a slight oil spill.

If these smells persist, call your trusted HVAC tech for help.

Solve Smells with Casteel

If you’re not sure what is causing the odd smells from your heating system, ask the experts at Casteel for help. Not only are we fully licensed, bonded, and insured to perform any heating repairs, we also have over three decades of experience under our belts. This allows us to repair your system quickly and leave you with long-lasting results.

For more information, give us a call at 855.908.4203.