Common Causes of a Burning Smell From Your Furnace & What You Should Do

Your furnace is one of those home comfort units that you don’t often think about – that is, until something goes wrong. You set your thermostat and expect this complex system to operate efficiently. And most of the time, it does. But there can sometimes be signs that something isn’t working properly, like the sudden onset of a strange odor.

Addressing unusual smells from your furnace is important. While some mild burnt odors can be a normal byproduct of burning off dust, particularly during the first use of the season, others can be an indication that something more serious needs to be addressed. Today, we’ll explore various types of smells that might emit from your furnace and describe the potential causes.

Why Is There a Burning Smell Coming From My Furnace?

If you’re wondering why your furnace smells funny, one of the first questions we might ask is, “Is this the first time you’ve turned on your furnace this year?” When turning on the furnace for the first time, there can sometimes be a burnt smell. This is typically due to the accumulation of dust in the system. It should quickly burn off and dissipate after a short period.

If the burning smell persists for more than a few hours, it could point to a more serious issue related to overheating components or a clogged filter.

Here’s what to do:

• Replace the air filter.
• Schedule a furnace inspection.

My Furnace Smells Like Burning Plastic

If your furnace begins circulating an odor that smells like burnt plastic, there could be an issue related to melting wires or furnace components overheating. Because plastic debris can sometimes lodge near heated areas, you’ll immediately recognize the burning plastic smell.

It’s critical that you immediately turn off your furnace in these situations to prevent further damage and avoid potential fire hazards.

Here’s what to do:

• Power down your furnace altogether.
• Call a professional for an inspection.

There’s a Gas Smell From My Furnace

Furnaces run on oil, electricity, or gas. So, if you experience a gas smell from your furnace, it could be an indication that you have a gas leak. These furnace-related concerns can be especially dangerous and should be treated as an HVAC-related emergency. Even if your gas odor is coming from a gas valve or pilot light issue, you’ll need a professional to assess and make repairs. So, don’t wait to call.

Here’s what to do:

• Immediately turn off your furnace.
• Evacuate your home entirely.
• Call your gas company and HVAC professional immediately.

Musty Smell From the Furnace

What does it mean if you have a musty smell coming from your furnace? This type of odor is usually an indicator that mildew or mold is present. It could be lurking in your home’s ductwork or as a result of moisture buildup near the furnace unit itself.

Here’s how to prevent and address it:

• Clean and replace your furnace’s air filters regularly.
• Schedule air duct cleaning to keep your ductwork free of moisture.
• Keep up with regular furnace maintenance and tune-ups.
• Call a professional to identify any immediate moisture issues near your HVAC system.

Schedule Furnace Repair or Maintenance With Michael Bonsby

If you find yourself scratching your head, saying, “Why does my furnace smell funny?” get in touch with us. Some odors can be expected, while others are signs that something else is wrong. The best way to spot these potential issues before they become smelly problems is with routine maintenance inspections and furnace servicing.

Our skilled pros at Michael Bonsby HVAC, Plumbing & Electrical can help. We ensure the safety and efficiency of your system and stave off those stubborn odors before they occur.

Call Michael Bonsby whenever you need help or have questions about your furnace because:

• We have decades of experience in furnace repair and maintenance.
• Our technicians are licensed, bonded, and insured.
• We offer fast response times for HVAC emergencies and flexible scheduling.
• We provide upfront and transparent furnace pricing with no hidden fees.

Don’t ignore those annoying smells from your furnace! Instead, contact Michael Bonsby today for expert furnace repair and maintenance.