Have you recently had a new furnace put in and are now experiencing a weird smell? You’re not alone, because many other homeowners also have this happen at first. Let’s review what’s creating this smell, and when you can look forward to it to disappear, as well as three other furnace smells you shouldn’t ignore.

Why Your New Furnace Smells

There are two reasons why a new furnace might smell.

Protective Coating

Your furnace has a special finish on specific parts to keep them from rusting. This may include the heat exchanger, which safely removes gases including carbon monoxide naturally produced during the heating process.

When your furnace runs for the first couple of times, the coating may release a burning smell. This is standard and the smell should go away the more your furnace heats.

To be on the safe side, you’ll want to connect with a heating and cooling company if the smell continues. A burning smell that remains can mean the motor is too hot or there’s an electrical problem, among other problems.

Dust

Dust builds inside your furnace when it’s idle in warm weather. That dust will burn off when you flip on your furnace in the fall, creating a burning smell. This smell should disappear within a few minutes.

One way you can lessen or prevent this smell is by having furnace maintenance done each year. This is needed to keep your valuable manufacturer’s warranty good, plus it keeps your furnace clean and ensures it will run properly during the upcoming heating period.

3 Other Furnace Smells You Shouldn’t Ignore

While it’s less common for a new system to require furnace repair, it happens. Here are three other odors you should keep an eye out for and what they might mean.

  1. Burning plastic or rubber. If your furnace smells like burning plastic, you might have an electrical issue. Electrical wiring is covered in plastic to prevent shocks, and this smell is a signal that heat is melting this protective coating. To prevent a fire, turn off your furnace right away and have it checked out by an HVAC technician.
  2. Gas or rotten eggs. Gas companies add sulfur to natural gas to warn you when there’s a leak. If your furnace smells like gas or rotten eggs, shut it off right away, evacuate your home and contact 911. Exposure to natural gas can make you ill, plus it’s highly flammable and explosive.
  3. Musty. If your furnace smells musty, you might have mold and mildew growing in your ductwork. We suggest having your ductwork inspected and cleaned if necessary.

Now that you understand which furnace smells are normal and which ones aren’t, you’re ready to take care of your new furnace. If you’re worried about a weird odor, our Morgner Inc. Air Conditioning & Heating HVAC technicians can assist you. Give us a call at 314-262-4541 to schedule your appointment right now. We supply quality, affordable furnace repair in Saint Louis and surrounding communities.