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Why Does My Furnace Smell?
Posted On: October 31, 2024
If your furnace has an unusual smell, it could be caused by a variety of issues. Here’s a breakdown of common furnace smells and what they might mean:
1. Burning Dust Smell
- Cause: If the furnace hasn’t been used for a while (like at the start of winter), dust will often accumulate on the heating components. When the furnace is turned on, the dust burns off, producing a distinctive smell.
- Solution: This is usually normal and should go away within a few hours. If it persists, replace or clean the air filter and vacuum around the furnace.
2. Musty or Mildew Smell
- Cause: Moisture can build up in the ductwork, leading to mold or mildew growth, especially if the furnace hasn’t been used in a while or if there is a humidity problem.
- Solution: Have a professional inspect and clean your ductwork. Consider using a dehumidifier in your home to control moisture levels.
3. Electrical or Metallic Burning Smell
- Cause: An electrical or metallic smell can indicate overheating of furnace components, often caused by worn-out parts, faulty wiring, or even a blower motor that is burning out.
- Solution: Shut off the furnace and call a technician, as electrical issues can be hazardous.
4. Rotten Egg or Sulfur Smell
- Cause: This smell typically indicates a natural gas leak, as utility companies add a sulfur-like odor to natural gas to make leaks easier to detect.
- Solution: Turn off the furnace immediately, leave your home, and contact your gas company or emergency services.
5. Oil or Smoky Smell
- Cause: If you have an oil furnace, a smoky smell could indicate incomplete combustion or an oil leak. It may also happen if the air filter or burner is dirty.
- Solution: Shut down the furnace and have it inspected, as burning oil or smoke can cause health issues.
6. Chemical Smell
- Cause: A chemical odor could indicate a cracked heat exchanger, which might allow carbon monoxide to leak into the air.
- Solution: This is a serious issue. Turn off your furnace, open windows, and have a professional inspect it right away.
Preventive Tips
- Change air filters regularly (every 1 to 3 months).
- Schedule an annual furnace tune-up to ensure safe and efficient operation.
- Check for any obvious blockages or leaks around the unit.
If you’re unsure about the smell or if it persists, calling a professional HVAC technician is the safest option.
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See What Our Customers Are Saying:
Aug 23, 2022
It was a refreshing experience interacting with the Twintech team. From Bob, the sales consultant, who articulated in layman's terms all the options available and reasons for making any selection. This was done without the prevailing pressure tactics so commonplace today.
Before proceeding Mitch, the technician, at our request conducted a service check on our 30 yr old furnace. His report was positive indicating no urgency to replace it. Again no pressure tactics.
Three days after first meeting with Bob, the installation team of Greg and
Spencer completed the installation within the planned time frame.
A very professional, courteous and transparent team which delivered on their promise. I highly recommend Twintech.
Aug 22, 2022
Initial contact with sales resulted in an immediate response, which led to a timely installation. Both sales and installers were all very professional. I have no hesitation in recommending TWINTECH.
Aug 21, 2022
I had a great experience with TwinTech. The company offered a reasonable quote, and performed a quick and clean installation. The installer Greg was experienced, professional and courteous. He explained the services he performed and gave recommendations on maintain the new furnace.
The salesman Bob was honest
and professional and educated me on how to achieve optimal performance.
All communication from them was quick and they came the following day. I was pleased with the service and would recommend them.
Aug 20, 2022
From quote, to installation, to follow up, Twintech provided excellent service. I would highly recommended their services.
Aug 19, 2022
I had a really great experience with these guys. The salesman Bob was clearly very knowledgeable about everything to do with heating and cooling a home, spent a lot of time with us going over the details of the job, never rushed us and came back after the install to make sure we were happy. The installation crew was excellent, they covered the floors all the way from outside down to the basement furnace room, kept the place clean, got the work done on time and were very friendly. Ive got 15 years in the contracting/ construction industry and these guys are one of the most professional companys Ive dealt with. Great company!
Aug 18, 2022
Had great service and clean-up was good. Was happy with my salesman. They were very friendly and helpful. I needed a new furnace as our was over 20 years old. The furnace and air-conditioner work great and they are very quiet. I am very pleased with the service and product I received.
Aug 17, 2022
Met with Dave for the sales process and he was great about explaining and going over everything to us. The install happened very quickly and the team were super professional and friendly. We are very happy with this company and their services and we definitely recommend them to others. Thankful my sister recommended them to me!
Aug 16, 2022
Reviews for Twintech were good, and they did not disappoint. After an initial visit to discuss the suitable AC unit for replacement, an installation date was available in just a couple of days, and everything was installed without a hitch. Highly recommended
Aug 16, 2022
Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
Thank you for a job well done.
Aug 15, 2022
My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.
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