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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:
Jul 28, 2022
On coldest night of the year our furnace quit. At 8:40 in the morning Greg arrived and gave us a diagnosis and a recommendation. By 2:30 we had a new furnace and were warm again. Great company. Great customer service. Good reasonable price.
Peter, Pickering
Jul 3, 2022
Twin tech team was very efficient and prompt. They provided a quote within hours of request and got the job done on time. No disruption to home function. We would highly recommend this team. Job well done.
Jul 3, 2022
Our furnace bit the dust, and Twintech came out to troubleshoot and diagnose the problem within a couple of hours. Mitch was super helpful, patient, and answered all of our questions. When we decided to get the furnace replaced, the crew was over first thing the next morning and did a fantastic job. Not only did they complete the job in a few hours, but they cleaned up and respected our house as they went, and answered all of our follow-up questions. I've used Twintech for our HVAC needs in the past and will continue to do so. I'd recommend them to anyone, and it feels good to support a local, family-owned business.
Jul 3, 2022
Dave and the Twintech team were fabulous from day 1 and helped us through the process to identifying a new furnace and AC unit. This was our first time through this process and Dave did a thorough job explaining all the components and was very patience answering all our questions. Dave provided great insights and fair pricing.
The Twintech team did an awesome installation. Very clean and efficient. I would highly recommended their service.
Jul 3, 2022
We had a new Amana furnace installed by Twintech and we were very pleased with the installation. It is nice to have a warm house again.
Jul 3, 2022
Excellent job. Excellent service. Competitive price. Its rare to find a company with the knowledge and professional results we have experienced with Twintech. The clean and neat installation with attention to detail and drop sheers to respect our property is a clear indication of Twintechs high level of integrity. The 1-1/2 gas line upgrade they did for our pool 3 years ago was awesome. Can't say enough. Thank-you Twintech.
Jul 3, 2022
Twitch did a great job with the installation of our new furnace. I really appreciated their honesty and I could trust what they were telling me. Another company tried to suggest significantly more work at a greater cost claiming it was necessary to meet current building code. Twintech is very fair. All staff I meet were friendly, polite and trustworthy. I would recommend Twitch for a furnace.
Jul 3, 2022
This is a professional team that's easy to deal with. I would strongly recommend them
Jul 3, 2022
Very professional firm from start to finish!
They removed the old oil tank and furnace. They installed air conditioning and a new propane furnace.
Professional installation, on time and no mess.
Very pleased with their work and would highly recommend the company. Our house is three stories so they spent the time to do all the calculations to make sure we would have great performance on each floor.
Thank you again!
Jul 3, 2022
Upon a routine yearly maintenance, it was discovered there was a leak in the heat exchanger and a I needed a new furnace. I know nothing about these things and was completely stressed out. The company I had the maintenance plan with quoted me a huge number to rent a furnace, I just wanted to cry. Then I spoke to Dave at Twintech. He was so knowledgeable and calming, provided me a fair quote and within a few days I had an amazing crew show up to my house and install my new energy efficient furnace! I have already recommended these wonderful people at Twintech to a good friend of mine. Thank you Twintech!!
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