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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 3, 2022
Great service and great people to deal with, from sales to installer. I highly recommend this company.
Apr 28, 2022
Twintech replaced our aging furnace and air conditioner recently. I highly recommend this company. Their quote was competitive, they were on time and respectful of our home and extremely professional. From the salesman to the installers and the owner who followed up afterward to ensure we were satisfied, we are very pleased with the service. We are looking forward to working with this company for all of our HVAC needs for the years to come. Excellent workmanship and service!
Apr 28, 2022
We wanted to get our AC replaced as it was 22-years old and added to this our furnace was costing more and more to repair. So, we decided to get both the furnace and AC replaced.
After going through a few quotes and product reviews we decided to go with Twintech. The three-men crew arrived early in the morning, wasted no time and got to work right away. By 2:00 pm, they were all done. Ive found their work to be top notch and they were completely professional. I had all my questions answered to my satisfaction both during the progress of their work and at end.
I have pleasure in recommending Twintech to anyone who is looking to get their furnace or Ac replaced
Nathan S.
Apr 28, 2022
Our air conditioner died On a Saturday and within hours Dave came out to take a look and discuss replacement/repair options.
The new air conditioner was installed on the Wednesday. The new unit was installed quickly. The installers were friendly and cleaned up afterwards.
We noticed a slight leak around the furnace that night and they came out the next day and fixed the issue. It has been working great and is quieter than our previous unit.
Very satisfied and would highly recommend TwinTech.
Apr 28, 2022
I contacted TwinTech to replace my 20-year old A/C. Dave, their service rep, promptly replied and was at my home within 2 hours. He was friendly and knowledgeable and didn't try to upgrade or oversell their A/C units but suggested the best fit for my small 1000 feet bungalow. Although this was during a heatwave and very busy, they were able to fit me in 2 days later. The TwinTech crew installed a 1.5 ton Ducane A/C unit that is now running smoothly while maintaining a constant cooling temperature. The crew were very courteous, professional and efficient and I will definitely recommend TwinTech to family and friends. I much appreciated your great service.
Nancy M., Oshawa
Apr 28, 2022
We had a great experience. The guys who installed our a/c did a nice job. Cleaned up.
Apr 28, 2022
excellent crew, fast and efficient! Would call them again when I need a new furnace.
Apr 28, 2022
Professional, courteous and efficient, dont need to say more than that! Use them you will not regret it.
Apr 28, 2022
TwinTech was a pleasure to deal with from the estimate through installation. We replaced a 28 year old a/c unit with one recommended by TwinTech's sales representative Dave who took the time to go over the product with us and answer any questions. The warranty is for 10 years parts and labour and they will complete the registration for you. Installation was by Greg (owner) and Mitch and Spencer who were quick and efficient and left everything clean and tidy.
Apr 28, 2022
Very professional, from the sales consultation and inspection to the final installation. Met every expectations we had for the job. A local business with great client support. We highly recommend. Twintech is a blue chip! Thanks!
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