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Does My Furnace Have Vent Issues?
Posted On: February 5, 2025
If you're experiencing issues with your furnace, venting problems could be a potential cause. Here are some signs that your furnace may have vent issues:
Signs of Furnace Venting Problems
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Soot or Discoloration Around Vents – Black soot or stains near your furnace or vents may indicate incomplete combustion, which can be dangerous.
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Unusual Odors – A strong or musty smell from the vents can suggest improper ventilation or a blockage.
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Condensation Buildup – Excess moisture around windows, vents, or the furnace itself could be a sign of poor venting.
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Carbon Monoxide Alarm Triggered – If your CO detector goes off, shut down your furnace immediately and call a professional. This could indicate a venting failure, leading to carbon monoxide buildup.
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Weak Airflow from Vents – If air isn’t circulating properly, there may be a blockage or obstruction in the ventilation system.
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Pilot Light Issues (For Older Furnaces) – If the pilot light is frequently going out or burning yellow instead of blue, it may be a sign of poor ventilation.
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Unexplained Health Symptoms – If people in your home experience headaches, dizziness, nausea, or fatigue, it could indicate carbon monoxide exposure due to venting issues.
Common Causes of Vent Issues
- Blocked or Damaged Flue Pipe – Debris, animals, or corrosion can obstruct airflow.
- Improperly Installed Vents – Incorrect angles or poor connections can restrict exhaust flow.
- Clogged Air Filter – A dirty filter can reduce airflow and strain the system.
- Malfunctioning Exhaust Fan – The fan may not be pulling combustion gases out efficiently.
- Ice or Snow Blockage – During winter, outdoor vents can become obstructed by ice or snow.
What to Do If You Suspect Vent Issues
- Check for Blockages – Inspect exterior vents and remove any debris.
- Test Your CO Detector – Ensure it’s working properly and replace batteries as needed.
- Schedule a Professional Inspection – An HVAC technician can diagnose and fix any venting problems safely.
- Change Your Air Filter – Regularly replace filters to improve airflow and efficiency.
Venting issues can be serious, so if you suspect a problem, address it promptly to ensure safety and efficiency.
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See What Our Customers Are Saying:
May 16, 2021
Appreciated a quick response to my request. Dave and Greg were very professional and made the experience seamless.
Feb 1, 2021
Very professional through the entire process. Installation and removel was done on a sloppy winter day, they put down runners on the floors and stairs and when they left, there wasn;t any sign of someone being in our house. Furnace works great as promised.
Feb 1, 2021
Dave was very pleasant to deal with and Twintech responded quickly when our furnace needed to be replaced ASAP. Installation was done on time and the crew were neat and tidy. We now have a great furnace that suits the needs of our family.
Feb 1, 2021
When your furnace kicks in over the holidays and you're not sure where to turn.. I'm so thankful that this company returned my phone call. I appreciated their transparency and clarity which allowed me to make an informed decision. With various quotes thrown at you, it can be difficult to make the right decision and trust the solutions offered by different companies. TwinTech spoke the truth and delivered on their word. Neat, timely and clean service; the peace of mind I needed during a very cold holiday season. I highly recommend them!
Feb 1, 2021
Pulling a old unit out and installing a modern heating system! Required drilling holes in the wall for the newer pipes. We went from 70% (I am willing to bet it was far less due to lack of maintenance and just old) to 96% newer . It now feels warmer and more pressure and we use to run extra heaters and feel as though they are not necessary!
Feb 1, 2021
I received three quotes before deciding to choose Twintech. Dave's prices was much more reasonable than the competitors. I most appreciated their honest recommendations. Others tried to oversell their products and services. Thank you Dave!
Feb 1, 2021
They had the best price and did a great job on the installation. Recommend them to anyone.
Feb 1, 2021
It was a amazing and professional high quality job
Friendly and very helpful representatives
Thank you for understanding my concern
And explain very well
Overall we pleased with your service
Tanks
May 15, 2020
My 19 year old furnace stopped working when the cold weather hit in November, and I was left without heat. I interviewed several companies and found TWINTECH HEATING and COOLING to be very knowledgeable, quick to respond to my inquiries and very competitively priced.
Dave provided all of the information and pricing ahead of time and set up the appointment for the installation. Greg and Mitch arrived on time to do the installation and worked quickly and efficiently to complete the job.
After the completion of the installation, Dave followed up to ensure that everything was working well and that I didn't have any concerns.
Overall, this was a low-stress and flawless experience from start to finish. I would highly recommend TWINTECH HEATING and COOLING to anyone that requires a new furnace.
May 14, 2020
Our 20 year old furnace broke down during the first cold weekend this past November and our usual HVAC company never returned our phone call. Their loss, missing out on a sale since we didn't want to spend much fixing an old furnace and our 40 year old air conditioner was also long overdue for replacement. We proceeded in obtaining three different quotes for furnace and air conditioner replacement, and proceeded with the one we received from Twintech.
Dave was friendly, knowledgable and accommodating to our schedule and provided with us with a price that fell in the middle of the three quotes that we had. We felt that the Amana furnace and air conditioner he quoted us on were the best products and value offered to us and felt most comfortable with the professionalism and reputation of Twintech.
Greg, Grant and Mitch were at our house for installation the day after we decided to proceed. The guys were friendly and informative, the job was completed efficiently and workmanship appears excellent. Our house is certainly much more comfortable with the new two-stage variable speed Amana furnace compared to the old clunker! And, we're looking forward to enjoying the new air conditioner once summer rolls around again. Thanks Twintech!
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