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How Do I Know My Furnace is Safe?
Posted On: February 14, 2025
Ensuring your furnace is safe is crucial for both your comfort and well-being. Here are some key indicators that your furnace is operating safely and efficiently:
1. Regular Maintenance and Inspections
- Schedule annual professional inspections to check for potential issues.
- A technician can clean components, test for leaks, and ensure the system runs efficiently.
2. Check for Carbon Monoxide Leaks
- Install carbon monoxide (CO) detectors near sleeping areas and around your furnace.
- Yellow or flickering burner flames instead of blue flames could indicate incomplete combustion, which may lead to CO production.
- Symptoms like headaches, dizziness, or nausea when the furnace is running may indicate CO exposure—turn it off immediately and seek help.
3. Ensure Proper Ventilation
- Check that your furnace’s vents and air intake pipes are clear of debris like snow, leaves, or nests.
- Blocked vents can cause dangerous gases to build up in your home.
4. Listen for Unusual Noises
- Loud banging, whistling, or rattling sounds could indicate issues like gas buildup, a loose part, or airflow restrictions.
- A constant humming or high-pitched screeching could suggest blower motor or belt problems.
5. Monitor for Gas Leaks
- If you smell rotten eggs (natural gas odor), turn off the furnace, leave the home, and call the gas company immediately.
- A professional should inspect and repair any gas leaks before using the furnace again.
6. Keep the Area Around the Furnace Clear
- Do not store flammable materials like paper, chemicals, or furniture near the furnace.
- Ensure at least a 3-foot clearance around the furnace to allow for proper airflow and safety.
7. Change the Air Filter Regularly
- A clogged filter restricts airflow, causing the furnace to overheat and work harder, increasing the risk of failure.
- Change filters every 1-3 months, depending on usage and the type of filter.
8. Monitor Energy Bills
- A sudden spike in energy costs may indicate the furnace is running inefficiently due to leaks, clogged filters, or failing components.
9. Test the Thermostat
- Ensure the thermostat is responding correctly to temperature changes.
- A malfunctioning thermostat could cause overheating or inefficient operation.
10. Check the Heat Exchanger
- A cracked heat exchanger can leak carbon monoxide into your home.
- If you notice soot buildup or a strong burning smell, have a technician inspect the system.
When to Call a Professional
- If you notice any gas leaks, CO detector alarms, or unusual furnace behavior, turn off the system and call a professional HVAC technician immediately.
Regular maintenance and vigilance will help ensure your furnace remains safe and efficient.
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See What Our Customers Are Saying:
Sep 6, 2018
Honest, very personable , men of their word ,workmanship xcellent ,showed up when promised ,They do not try to up sell ,rather give good advice instead . Price was very fair in my opinion .We have a family member with a medical condition and I think they made us a priority .Very happy with these guys . (Nice guys ) Stu Leffler Ajax.
Sep 5, 2018
Very professional, courteous, knowledgeable staff. Sales staff (David Gergley) excellent in knowledge and getting the job setup and installation was very prompt. Greg and Peter (technicians) knew their stuff and stuck around after completion to make sure it all worked properly and that I understood how it all was installed and how the unit worked. Would highly recommend them! Thanks for a great job-house is now cool and comfortable.
Sep 4, 2018
I had Twintech install a brand new air condition back in June of this year and I'm very happy with their service. I have a very busy schedule so I sent out an email to 7 or 8 HVAC companies just to get an idea of what it would cost. Dave at Twintech and only one other company were able to give me an approximate quote through email. Many of the companies I reached out to didn't even respond. I decided to meet with Dave and he was very friendly and professional. He gave me a good quote for a name brand/energy efficient AC with installation from their certified technicians. It was an easy decision to go with them.
Within a week I had the unit installed and working perfectly. Their technicians were very helpful and answered all of my questions. I'll definitely be calling them back for all of my HVAC needs in the future.
Oct 9, 2018
The people from Twintech were very friendly and personable...from the salesman to the installers. The installation was done as scheduled. I love my new air conditioner. My neighbour has a York and that thing is so noisy compared to my Goodman!! Thanks Twintech!!
Sep 5, 2018
Thank you, Twintech. They installed an A/C in my home in the middle of a heat wave which we appreciated very much. I found the team good, not overly friendly, other than the brothers. Dave, the salesperson was awesome, and, it's because of him that I was sold on using Twintech. I had other questions about additional work I am curious about and would have liked them to follow up and provide a quote. Other than that, which ultimately is not related to the great work they did, I would definitely recommend them, although I don't believe they go outside of Durham (check with them).
Aug 4, 2018
We have used this company a few times so I can't remember exactly what we paid but I do know that their fees are always very reasonable.
The first time we called Greg was when our furnace conked out while we were away. He came right away, showed me the problem and fixed it immediately.
The second time was when we needed an air conditioner moved and lifted to a platform. Again, he showed up on time, completed the job quickly (including a new gas line) and the fee was very reasonable.
We have received a quote from Greg to replace the air conditioner and furnace and when we are ready to move ahead, we will be calling him.
I have no hesitation in recommending TwinTech!
Jul 19, 2018
Our rating for Twintech is 5/5 stars. They are very professional and efficient, and the transparency they maintain right from the preliminary assessment till the day of the work is a testament to their experience in the field. We had Twintech replace our air conditioning and furnace, and we appreciate the efforts taken by Greg.
Apr 30, 2018
After 18 years my Air conditioner died in the middle of a heat wave. I entered my information on Home Stars and within the hour Dave from Twin Tech responded and offered to meet me as soon as possible depending on my availability. Dave was very knowledgeable about the products Twin Tech offered and even though this was the first quote I received . I felt very comfortable in giving Twin Tech my business. maybe it was the professional approach. Needless to say that the crew with Greg and Grant arrived promptly at the time they committed to were very professional and within a few hours had the place cool. They cleaned up and one would never know that I had work done . I know that the System is new and I probably wont need to worry about it for some time. However with the professionalism displayed by the crew I feel assured that should I need to call for service Twin Tech will respond. I also know that should I need a new Heating system I will go with Twin Tech. Keep up the good work.
Apr 30, 2018
Greg and team were amazing! All interaction via email and text 100% professional. From consult to product recommendation their service was phenomenal!
Installed a Napoleon furnace (ecm dc drive variable 2-stage) and it was a game changer for the whole house. Blended air temperature through and through the entire house and its saving us money by cutting down our utility bill by ALOT!
Jun 18, 2018
We purchased a new cooling & heating system from Twintech and the team was fantastic. From sales to installation, the team were great to work with. Friendly (our dog even enjoyed having them over), professional and accommodating. Id recommend Twintech in a heart beat to anyone. Superb customer service.
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