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Simple Troubleshooting For Your Furnace
Posted On: October 1, 2024
Here’s a straightforward guide for troubleshooting your furnace:
1. Check the Thermostat
Ensure your thermostat is set to “heat” and the temperature is higher than the current room temperature. If it's battery-operated, check the batteries as well.
2. Inspect the Furnace Switch
Locate the power switch, which often looks like a regular light switch near your furnace, and make sure it’s in the “on” position.
3. Check the Circuit Breaker
If the furnace isn’t turning on, check your home’s electrical panel for a tripped circuit breaker. Reset it if necessary.
4. Change the Air Filter
A clogged filter can restrict airflow, causing your furnace to overheat or not work efficiently. Replace it if it’s dirty or clogged.
5. Ensure Proper Airflow
Make sure that your air vents are open and not blocked by furniture or other items. Proper airflow is key to keeping your furnace running smoothly.
6. Inspect the Pilot Light or Ignition System
If your furnace uses a pilot light, ensure it’s lit. If you have an electronic ignition system, check the furnace manual for reset instructions.
7. Check for Gas Supply
Ensure the gas valve to the furnace is open. If you smell gas, turn off the furnace immediately and call a professional for assistance.
8. Examine the Furnace Flame
If the flame is yellow or flickering instead of blue, this could indicate a problem with combustion. Call a professional if this occurs.
9. Look for Error Codes
Many modern furnaces have a diagnostic system that will flash error codes if something’s wrong. Check the manual to decode any lights or beeps.
10. Call a Professional
If these steps don’t resolve the issue, it’s best to call a certified technician for a more thorough inspection and repair.
Regular maintenance, such as cleaning the furnace and replacing filters, can also prevent many of these issues from arising.
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See What Our Customers Are Saying:
Aug 8, 2025
We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.
Aug 8, 2025
Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!
Feb 18, 2025
Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.
Feb 18, 2025
We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!
Feb 18, 2025
TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!
Feb 18, 2025
Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!
Feb 18, 2025
Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.
Aug 17, 2024
I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. Ive used the company in the past for my furnace so I was happy when I recognized Greg at my front door. Hes great and the service is always top notch. Id highly recommend using twintech for honest, superior service in the Durham region. Thanks!
Aug 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Aug 12, 2024
Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!
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