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Why is My Furnace Not Heating Properly?
Posted On: October 29, 2023
However, here are some common reasons why a furnace may not be heating properly:
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Thermostat Settings:
- Check if the thermostat is set to the desired temperature.
- Ensure that the thermostat is set to the "Heat" mode.
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Clogged or Dirty Filters:
- A dirty or clogged air filter can restrict airflow, reducing the efficiency of the furnace. Replace or clean the air filter regularly, typically every 1-3 months.
-
Pilot Light/Ignition Issues:
- If your furnace has a pilot light, ensure it is lit. For newer models with electronic ignition, check for error codes or ignition issues.
-
Gas Supply Issues:
- Verify that the gas supply to the furnace is turned on. If you suspect a gas supply issue, contact a professional immediately for assistance.
-
Thermocouple Problems:
- A faulty thermocouple may cause the gas supply to the furnace to be shut off. This is a safety feature to prevent gas leaks. A technician can check and replace a faulty thermocouple.
-
Burner Issues:
- Dirty or malfunctioning burners can affect the heating efficiency. If the burners are not lighting or staying lit, it may require cleaning or adjustment.
-
Blower Motor Problems:
- If the blower motor is not working correctly, it can result in inadequate heat distribution. Check for unusual noises or lack of airflow.
-
Ductwork Issues:
- Leaks or blockages in the ductwork can reduce the efficiency of your furnace. Inspect the ducts for any visible issues.
-
Dirty or Blocked Vents:
- Ensure that all vents and registers are open and not blocked by furniture or other obstacles. Clean any dust or debris around the vents.
-
Electrical Issues:
- Check for tripped circuit breakers or blown fuses in the electrical panel that powers the furnace.
If you have checked these common issues and your furnace still isn't functioning properly, it's recommended to contact a licensed HVAC professional to diagnose and address the problem. Working with gas appliances and furnaces can be dangerous, so it's crucial to prioritize safety and seek professional assistance when needed.
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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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