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Why is My Furnace Not Heating Properly?

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Why is My Furnace Not Heating Properly?

Posted On: October 29, 2023

Why is My Furnace Not Heating Properly?

However, here are some common reasons why a furnace may not be heating properly:


  1. Thermostat Settings:


    • Check if the thermostat is set to the desired temperature.
    • Ensure that the thermostat is set to the "Heat" mode.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. Ductwork Issues:


    • Leaks or blockages in the ductwork can reduce the efficiency of your furnace. Inspect the ducts for any visible issues.
  9. 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.
  10. 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:

by Private User on Twintech Heating and Cooling

Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
Thank you for a job well done.

by Darren, Pickering on Twintech Heating and Cooling

My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.

by Private User on Twintech Heating and Cooling

I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.

by Robert, Ajax on Twintech Heating and Cooling

We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.

by John Armstrong, Pickering on Twintech Heating and Cooling

I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !

by Private User on Twintech Heating and Cooling

Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.

by Bill Edmondson on Twintech Heating and Cooling

Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.

by Private User on Twintech Heating and Cooling

A dear late cousin of mine recommended this company and I have been happy with the service.

by Private User on Twintech Heating and Cooling

We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.

by W1n5t0n1987! on Twintech Heating and Cooling

Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!

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See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

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.

by Linda on Twintech Heating and Cooling

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!

by Robert Rogers on Twintech Heating and Cooling

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.

by Robert Mizuno on Twintech Heating and Cooling

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!

by Ruth on Twintech Heating and Cooling

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!

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