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Why is My Furnace Heating Inconsistently?

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Why is My Furnace Heating Inconsistently?

Posted On: December 23, 2024

Why is My Furnace Heating Inconsistently?

Inconsistent heating from your furnace can be frustrating, especially during colder months. Here are some common reasons your furnace might not be heating evenly or consistently:


1. Clogged or Dirty Air Filters

  • Problem: A dirty filter restricts airflow, causing uneven heating throughout your home.
  • Solution: Replace or clean the air filters regularly, typically every 1-3 months, depending on usage.

2. Thermostat Issues

  • Problem: A malfunctioning thermostat might misread temperatures or fail to communicate with your furnace effectively.
  • Solution: Check the thermostat’s settings and batteries. If issues persist, consider recalibrating or replacing the thermostat.

3. Blocked or Leaky Ductwork

  • Problem: Air ducts that are blocked, leaking, or poorly insulated can prevent warm air from reaching certain areas of your home.
  • Solution: Inspect ducts for obstructions or damage. Seal leaks and ensure proper insulation.

4. Incorrect Furnace Size

  • Problem: A furnace that is too small for your home may struggle to heat all rooms evenly. Conversely, an oversized furnace may short-cycle, causing uneven temperatures.
  • Solution: Have a professional HVAC technician assess your furnace size and capacity.

5. Aging Furnace

  • Problem: Older furnaces may lose efficiency over time, resulting in inconsistent heating.
  • Solution: Schedule a professional inspection to determine if repairs or replacement are necessary.

6. Faulty Blower Motor

  • Problem: A malfunctioning blower motor may not distribute warm air effectively throughout your home.
  • Solution: Have an HVAC professional inspect and repair or replace the blower motor if needed.

7. Dirty Burners

  • Problem: Dirt or debris on the burners can lead to incomplete combustion and uneven heating.
  • Solution: Regular maintenance and cleaning of the furnace burners can prevent this issue.

8. Drafts or Poor Insulation

  • Problem: Cold drafts or poorly insulated areas can cause temperature fluctuations, even if the furnace is functioning correctly.
  • Solution: Seal windows and doors, and improve insulation in areas where heat loss is occurring.

9. Zoning Issues

  • Problem: Without proper zoning, some rooms may receive more heat than others, depending on the layout of your ductwork and vents.
  • Solution: Consider adding a zoning system to better control the heat distribution in your home.

10. Pilot Light or Ignition Issues

  • Problem: An intermittent pilot light or faulty ignition system can cause the furnace to cycle erratically.
  • Solution: Have the ignition system inspected and repaired by a qualified technician.

When to Call a Professional

If you’ve tried troubleshooting and your furnace continues to heat inconsistently, it’s best to call a licensed HVAC technician. They can diagnose the problem accurately and recommend the best course of action to restore even heating in your home.



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See What Our Customers Are Saying:

by Floreene in Whitby on Twintech Heating and Cooling

My old furnace had finally broken down for the last time when contacted twintech to have a new furnace installed…They were prompt, knowledgeable and very reasonably priced. They did such a great job i tell all my friends and family about this company.

by Damien McIsaac. Ajax on Twintech Heating and Cooling

To whom it may concern, I recently had TwinTech (Greg and Grant Dainty) replace my furnace and service both my gas fireplaces and air conditioning unit. They were professional, courteous and very fair in their pricing. I would gladly recommend TwinTech to anyone needing work done. I can be contacted at 905-626-XXXX.

by Blair N. - Toronto on Twintech Heating and Cooling

My Fiancé and I have relied on Twintech Heating and Cooling now for the better part of the last 10 years. In that time, Greg has installed a furnace, an air conditioner, and a heat-pump at our residence in Toronto. In each instance Greg and his team were a pleasure to deal with. They were courteous and professional throughout the whole process and the quality of their work is first rate. Our experiences have always been extremely positive and we have referred his services numerous times to our friends and family. Without hesitation, I would recommend Greg and TwinTech Heating and Cooling to anyone looking to service or replace their existing heat/AC equipment

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See What Our Customers Are Saying:

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!

by Anna Chin on Twintech Heating and Cooling

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!

by Connor Agnew on Twintech Heating and Cooling

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.

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