$49 / month O.A.C Including Install
$49 / month O.A.C Including Install

Internal Furnace Issues

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Internal Furnace Issues

Posted On: October 9, 2024

Internal Furnace Issues

When addressing internal furnace issues, it's important to recognize common problems and their potential causes. Here’s a breakdown of some key internal furnace issues and how they can be resolved:


1. Clogged or Dirty Filters

  • Cause: Filters trap dust, dirt, and allergens, but when they become clogged, it restricts airflow.
  • Effect: This can cause the furnace to overheat, reduce efficiency, and increase energy bills.
  • Solution: Regularly replace or clean filters every 1-3 months.

2. Ignition or Pilot Control Issues

  • Cause: Problems with the ignition system (electronic ignition or pilot light) can prevent the furnace from properly heating.
  • Effect: This can result in intermittent heating or the furnace not starting at all.
  • Solution: Check for loose connections, gas flow issues, or malfunctioning pilot controls. If unsure, consult a technician.

3. Blower Motor Malfunctions

  • Cause: The blower motor pushes warm air through the duct system, but wear and tear or dust buildup can affect its performance.
  • Effect: The furnace may run but won’t circulate warm air properly, leading to cold spots in the home.
  • Solution: Have the motor cleaned and serviced regularly. In some cases, the motor may need replacing.

4. Limit Switch Failure

  • Cause: A malfunctioning limit switch can prevent the blower from turning off, causing the furnace to overheat.
  • Effect: This not only increases energy usage but also poses a safety risk.
  • Solution: Have the limit switch tested and replaced if necessary.

5. Cracked Heat Exchanger

  • Cause: Over time, the heat exchanger can crack due to stress and temperature fluctuations.
  • Effect: A cracked heat exchanger can leak carbon monoxide, a dangerous and potentially lethal gas.
  • Solution: If a crack is detected, the heat exchanger must be replaced immediately.

6. Thermostat Malfunctions

  • Cause: A faulty thermostat may fail to communicate with the furnace, leading to improper heating cycles.
  • Effect: The furnace may not turn on or off at the desired temperature.
  • Solution: Check thermostat settings, replace batteries, or consider upgrading to a programmable model.

7. Dirty Burners

  • Cause: Burners that are dirty or misaligned can cause inefficient combustion.
  • Effect: This reduces heat output and can lead to safety hazards like gas leaks or carbon monoxide emissions.
  • Solution: Have a professional clean and inspect the burners.

8. Frequent Cycling

  • Cause: If the furnace frequently turns on and off, it may be due to improper airflow, thermostat issues, or an oversized unit.
  • Effect: Frequent cycling reduces efficiency and puts additional wear on furnace components.
  • Solution: Address airflow problems, check thermostat calibration, or consult an expert to ensure the furnace is appropriately sized.

Conclusion

Preventative maintenance and regular inspections can help avoid many of these internal furnace issues. Scheduling annual furnace tune-ups will ensure your system runs efficiently and safely, especially during peak usage seasons.



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See What Our Customers Are Saying:

by Jennifer in Toronto on Twintech Heating and Cooling

I had cold and hot spots all over my 70 yr old home. My furnace is quite new and Greg optimized the fan and furnace. The original installer just took it out of the box with factory settings and installed it- basically running at 50% of capacity. Greg also routed heat into my laundry room, yeah - so now I can renovate laundry room - thanks Greg. He is honest, professional and knowledgeable. I will be calling him back in the spring to optimize my AC as well.

by Happy Homeowner in Toronto on Twintech Heating and Cooling

Wonderful from beginning to end. I tend to fret and worry about home improvements but the excellent team at TwinTech put my mind as ease. They listen, they are patient and best of all ... the work they did is amazing! I chose the Goodman 80K BTU 2 stage furnace and the matching Goodman air conditioner. Greg, Grant and Poitr "Peter" arrived on time, took great care, explained everything to me and they answered all of my questions. They carefully adjusted the factory settings to optimize the furnace for my house and they also checked the duct work in the basement. Dave, the Sales Manager, came by to say "hello" and to see if I was happy. YES, I am happy with the work! The furnace is very quiet. I have it running on low just to circulate the air in the house and it's so much quieter than my old furnace. When I need new duct work for an upcoming basement renovation TwinTech will be my first choice. I highly recommend TwinTech. PS. They were even nice to my dogs.

by Les G. from Pickering on Twintech Heating and Cooling

Greg was prompt on the scheduled day of installation and the work was done well within the time estimated beforehand. Installation was neat and the equipment and scope of work was as specified in the quote. One item I must point out is that we were faced with a "No Heat" situation the day before the scheduled installation and Greg came out to address it free of charge. Not only that, but he also corrected an installation fault with our smart thermostat that was not part of the original job, again free of charge.

by one19 in North york on Twintech Heating and Cooling

Greg came by to do a routine furnace checkup. He was very knowledgeable and professional, letting me know what's being checked/adjusted and giving me tips to ensure everything runs smooth. Very honest and upfront about what's working fine vs. what may need to be fixed/replaced. He didn't attempt to up sell anything that wasn't necessary. I'm glad to have finally found someone I can trust and rely on for all my HVAC needs - furnace, A/C, and hot water tank.

by Paul M. from Toronto on Twintech Heating and Cooling

I'm very happy with the work that was done. Everyone from salesperson to the installers were friendly and professional. They were on time and cleaned up the job site after it was installed. They also answered all my follow up questions promptly. I wouldn't hesitate to work with them or recommend them again.

by Kathy D.in Ajax on Twintech Heating and Cooling

Thanks to the team at Twin Tech for a great job installing my new heat pump/ac unit. The guys were very polite and professional. When they left you would never have known they had been there except for the new Mitsubishi unit on the wall!! would highly recommend the Twin Tech team.

by varga p. in Pickering on Twintech Heating and Cooling

Installed professionally, no delays, no rework needed. Very reliable contractor and sales person. Also installed BBQ gas line and some duct work.

by Private User on Twintech Heating and Cooling

Greg and Grant are friendly, reliable, and knowledgeable HVAC professionals. The twins, Dave and the entire team provided efficient top quality service. Our family plns to use Twintech for all of our future HVAC needs.

by peter in Whitby on Twintech Heating and Cooling

Very impressed with this company. They show up on time , kept my place clean and after they left it looks like they were never there. Very professional team. Those people know what they doing . Their installation was on the highest standard. They are very knowledgeable especially they're worker Peter. I strongly recommend this company to everybody. After the installation I receive the call making sure I'm satisfied with their products and their job. Bravo!!!

by James in Bowmanville on Twintech Heating and Cooling

Greg and his brother were referred to us by a friend. They arrived when they said they would, did an exceptional job and left the place as tidy or tidier then they found it. Their professionalism is only surpassed by their kind and friendly demeanor. Even after several calls to help me with my high tech thermostat I feel that I could always call with any concern (No one responds to my texts as quickly as Greg) and have a friendly helpful response. I found out their grandfather started the company and now as a 3rd generation company, they are doing their grandfather proud. I would highly recommend Twintech over any other hvac company out there.

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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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