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Posted On: October 9, 2024
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:
Apr 12, 2019
On one of the coldest days of winter, our furnace stopped working. Our regular furnace company came and told us we had a CO2 leak and shut us off. Their quote for a new furnace was way too high and they couldn't even install it on the same day. TwinTech was recommended to us by a friend. We called and spoke to Dave who was very nice and knowledgeable. Grant showed up a short time later and a new furnace was installed the same day with no troubles at all. Best of all, we received a higher-end furnace than what was offered by our previous company and at a cheaper price. I would recommend TwinTech with no hesitation at all.
Apr 11, 2019
I installed a new furnace and Air conditioner with them. The installation is of high quality and according to standards. The guys are professional and reasonably priced.. I highly recommend them.
Apr 10, 2019
Had new furnace installed and ran into some difficulties but the contractor responded in a timely and efficient manner - after further service calls were made, a reasonable resolution was found.
Apr 8, 2019
The work was done quickly efficiently neatly and professionally. Pleased with the service, information, product, and the company.
Apr 1, 2019
Great sales member named Dave came in told us some amazing items and how they would be priced installed an all. We couldnt believe it! The next day the ac was installed, that day one employee named Greg told us that our furnace was working way to hard and was causing us to use way too much gas. So two days later they came in an installed a new furnace!
Apr 1, 2019
Installation was done quickly and professionally. The new furnace is quiet and provides even heat.
Mar 3, 2019
They removed and discarded old furnace. Installed new furnace. Installed air intake pipe, that had never been installed by builder, no charge. Replaced loose hose on floor with hard pipe and rerouted it to drain, no charge. Almost 33% cheaper then quote from Enercare, which was the company we dealt with and had insurance with for 8 years. No yearly fee for cleaning/insurance, saves 300 a year. Courteous, professional, fast, and friendly. My wife and I have been recommending them to everyone we know and meet, and will continue to do so. Thanks for everything, Twintech!!!
Mar 4, 2019
This company was great to deal with. Our furnace went down and they installed a new furnace the next day with a lot of professionalism!
Feb 22, 2019
Finally! An honest company with highly knowledgeable and informative staff. Had a furnace service and found multiply errors in our system from an amateur installer. Very fair price to correct problems and will definitely use again.
Feb 16, 2019
Had to replace the heating & a/c unit in a condo apartment dwelling. this company recommended by the property manager and president of the condo building. found their workmanship and attention to details very good and very thorough. were able to resolve small problems and situations and happy to feel the heat in my unit. it's pricey, but happy was done by a very professional service. thank you.
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