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Serious Furnace Issues Only Professionals Can Solve
Posted On: January 26, 2025
A furnace is essential for keeping your home warm and comfortable, especially during cold months. While regular maintenance can prevent many problems, certain furnace issues are too complex or dangerous for DIY repairs. Here are some serious furnace problems that require the expertise of a professional technician:
1. Furnace Not Producing Heat
If your furnace isn’t producing heat despite being turned on, it could be due to issues such as:
- A failed ignitor or pilot light. Modern furnaces use electronic ignitors or pilot lights to start the heating process. If these components fail, your furnace won’t produce heat.
- Thermostat malfunctions. Incorrect calibration or a faulty thermostat can prevent your furnace from activating properly.
These problems require technical know-how and specialized tools to diagnose and repair.
2. Frequent Cycling (Turning On and Off)
Short cycling can lead to inefficient heating and increased wear on your furnace. Causes may include:
- Clogged air filters. Restricted airflow forces the furnace to overwork, causing frequent shut-offs.
- Improper thermostat placement. A thermostat located near heat sources may cause your furnace to turn off prematurely.
- Overheating. Internal components may overheat due to mechanical failures or blockages.
A professional can identify and fix the root cause to prevent long-term damage.
3. Unusual Noises
Banging, screeching, rattling, or whistling noises are often signs of serious internal issues such as:
- Loose or damaged belts.
- Malfunctioning blower motors.
- Cracked heat exchangers.
Ignoring these sounds can result in costly repairs or even safety risks, such as carbon monoxide leaks.
4. Uneven Heating
If certain rooms in your home are significantly colder or warmer than others, it may indicate:
- Ductwork issues. Leaks, blockages, or poor design in your duct system can reduce airflow.
- Aging or undersized furnaces. Your furnace may not have the capacity to heat your home efficiently.
A technician can assess your heating system and suggest solutions such as zoning systems or upgrades.
5. Gas Leaks or Carbon Monoxide Concerns
A gas leak or carbon monoxide issue is a critical safety hazard. Warning signs include:
- A strong smell of gas.
- Physical symptoms such as nausea, dizziness, or headaches, which could indicate carbon monoxide exposure.
- A yellow or flickering burner flame instead of a steady blue one.
These situations require immediate professional attention to ensure your home and family are safe.
6. Persistent Pilot Light Problems
If your pilot light frequently goes out or burns with an unusual color (like yellow instead of blue), it may point to:
- A dirty or clogged burner. Debris buildup can disrupt gas flow and ignition.
- Thermocouple issues. A faulty thermocouple can prevent the pilot light from staying lit.
These components are delicate and should only be handled by a trained technician.
7. Electrical Problems
Blown fuses, tripped breakers, or problems with the furnace's control board can cause operational failures. These issues are complex and involve working with live electricity, which poses a risk if not handled properly.
Why Professional Repairs Matter
Attempting DIY repairs for serious furnace issues can:
- Void your warranty.
- Lead to incorrect or incomplete fixes.
- Risk your safety due to exposure to gas leaks or electricity.
Certified technicians have the training, tools, and experience to diagnose and repair furnace issues safely and efficiently.
Final Thoughts
When your furnace encounters serious problems, don’t risk your safety or the comfort of your home by trying to fix it yourself. Contact a trusted HVAC professional to ensure your furnace is repaired correctly and operates efficiently for years to come.
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See What Our Customers Are Saying:
Jul 2, 2017
Very impressed they arrive to quote even though I had forgotten to call them back to confirm date & time. They showed the day before installation to deliver the unit. Returned the next day as promised at 9am. Project was completed in a professional manner. They even fixed a few things that they noticed were not installed correctly, or to code by previous heating & air contractors we had at our residence before. Would recommend this company to everyone!
Jun 29, 2017
Greg removed old oil furnace and oil tank from basement relocated new Napoleon propane furnace to allow duct work to be rerouted to a much more suitable location. Moved air conditioner to the new furnace. Dave recommended two available grants to assist with cost. They kept to their original quoted price which was substantially lower than a competitors for the same furnace and work. They completed the work as stated when stated and left the area clean and tidy. We are very pleased with the outcome.
Jun 28, 2017
Twintech installed a Goodman furnace and ac init. Very professional install, both units are working well.
Jun 28, 2017
We had Grant and Greg Dainty quote to replace our 20 yr old furnace. I have known them for years and have had other jobs done by them ( AC and Pool Htr). The price was very reasonable and the job was completed in one day.
Jun 23, 2017
TwinTech was the right choice. Our consultation with Dave set the tone. Professional and knowledgeable, we even received a follow-up call within hours of our install completion, wow! TwinTech arrived as scheduled to install our A/C unit. Within minutes of arrival Greg noted and explained a few out of code faults on our furnace installed by another company, problems fixed, thanks TwinTech. Greg, Grant and "Subaru" Pete were meticulous start to finish. Highly recommended!
Jun 13, 2017
Twintech replaced our aging +20 yrs old Furnace & AC with the variable high efficiency Napoleon Furnace matched with the Goodman AC. Sales guy ,Dave was great, gave a no pressure estimate, explained about the Government Rebate program which they took care of completely including arranging the home energy audit. On the scheduled day Greg and his team arrived on time, did a great job and completed the same day , extremely professional and courteous, cleaned up everything , tested the system, Greg took his time to explain the setup. Very impressed with the Napoleon Furnace 9600 which did a great job in maintaining a comfortable temperature last winter and now with the hot weather the Goodman AC cooled the house in much less time than the old AC unit could ever. From start to finish Twintech were great and have no hesitation in recommending them 100%.
Jun 13, 2017
The Twintech team did an excellent job installing our new Goodman air conditioner. They were polite and professional. Greg was knowledgeable and clearly experienced. Thank you Twintech for bringing our cooling system up to current regulations. Job well done!
Jun 11, 2017
Dave from TwinTech was very knowledgeable, professional and thorough in the buying process. He helped us to identify the best furnace for our home and our budget. When we needed a new filter a year later and seemed to have a problem finding the right one, I called Dave up and he delivered a filter to me the next day! The cost was on par with other retailers, but it was this unexpected personal service that really was impressive. The furnace? Works like a charm.
May 27, 2017
Imagine, it's 5 minutes after the midnight countdown New Year's eve and the furnace quits. We called TwinTech fully expecting to leave a message and actually spoke with Greg, one of the owners! We had an immediate repair early the next morning & a new furnace within the week. We have entrusted TwinTech with all our home HVAC service needs for over 6 years. That's why this week with an opportunity to purchase a new BBQ, we called them 1st to see about a gas line install. It's chicken on the grill tonight! They are efficient, reliable, honest, hard working, and -- attentive is an understatement.
Jan 19, 2016
Wonderful customer service, starting from the job quote (Dave), to the clean install, to the follow-up. Twintech is a small company which installed my Napoleon furnace, A/C, John Wood tank, and ran the line for my gas dryer. The installation was completed as promised in one day. The work area was kept very clean, and they even took care of my old rental tank. The professionalism and wonderful customer service is second to none. They completed all of my rebate paperwork, and now I'm getting $2000 back! You will not be disappointed if you hire this company for your project.
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