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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:
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.
Jan 9, 2016
I was referred to Twintech by a neighbour and was not disappointed. Not only was the customer service excellent their workmanship was second to none. Greg and Grant work extremely clean covering the pathway to the furnace room, labeling the essential parts, left the area spotless and were efficient. They cleaned up the mess left by the previous installers (wiring, improperly installed AC coil, and gaps in venting etc). They also ran through the operation of the new furnace and gave me some maintenance tips. Greg and Grant are professional and all around good guys. I will definitely recommend their service to anyone without hesitation.
Dec 18, 2015
Very satisfied with service from Twintech , beginning with all the information provided by Dave , which helped make the decision much easier . Installation was very smooth & done on time as promised & cleanup was well done . Would definitely recommend this company & use them again for any future needs . Well done.
Sep 18, 2015
Twintech Heating & Cooling Inc. came in and replaced my 39 year old furnace with a beautiful Napoleon variable high efficiency furnace! Their work was efficient and professional and they were a pleasure to deal with, from sales to installation! I would highly recommend them.
May 6, 2015
After receiving numerous quotes to replace my old furnace and AC unit (which was 20 years old) I went with Twintech. Dave, in sales, answered questions professionally and promptly and worked diligently in order to secure my business. Installation was scheduled the week after and Greg and Peter showed up, as scheduled, and did a fine job installing both units. The site was left tidy and neat. I would highly recommend Twintech for your furnace and AC work.
Dec 17, 2014
I chose TwinTech because they installed my new furnace a few years ago and did a great job. When they installed my new A/C, they replaced all parts -- the copper pipes, the housing on top of the furnace and the wiring. (Apparently, the wiring for my old A/C was insufficient.) Their pricing was competitive. The sales representative came to see me within a few hours of my call. My new A/C was installed a few days later and I couldn't be happier with Twintech's professionalism and work. I would recommend TwinTech to any homeowner.
Feb 3, 2014
Had a great experience with this company. Great price and great customer service. You wont be disappointed with twintech. Discussed the job with Greg while he was installing who was extremely informative and obviously enjoys the work he does.
Mar 31, 2014
I needed my AC unit relocated due to upcoming landscape work. I reached out to the Twintech team through Homestars. Dave connected with me immediately to discuss the project and various options. We decided the best option was to mount the unit on the wall. Greg was in touch with me the same day as well and we scheduled the work for later that same week. This was a small job so I did not think I would get immediate attention. The Twintech team exceeded my expectations in every respect. They were very knowledgeable and friendly. The team arrived exactly on time on the scheduled day and worked efficiently to get the job done quickly. I would definitely use Twintech again for any Heating and AC projects.
Jan 1, 2015
I have used Greg Dainty for over 15 years in 3 different homes, for heating, cooling, pool heaters, appliances and bbq lines. Greg has always been so professional, friendly and the workmanship nothing short of fantastic. Greg has always discussed my options and fixing versus replacing, giving his honest opinion and what works best for me cost effective wise and long term. I have valued his opinion so much and have not trusted my gas needs with anyone since using him. I have also referred him to many of my friends and family and have always been so thankful with how well and quickly he looks after us all. I hold Greg in the highest regard and would recommend him to anyone with complete confidence!
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