Tips & advice

Furnace Trouble? 6 Signs It’s Time for a New System and How to Choose Wisely

February 14, 2025

A technician in a red Coleman bucket hat and blue Complete Home Comfort shirt repairing the burner compartment inside an open furnace cabinet.

A functioning furnace is essential in colder climates to ensure comfort and safety during harsh winters. An old furnace can lead to rising repair costs and decreased energy efficiency, resulting in higher utility bills. Investing in a new, modern furnace typically provides better energy efficiency, lower monthly costs, and reduced maintenance. Although the initial investment may be significant, the long-term savings and improved comfort make it a smart financial decision.

Sign #1: Age of the Furnace

The age of your furnace is a critical indicator of its health, with an average lifespan of 15 to 20 years. As furnaces age, their efficiency and reliability decline. Older units typically require more energy to produce the same heat, leading to higher energy bills. Additionally, they are prone to more frequent breakdowns, making them less reliable during peak cold periods. Investing in a new furnace can significantly improve efficiency and reliability, ensuring your home stays warm and comfortable.

Sign #2: Increased Energy Bills

Rising energy bills can be a clear sign that your furnace is becoming inefficient. As furnaces age or malfunction, they often require more energy to maintain the same level of heating, resulting in noticeable increases in your utility costs.

To monitor for unusual spikes in your energy bills, consider the following tips:

  1. Track Monthly Usage : Keep a record of your monthly energy consumption over time to spot trends. Compare your current usage to the same months in previous years to identify any significant increases.
  2. Review Bill Details : Check the breakdown of your energy bill to understand how much energy is being used for heating. Look for any sudden jumps in kilowatt-hours or therms consumed.
  3. Consider External Factors : Take into account any changes in your home, such as adding new appliances or changes in insulation, that could affect energy consumption.
  4. Set Budget Alerts : Many utility companies offer online services that allow you to set budget alerts for when your usage exceeds a certain threshold.

By staying vigilant about your energy bills, you can identify inefficiencies in your furnace early on and take action before costs escalate further.

Sign #3: Frequent Repairs

Frequent furnace repairs can signal that your unit is nearing the end of its lifespan and struggling to operate efficiently. Each repair adds up in costs and can lead to unexpected breakdowns, leaving you without heat when you need it most.

If your annual repair costs are approaching half the price of a new furnace, it’s often more economical to invest in a replacement. Weighing ongoing repair costs against a new furnace investment can lead to a smarter decision for your home heating needs.

Sign #4: Uneven Heating

Uneven heating in different rooms often indicates issues with your furnace. If some areas are too hot while others are cold, it may signal problems with the heating system, ductwork, or insulation.

Before considering a replacement, troubleshoot by checking for blocked vents, ensuring your thermostat is functioning properly, and inspecting ductwork for leaks. If these steps don’t help, consult a professional HVAC technician to assess your furnace. Addressing uneven heating quickly can enhance your home’s comfort and energy efficiency.

Sign #5: Unusual Noises

If you hear strange sounds coming from your furnace, it could indicate underlying issues. Common noises include:

  • Clanking : This may suggest loose or broken parts within the furnace.
  • Buzzing : Often indicates electrical issues or a malfunctioning transformer.
  • Rumbling or banging : This can be a sign of delayed ignition or a buildup of gas.
  • Hissing : This might indicate a gas leak or an issue with the pressure.

If these noises persist, it’s essential to consult a professional HVAC technician. Ignoring unusual sounds can lead to more significant problems and safety risks, so addressing them promptly is crucial for your furnace's health.

Sign #6: Yellow Burner Flame

The color of your furnace's burner flame is important for safety. A blue flame indicates proper combustion, while a yellow flame suggests incomplete combustion, which can lead to carbon monoxide buildup.

If you notice a yellow flame, it's vital to address the issue immediately, as it may indicate a malfunctioning furnace or blocked vents. Consult a professional HVAC technician to ensure your home remains safe and comfortable. Regular maintenance can help prevent these issues.

How to Choose the Right Replacement Furnace

  1. Efficiency Ratings : When selecting a replacement furnace, look for ENERGY STAR® ratings and Annual Fuel Utilization Efficiency (AFUE) percentages. ENERGY STAR® certified furnaces are more energy-efficient, helping to lower utility bills and reduce environmental impact. A higher AFUE percentage indicates better efficiency, meaning more heat is produced from the same amount of fuel.
  2. Size Matters : Choosing the right size furnace for your home is crucial for optimal performance. An undersized furnace will struggle to heat your space, while an oversized unit can lead to energy waste and inconsistent temperatures. A proper assessment will help determine the appropriate size based on your home’s square footage and insulation.
  3. Fuel Type : Consider the different fuel types available—gas, electric, and oil. Gas furnaces are generally more efficient and cost-effective, while electric models can be easier to install and maintain. Oil furnaces may offer high heat output but often come with higher fuel costs and maintenance needs. Each option has its pros and cons, so evaluate what best fits your needs and budget.
  4. Professional Advice : Consulting with HVAC professionals is highly recommended. They can assess your home’s heating requirements, recommend suitable furnace models, and ensure proper installation. Professional guidance can help you make an informed decision, ensuring comfort and efficiency in your home.

In conclusion, several key signs indicate it might be time for a new furnace. These include the age of your unit, increased energy bills, frequent repairs, uneven heating, unusual noises, and a yellow burner flame. Recognizing these warning signs can help you avoid costly breakdowns and ensure your home remains warm and comfortable.

Making an informed decision about replacing your furnace is crucial for both your comfort and safety. A new, efficient furnace not only enhances your home’s heating but also reduces energy costs and minimizes maintenance issues. Taking the time to assess your current system and explore replacement options can lead to a more reliable and efficient heating solution for years to come.

If you see signs your furnace needs attention, act now. Contact Complete Home Comfort for an inspection or to discuss replacement options. Ensure your home stays warm and comfortable—reach out today!

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Technician was prompt, professional, and courteous, and prices were reasonable. Would definitely hire again!

Rated 5 out of 5. Kathleen

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4.9 out of 5 based on 1,841 reviews

Parker A.

Rated 5 out of 5.19 days ago on Google

We had Micheal come out and look at our furnace and were impressed! We recently had a new furnace put in by a different company and did not have a good experience… The other company basically left us dead in the water with a bill and a furnace that was over heating! Within minutes Michael had it diagnosed and fixed! Don’t go anywhere us trust me!

Vickie

Rated 5 out of 5.19 days ago on Google

Jeremy did an outstanding job!!! He also gave me additional information about my installation from the company that installed my boiler. It has been leaking since they put it in, 3 years. They have been out several times without fixing the problem. Jeremy told me what they need to do to make it stop leaking!!!! I'm never calling anyone else for boiler maintenance and repair again.

Liz M.

Rated 5 out of 5.19 days ago on Google

Very polite and knowledgeable

Jon M.

Rated 5 out of 5.19 days ago on Google

System failed because of a power outage. Jeremy knew exactly what was wrong. He couldn't have been nicer, or more helpful. Great experience.

Dale D.

Rated 5 out of 5.19 days ago on Google

James made my Home warm again !!! Thank you !! Complete Home comfort was excellent in getting my job done.

Leilani

Rated 5 out of 5.19 days ago on Google

Outstanding job

Korrin E.

Rated 5 out of 5.20 days ago on Google

Michael solved our issue quickly and efficiently and was super friendly. Another great experience with Complete Home Comfort.

Sherri W.

Rated 5 out of 5.22 days ago on Google

I called about furnace not working and received service the same day. It was a thermostat issue and Chris was able to install a new one for us, and got it running. He was very polite and friendly. I highly recommend this company!

alan f.

Rated 5 out of 5.22 days ago on Google

There was no heat in the house!! Technician showed up on same day as I called!! Got the furnace working but do need a new one which I ordered. Technicians name was James. Highly highly recommend him as great customer service resolved my problem and honest. I would and am using Comfort again. Also got a service contract, I was so impressed. I live in Erie.

Michigan B.

Rated 5 out of 5.22 days ago on Google

I want to give a shout out to Complete Home Comfort. This company has gone above and beyond in servicing our heat and AC needs for many years. We just had our fall furnace service check and again, they did not disappoint. Bonus if you or spouse is a veteran. The annual service calls might as well be free. They are veteran owned. No price gouging or pressure sales of any kind. They are always very respectful of our home while working. Excellent service by people who are great at what they do and polite while they are doing it. A+ Rob and Shannon Bruley

Rich S.

Rated 5 out of 5.23 days ago on Google

Excellent customer service. Called them at 4 pm on a Friday. They said they could have a service tech out that night or first thing in the morning. Then I got a call about 10 mins later from the tech, saying they would be out in about 20 mins. Michael was informative and quick. Found the issue and fixed it in no time. Just great service all around!!

J. P.

Rated 5 out of 5.23 days ago on Google

I had a great experience having this company out for the first time. We have lived in our house around Monroe for 4 years after we had it built and have yet to have the furnace looked at until now. Michael was very pleasant to talk to and he brought up a safety issue to me and then quickly corrected it at no cost. Even though it took him 30 seconds to fix it, he showed me what it was and just took care of it. He was very informative and because my wife is a veteran he explained to me their program for veterans and first responders. It is a wonderful program for these folks and he also told me to thank my wife for her service. Their furnace tune up special had ended but they did give me that price and that is much appreciated. I will definitely continue using this company and they are Veteran owned. If you are a veteran or first responder, I would definitely call and inquire about their maintenance program for veterans. I would like to say thank you for your service to their owner as well and to all U.S. veterans.

Debbie W.

Rated 5 out of 5.26 days ago on Google

James from Complete Home Comfort was sent to my home in Newport, MI for a "Second Opinion," on a furnace repair. A week ago I contacted a local Monroe MI HVAC business who installed my brand new furnace in the latter part of October 2023. I was told by the technician doing the estimate repair order who is employed with the original installing company of my furnace that my furnace was no longer under warranty, that my warranty expired last year! The 2 parts were going to cost me with over $2200.00!! My original "Brand New" furnace with installation cost around $5,000.00. I was very concerned about the price and that a brand new furnace would need that costly of a repair and only 3 years old. I had done the biannual maintenance recommended with no noted issues so my gut told me call another local business for a second opinion. I am so glad I followed my gut because Complete Home Comfort had a technician at my Newport, MI within a couple of hours. James called on his way to my home, introduced himself when he came to the door. After my explanation of what my furnace was doing he got into looking at the problem. He found the other companies quoted estimate was misdiagnosed and the repair was way less. Extremely less! James also took the time to call the manufacturer of my furnace and it was never registered by the installing company which would have been a covered part if it had been registered. James was awesome, he had the replacement part on his truck and was able to have it replaced and running within minutes. I am so very happy with Comfort Home Care from my initial call earlier this morning to the repair today! I will highly recommend this business to family and friends. Hopefully I won't need it but if in the future I have problems with my furnace or central air unit, "Complete Home Care," will be the business I call . Thank you Complete Home Comfort for a job well done!

Mary S.

Rated 5 out of 5.27 days ago on Google

Kalim was early for appointment time- that was great- he was very professional, explained the problem, reviewed cost choices and set follow up to complete repairs after parts were ordered.

Rachel W.

Rated 5 out of 5.30 days ago on Google

The complete home comfort team always provides excellent quality work. Scheduling is easy and they are always very straight shooting on issues with HVAC and furnace maintenance and repairs. Knowledgeable and friendly service everytime is a plus.

Candi D.

Rated 5 out of 5.30 days ago on Google

The service man was great. Very nice and very complete. He showed me how to put in filter. Told me no problems with furnace. I give service man a A++A+A+A+A+AA+A+

Nicx777

Rated 5 out of 5.4 weeks ago on Google

Kalim came out and was polite and helpful. He made sure he understood the concern and fixed the issue and was quick. He also out on booties without being asked which is always a plus. I had a simple drier vent issue and he was able to fix it quickly and easily.

Brittany B.

Rated 5 out of 5.4 weeks ago on Google

Very affordable and quick reliable service! Caller yesterday for a tune up for our boiler system and they came out the next day did a great job

Flying C.

Rated 5 out of 5.4 weeks ago on Google

Dude showed up early, serviced my appliances, gave me some advice on how to prevent issues with my furnace and what to look for, he was friendly and professional and they sent the same guy who had been there a year ago, I like that. I only had to take an hr off of work and honestly, if I would have left as soon as he was done I would've been 15 mins behind, thats how straight to business he was about it. For service calls and stuff, being on the ball like that is so appreciated, I've lost full days waiting for cable guys and stuff like that. 10/10 would recommend.

J C.

Rated 5 out of 5.4 weeks ago on Google

They came out and not only replaced our furnace, hot water tank and air conditioner condenser, they replaced all lines, and repaired the unprofessional job from the previous owner. They worked all day and were great at what they do. I will recommend them to anyone.

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