Furnace Troubleshooting Tips for the Savvy Homeowner

Your furnace is a vital component of your home’s comfort and well-being, especially during the cold winter months. It’s responsible for keeping you and your loved ones warm and cozy. However, like any mechanical system, furnaces can encounter issues from time to time.

Knowing what to do, when dealing with a faulty furnace can save you time and money. In this blog post, we will explore:

  • What a furnace does
  • Common furnace problems
  • Furnace troubleshooting tips
  • When to call a professional
  • The average cost of repairs

Armed with this knowledge, you can better understand and maintain your furnace, ensuring it performs efficiently and reliably.

What Does a Furnace Do?

Before we delve into furnace troubleshooting, let’s start with a basic understanding of what a furnace does. A furnace is a central heating system that works by heating air and distributing it throughout your home via a network of ducts and vents. Here’s a simplified overview of the furnace’s operation:

  • Heat Generation: Most residential furnaces use either natural gas or electricity to generate heat. In gas furnaces, a burner ignites the gas to produce heat, while electric furnaces use heating elements to generate warmth.
  • Air Circulation: Once heat is generated, a blower fan circulates air over the heating source. This air becomes warm and is then distributed throughout your home.
  • Distribution: The heated air is pushed through ductwork to various rooms in your house via vents. This process maintains a comfortable indoor temperature.
  • Thermostat Control: A thermostat, typically located on a wall in your home, monitors the temperature and signals the furnace to turn on or off to maintain the desired temperature setting.

Now that we have a basic understanding of how a furnace works, let’s explore some common furnace problems you might encounter.

Common Furnace Problems

Furnaces can experience a range of issues over time. Here are some of the most common problems you might encounter:

  • No Heat or Insufficient Heat: If your furnace isn’t producing enough heat or none at all, it could be due to a faulty thermostat, a malfunctioning pilot light or ignition system, a clogged air filter, or a malfunctioning blower motor.
  • Strange Noises: Unusual noises like banging, screeching, or rattling coming from your furnace could indicate issues with the blower motor, fan, or other internal components. Ignoring these sounds can lead to more significant problems down the line.
  • Frequent Cycling: If your furnace turns on and off frequently without adequately heating your home, it might be due to a clogged air filter, a malfunctioning thermostat, or improper sizing.
  • High Energy Bills: A sudden increase in your heating bills might be a sign of an inefficient furnace. This could be caused by a dirty or clogged filter, ductwork issues, or a malfunctioning component.
  • Pilot Light or Ignition Problems: Gas furnaces rely on a pilot light or electronic ignition to ignite the gas. If you have a gas furnace and the pilot light keeps going out or the electronic ignition system fails, it can result in a lack of heat.
  • Airflow Issues: Restricted airflow can cause uneven heating in your home. It may be caused by blocked vents, dirty air filters, or issues with the blower motor.
  • Carbon Monoxide Leaks: A malfunctioning furnace can potentially leak carbon monoxide, a colorless and odorless gas that can be deadly if not detected. Symptoms of carbon monoxide exposure include headaches, dizziness, nausea, and confusion. If you suspect a carbon monoxide leak, evacuate your home immediately and call a professional.

8 Troubleshooting Tips

While some furnace problems may require professional assistance, there are several troubleshooting steps you can take before making that call. Here are some tips to help you diagnose and address common furnace issues:

1) Check the Thermostat:

Make sure your thermostat is set to the desired temperature and is functioning correctly. Replace the thermostat batteries if necessary.

2) Inspect the Air Filter:

A dirty or clogged air filter can restrict airflow and reduce furnace efficiency. Check and replace the filter regularly, typically every 1-3 months.

3) Verify the Pilot Light or Ignition:

If you have a gas furnace, ensure the pilot light is lit. If it’s not, follow your furnace’s instructions for relighting it. For electronic ignition systems, check for error codes and reset the system if needed.

4) Clear Obstructions:

Ensure that all vents and registers in your home are open and unblocked by furniture or debris. Proper airflow is essential for efficient heating.

5) Check the Circuit Breaker:

Make sure the circuit breaker for your furnace is in the “on” position. If it has tripped, reset it and see if that resolves the issue.

6) Listen for Unusual Noises:

Pay attention to any unusual sounds coming from your furnace. Try to pinpoint the source of the noise and consult your furnace’s manual for troubleshooting guidance.

7) Inspect the Pilot Tube and Flame Sensor:

For gas furnaces, a dirty pilot tube or flame sensor can cause ignition problems. Clean these components carefully if they appear dirty or corroded.

8) Examine the Blower Motor:

Listen for the sound of the blower motor running. If it’s not operating, it may need to be repaired or replaced.

When to Call a Professional

While DIY troubleshooting can resolve many furnace issues, there are situations where it’s best to call a professional HVAC technician:

  • Gas Leaks: If you smell gas around your furnace, do not attempt to diagnose or repair the issue yourself. Evacuate your home immediately and call your gas company and a professional technician.
  • Carbon Monoxide Concerns: If you suspect a carbon monoxide leak or experience symptoms like headaches and nausea, evacuate your home immediately and call a professional. Carbon monoxide is a deadly gas that requires immediate attention.
  • Electrical Problems: If you’re not comfortable working with electrical components, such as circuit boards or wiring, it’s safer to leave these repairs to a qualified technician.
  • Complex Repairs: Some furnace issues, like a malfunctioning blower motor or a cracked heat exchanger, require specialized tools and expertise to diagnose and repair.
  • Frequent Problems: If your furnace experiences frequent breakdowns or issues, it may be a sign of a more significant underlying problem. A professional can conduct a thorough inspection to identify and address the root cause.

Average Cost of Repairs

The cost of furnace repairs can vary widely depending on the nature of the problem and the region in which you live. Here are some approximate cost ranges for common furnace repairs:

  • Thermostat Replacement: $80 – $250
  • Air Filter Replacement: $10 – $30
  • Ignition System Repair: $100 – $350
  • Blower Motor Replacement: $300 – $600
  • Pilot Light Repair: $150 – $250
  • Ductwork Repair: $200 – $1,000 (depending on the extent of the damage)
  • Heat Exchanger Replacement: $500 – $1,500
  • Gas Valve Replacement: $150 – $350

It’s important to note that these are rough estimates, and actual costs may vary. Additionally, some repairs may require additional fees for emergency or after-hours service.

Get Help With Your Furnace Problem

When in doubt or when dealing with complex problems, it’s always best to call your local HVAC technician. Regular maintenance and prompt repairs will help ensure your furnace operates efficiently and keeps your home warm and cozy for years to come. Not sure where to start?

Aquarius Home Services is the area’s leading HVAC system expert. From furnace repair to furnace replacement, we can help you find solutions that fit your budget and lifestyle. Contact us today to book your appointment! 

Nicholas Kintigh
Nicholas Kintigh
1739846058
Wyatt was very knowledgeable and friendly. He seemed to know what needed to be done and explained everything.
Jodi Powell
Jodi Powell
1739844907
Great customer service!!!! I would highly recommend!!!!
Charlie Cremers
Charlie Cremers
1739835727
Justin from Aquarius Kincetico was great. He was very knowledgeable about our drinking water system, and our water softener system. He walked through everything with me. Thank you again for all your services
Diane Chaussee
Diane Chaussee
1739834775
Derk was so informative and always asked if we had any questions. He answered every question that we asked him. He was pleasant, knowledgeable, and very nice. It was a wonderful experience and we are so happy we have this system now to drink good water! Thank you!!!
Rod S
Rod S
1739831646
Very friendly and knowledgeable. Nick is a great representative of your company.
Jim Molitor
Jim Molitor
1739831493
Very knowledgeable and helpful
J Carroll
J Carroll
1739828599
On time, professional, and efficient. Ryan / Aquarius knows what he is doing!
kurt nyberg
kurt nyberg
1739827475
The people there are supper great and did a great job explaining what we needed to know about it and installing in the time he said
Greg Wax
Greg Wax
1739827456
Rena Shepard
Rena Shepard
1739827174
Anthony was very nice and patient with all. Did a great job and explained everything to me. Thank you
Robert Boyle
Robert Boyle
1739825454
Great and professional installation.
jane larson
jane larson
1739823632
Mike was very thorough and explained everything he was doing. He was a great representative of Aquarius Home Services.
Erik Johnson
Erik Johnson
1739818756
Great service
Maria Fernandes
Maria Fernandes
1739818541
Technician was awesome and did a great thorough job with routine maintenance and system inspection, including taking sensor measurement data at a ceiling vent. World-Class professional knowledge, talent, and technical skill. Thank you, Alec! We look forward to AC inspection in the approaching season, as well...
Gail Brandt
Gail Brandt
1739817675
Gordy provided great service.
Donna Kodet
Donna Kodet
1739810757
Great experience with work done today.Excellent explanations on systemThey were happy to make adjustments as requested. Highly recommend them
Andrew Blattner
Andrew Blattner
1739747698
Great service and experience! Andrew was awesome!
DAN KOLAND
DAN KOLAND
1739683557
Nick repaired our furnace on a Saturday night. He walked me through what was was wrong and had it working after a short period of time. Nick and Aquarius are the best! It would have been a cold night without them.
Christopher Sobraske
Christopher Sobraske
1739658824
Ryan Kahl did a phenomenal job! Extremely knowledgeable about our system and was able to answer all my questions. He was very professional and helpful especially with taking the time to make sure I was 100% confident in our system along with giving me helpful tips above and beyond our system. He really exceeded the value we expected from our service plan.
Corinne Klitzke
Corinne Klitzke
1739645858
Heather Reynolds
Heather Reynolds
1739644317
Max was very helpful!
Bill Enloe
Bill Enloe
1739570182
Pete Hayes
Pete Hayes
1739565324
Was a bit hesitant on keeping up with Kinetico!! But your two service techs ( Justin and Hannah)went above and beyond what I was expecting!! They spent so much energy and information related to my issues , making it a pleasant experience. Like I gained two new friends. Plus explained how a different service should take care further issues. Definitely would like to see them for my next service!!! Even got my wife back on board. Thanks again. Pete Hayes
Debbie Doyle
Debbie Doyle
1739561479
Aquarius came out this morning and replaced two toilets and did some plumbing work downstairs all in one morning. The plumber, Joe, was efficient, answers questions, provided helpful information, and was very friendly and personable. I will DEFINITELY use Aquarius again.
Matt Van Beusekom
Matt Van Beusekom
1739558449
Excellent and efficient work. Would definitely recommend!
Josey Dooley
Josey Dooley
1739557030
Amazing service!
Jessica Tracy
Jessica Tracy
1739556713
Gordon was very friendly and knowledgeable - makes the visit/process so much easier.
James M
James M
1739555300
After months of high water bills and feeling itchy, the Aquarius team came to the rescue. My 25 year old kinetico softener finally gave up and was constantly cycling. At the end of the service call we realized the old unit wasn't worth repairing. They sent out a salesperson the same day, providing a great range of options to fit my price point. My new softener arrived early so we were able to move up the install date. Install was flawless and we're back to having the softest water ever. I'm super happy with every interaction I've had with the Aquarius team. They are all super friendly, knowledgeable, and professional. I rarely leave reviews and only leave them when I'm really impressed. That's definitely the case with this company.
Brian Hagen
Brian Hagen
1739551834
Steve Sherwood
Steve Sherwood
1739551765
Great service. Prompt and knowledgeable
Peter T
Peter T
1739551605
Dirk did a good job communicating and installing the system. Recommend.
Nancy Lahmann
Nancy Lahmann
1739551066
Dylan checked boiler and did a thorough inspection. Very polite. He also knocked off a big ice chunk outside …extra service and much appreciated.
Ann Marie Haerter
Ann Marie Haerter
1739550777
Friendly, efficient, knowledgeable
Kenneth Schwebach
Kenneth Schwebach
1739498359
Great service tec! She was very knowledgeable and helpful.
Neal Kempel
Neal Kempel
1739497034
First, Aquarius responded to my interest in an RO system promptly. After deciding to commit to their solution, the installation, Including a water softner solution, it was scheduled the same week. Michael was the installer and he called when in transit and arrived right on schedule. We went over the work to be done and the placement of the equipment with only one issue that arose. The RO and water softener installation would not be a problem, but plumbing for the outdoor outlets would require additional material and labor, not included in the quote. I was looking forward to using the outdoor faucets without switching the system over. We elected to continue with the installation and Michael kept us informed throughout the day of his progress and completion time. He had everything cleaned up and provided us with a review of the system. To date, we are very pleased with the system and want to thank Michael for a great install. My only recommendation to Aquarius would be to take an additional step, during the initial meeting possibly, and physically look at the plumbing to ensure the quote covers all the materials to meet the customer request.
Jacqueline Garberg
Jacqueline Garberg
1739496644
Wyatt was thorough, considerate, a trusted service professional! Thank you!
Deb N
Deb N
1739489085
Tyler from Aquarius Home Services did a great job! He was extremely knowledgeable and helpful.
Jeffrey Ek
Jeffrey Ek
1739486327
The techs are always very cordial, explain what they are doing, and in and out as quickly as makes sense. Having said that, I’ve never felt that they rushed through their work.
Keith Wolff
Keith Wolff
1739485872
Everything was checked out and explained the tech was very informative would recommend them. Thank you!
Jessica Fisher
Jessica Fisher
1739484813
We have had our Aquarius services longer than a decade. During this time, the equipment has never failed us, but more importantly we have received absolutely outstanding customer service anytime we have needed anything. Today was no different, Wyatt came to our house to do our periodic inspection and was able to help troubleshoot a problem and find a solution the very same day. The entire time he was here, he kept his workspace, clean and orderly, and he was very polite and respectful of our home. The shocker came when he was about to leave and told me this was his fifth day On his own! Very impressed, not only with him as a person, but the quality of employees that come out out of Aquarius. Highly recommend this company.
Jane Ogren
Jane Ogren
1739484717
Friendly and knowledgeable
Mike Gunderson
Mike Gunderson
1739483907
I had an old furnace that was on its last legs and needed to be replaced ASAP.Day one: Service Tech arrived 2 hours after initial contact with Aquarius. Sales Rep arrived within an hour of the request. Deal was made and installation appointment scheduled for the NEXT DAY!Day two: Contacted by the installation team at 7:00 am. Arrived at 7:30. Finished up by 2:30.All of the staff that I dealt with were friendly, professional and great to work with. They explained everything very well. I was expecting to wait 2-3 weeks for a new furnace and A/C. This was all done inside of two days. I would 100% recommend Aquarius to anyone needing any type of home service.Tall Mike, Mike Sippel, Chris Oigard, Dave and Luke it was great to work with you. Thanks for everything!Oh, they like dogs too.
Katie Raymond
Katie Raymond
1739481339
Sue Ufheil
Sue Ufheil
1739471348
Colton was very professional and explained everything he was doing. Very happy with service today.
Jarrod Wieland
Jarrod Wieland
1739470866
James Grant
James Grant
1739469886
Wonderful experience with Andrew & Joey , installed new efficient electric water heater . Courteous , clean , efficient, highly recommended
Jeremy Ruth
Jeremy Ruth
1739468208
Justin and Hana were super friendly and they helped figure out an issue with our RO system. Great appt
James Dixon
James Dixon
1739466779
Creative problem solver, pleasant personality, efficient and cleaned up well.
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