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10 Signs That Your Gas Furnace Needs Repairs

By Aztil –

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As we enter the holiday season, it’s time to fire up the heater and stay cozy on those cool winter nights. Even Florida has a winter, though we may prefer to crank up the heat until shorts are still comfy indoors. To do that, your gas furnace becomes the most important appliance in the house. After that initial smell of burning dust, your furnace should hum along all winter. But what if it doesn’t? We don’t use our heaters for much of the year, but reliable heating in the winter is vitally important. Knowing when to call for furnace repairs can keep you cozy all season and provide peace of mind for next winter. Aztil Air is here to help. Let’s look at the ten signs that your gas furnace needs repairs.

1. Strange Noises

Furnaces rarely make noise. You may hear some creaking right at first, but any serious noises are a bad sign.

  • Baning
  • Clanging
  • Squealing
  • Scraping

These sounds mean there is something wrong inside your gas furnace. These sounds can indicate loose or faulty components. Calling for repairs ASAP is the best way to stay safe and warm.

2. Inconsistent or Insufficient Heat

Your gas furnace should provide a steady flow of heat throughout the house. If you’re not getting enough heat, if the heat comes and goes, or if certain parts of your house have cold spots, there’s a problem. It could be an uncalibrated thermostat, clogged filters, problems with the blower fan, or a problem with the core heating system.

3. Short Cycling

A short cycle is when your furnace turns on and off repeatedly. This means it is not completing a full heating cycle and is likely taking damage and wasting energy with a very short cycle. Short cycles can be caused by a clogged air filter or signal problems from the thermostat. It can also happen if the furnace is overheating for some reason.

Quickly call Aztil Air for repairs if a gas furnace short cycles, as it could be dangerous and inefficient.

4. Rising Energy Bills

Did your energy bills suddenly spike when you turned on the heater? Does it cost way more to heat your home this winter than last winter, even in Florida’s mild cold season? If so, then you may have a furnace problem. Your furnace is working harder than it should. It could be an issue with your filter, ducts, or worn-out components that must be replaced.

Get your furnace inspected and tuned up before it costs a fortune in electricity or gas.

5. Yellow or Flickering Pilot Light

A pilot light provides a gas furnace with an essential function: lighting the gas used for heating. A healthy furnace should have a steady blue flame in the pilot light. If the flame goes yellow (a cooler flame) or flickers, it could indicate a problem with the furnace’s ventilation or gas supply. It could even be a sign of carbon monoxide leaking.

Immediately turn off your furnace and call Aztil Air for emergency repairs.

6. Unpleasant Smells

The burning dust smell when you first turn on your heater for the season is normal. But unusual smells after that should be a red flag.

  • A rotten egg smell can indicate a gas leak. Immediately shut off your furnace and its gas line, then open the windows before calling for emergency repairs.
  • A burning smell can indicate your furnace is overheating or there is a faulty component or exposed wiring that is scorching inside. Again, immediately shut it off and call for repairs.

Aztil Air can help you stay safe with emergency furnace repair services.

7. Difficulty Starting Your Furnace

Have trouble getting your furnace to start or keep running? This could be an issue with your gas furnace ignition system. It could also be a wiring flaw or a thermostat malfunction. A pro can help you diagnose and fix the problem so your furnace provides reliable heating again.

8. Frequent On/Off Cycling

If your furnace cycles on and off often, but not quite short cycling, it could still be a problem. This could indicate an issue with airflow or the thermostat. An inspection can discover why your furnace won’t keep running steadily.

9. Excess Dust or Poor Air Quality

A little dust when you first start your furnace is normal. But if the dust keeps increasing and your home’s indoor air quality drops, this could mean your furnace is not circulating air correctly or cleanly. Florida’s humidity can also cause dust to build up in your ducts and release when the blower runs. Duct cleaning and a furnace inspection can get to the root of the problem and help clear the air inside your home.

10. Carbon Monoxide Detector Alerts

Any home with a gas furnace (gas lines) should have active carbon monoxide detectors. These should be powered and placed near the floor to detect a gas leak that could lead to suffocation inside the home. If a carbon monoxide detector goes off, immediately shut off the furnace, close any gas lines (including the stove or other gas-powered appliances), and open all the windows.

Then call for emergency inspection and repairs.

Aztil Air Gas Furnace Repairs

If your furnace shows any of these signs, Aztil Air is here to help. We’ll help keep your home cozy and your furnace running safely all winter. Contact us online or call for emergency gas furnace repairs.

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What Our Clients Think Of Us


Perfect in every way… professional, knowledgeable , clean, communicative.
Albert Rodriguez did a great job!!!
Would highly recommend him!!!!
Response from the owner:Hi Gary, thank you for your kind words! We're so glad to hear that Albert did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana was able to diagnose and fix the problem. With my air c conditioner that two prior technicians could not. He left me with a feeling of confidence in his ability and I would request Dana for any future problems
Response from the owner:Hi Dennis, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Thanks Aztil for many years of service Tino was amazing did a great job on the ac units and was very professional I’m recommend Aztil for any ac needs.
Response from the owner:Hi Jose, thank you for your kind words! We're so glad to hear that Tino did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana Dussalt was awesome & very patient & courteous by ensuring our AC was functioning properly & explained in detail the issue that he resolved.
Response from the owner:Hi Sharron, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
ANTONIO MORENO services were a 10 where 5 was the highest!
Aztil is a great company where you can track your service teal time coming to your home. They’re right on time. They explain everything I’m impressed.
Response from the owner:Hi William, thank you for your kind words! We're so glad to hear that Antonio did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Albert is a great technician. He is very clean and courteous. I have been a customer of the company that they bought so it's been like a total of twenty eight years, and i'm very satisfied.
Response from the owner:Hi Mark, thank you for your kind words! We're so glad to hear that Albert did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Niko Garza completed a detailed diagnostic & flush of my home AC. Very professional and courteous. I highly recommend Aztil & Niko
Response from the owner:Hi Michael, thank you for your kind words! We're so glad to hear that Niko did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Paul gross was wonderful.
Response from the owner:Hi Diana, thank you for your kind words! We're so glad to hear that Pail did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Can I please 🙏 say ... a/c was down for about 14 hrs in a day in July 😡 then they sent there top star Danna & my man took care of everything !!!!!! 5 ☆☆☆☆☆
Response from the owner:Hi Darius, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana was great very helpful and knowledgeable.
Response from the owner:Hi George, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
I wanted to commend Dana Dussualt for his hard work at rectifying a substantial issue that I had with my HVAC system. It did require multiple visits but he stuck with it and figured out the issue and did get it resolved. Dana spent hours in the attic in the middle of summer working on getting this fixed. He is both a very hard worker and a pleasant individual. Dana is a credit to your company. In addition, the office staff worked with me in getting these repairs done by insuring we would get service on the date promised. Having no air conditioning in the summer is not a great experience. I have been an Aztil customer for many years.
Response from the owner:Hi Lyle, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana was on time and knew what he was talking about, highly recommend him.
Response from the owner:Hi Ginger, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Rhonda answered my call and was wonderful. Dana and Schuyler arrived within the hour and fixed my a/c problem. Cleaned everything up and would use Dana anytime.
Response from the owner:Hi Ricki, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Niko was fantastic... knowledgeable and professional... answered all my questions and did it with a smile... I would want to see him for all my service calls moving forward... thanks Niko!
Response from the owner:Hi Jim, thank you for your kind words! We're so glad to hear that Niko did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Jordan & Harold did a great job taking care of our system. Highly recommend them.
Response from the owner:Hi Janie, thank you for your kind words! We're so glad to hear that Jordan and Harold did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
The Aztil technician Dana was very professional, knowledgeable and courteous. He resolved my issue and made the visit seamless. .
Response from the owner:Hi Jeffrey, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Lazaro is an excellent Tech. Courteous and Professional. If possible ask for him for all your HVAC issues.
Response from the owner:Hi Les, thank you for your kind words! We're so glad to hear that Lazaro did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana was great. He was very knowledgeable. Did nice work Easy to understand. Highly recommended
Response from the owner:Hi Barry, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Jorge and Dave we’re extremely professional. The AC installation was done quickly and meticulously. I can’t recommend them enough!

I also want to give a shout out to Paul Gross. He was my initial contact with Aztil. He explained all my options to me and suggested the best unit for my home. Paul was able to get me a great price and I’m very grateful for his advice.
Response from the owner:Hi Wendy, thank you for your kind words! We're so glad to hear that Jorge and Paul did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Response from the owner:Hi David, thank you for your kind words and for being a valued customer.
Dana, my service tech did an amazing job to keep my AC up and running. He contacted me on his i, and was here in a flash.

He also updated me on the condition of the AC for the future, made some recommendations for me to consider.

Keep Dana on my service list and THANK YOU DANA!!!!
Response from the owner:Hi Jeanne, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana did a excellent job. He listened as to what was wrong as if he really cared. I would reccommend him to anyone. Very nice and respectable and he knew what he was doing.
Response from the owner:Hi Pat, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Niko was excellent. Very happy with his service. Explained everything and was very professional.

Yesterday no ac!! Yikes. Dana was the technician who did not leave our house until he discovered and fixed the problem. Believe me, he missed dinner and this was a Friday night. Couldn’t be happier. Dana was so professional and knowledgeable. So happy we bought from Aztil and have a service contract with them. If you ever think it’s not worth having the service contract in case of emergency, when you have no ac and it’s sweltering outside, you will be so happy you made a smart decision! Thank you Dana and Aztil.
Response from the owner:Hi E. R., thank you for your kind words! We're so glad to hear that Niko did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Ramon was very thorough.
Response from the owner:Hi Michael, thank you for your kind words! We're so glad to hear that Ramon did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Rafael
Was very informative, polite, and to the point in explaining warranty information, and what parts was needed for my air conditioner.

I look forward yo his next visit in 6 months.
Keeps us up to date.
Response from the owner:Hi Erlene, thank you for your kind words! We're so glad to hear that Rafael did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Ramon did an excellent job in servicing my air conditioners. He also called the office to get the permit issue resolved. He informed me that Aztil was recently sold and he is enthusiastic about the new management. I also see an improvement in the communication in the past month.
Response from the owner:Hi Michael, Thank you so much for your wonderful review! We're glad to hear that you had an excellent experience with our service. We pride ourselves on our knowledgeable staff, and it's great to know that Aztil was able to provide you with such great service. We appreciate your feedback and hope to see you again soon!
The service tech Ramon did an excellent job doing maintenance on my ac and fixed my plaster on top of the ac unit!! Highly recommend!!!!
Response from the owner:Hi Chris, thank you for your kind words! We're so glad to hear that Ramon did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
I scheduled a routine check up and Cody came to my home. He was so knowledgable and found issues with AC and fixed them on the spot. He also found a major issue on my roof and I immediately called the HOA. I will definitely be asking him to come back for my next check up

Excellent Customer service Kudos Cody !!
Response from the owner:Hi Evee, thank you for your kind words! We're so glad to hear that Cody did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
I appreciate the online appointment system and the follow up communication until the Tech arrives. Dana, the technician on my job was terrific. He was very thorough and courteous, willing to answer all of my questions with clarity. The only thing that keeps me from awarding a 5 was the price. The service was very satisfying and Dana was exemplary.
Response from the owner:Hi Brett, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Cody did an excellent job. He finished in a timely manner and answered the questions I asked him.
Response from the owner:Hi Benjamin, thank you for your kind words! We're so glad to hear that Cody did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
I scheduled a routine check-up. Aztil canceled on me and the next appointment was 3 weeks later, so I was not happy about that. However, when my technician Ramon showed up, he was very thorough and efficient. He explained what he was doing and made good suggestions to maintain my AC. I was very happy with his work.
Response from the owner:Hi Elizabeth, thank you for your kind words! We're so glad to hear that Ramon did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Dana came to my house today. So impressed! He was courteous and knowledgeable. Fixed the problem quickly! Five stars!.
Response from the owner:Dear Cheryl Feldman, thank you for taking the time to share your positive experience with Dana. We're delighted to hear that he provided courteous and knowledgeable service while fixing the problem efficiently. Your satisfaction is our top priority, and we appreciate your five-star rating. If you need any further assistance, please don't hesitate to reach out.
Albert Rodriquez was through and professional. Great service
Response from the owner:Hi Susan, thank you for your kind words! We're so glad to hear that Albert did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Great job by Barreto
Response from the owner:Hi Alejandro, thank you for your kind words! We're so glad to hear that Asiel did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Michael was amazing today on our emergency air conditioning needs. He went above and beyond to accomplish getting our unit up and running!!!
Response from the owner:Hi Denise, thank you for your kind words! We're so glad to hear that Michael did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Ramon was amazing !!!! Awesome job !!!
Response from the owner:Hi Kerry, thank you for your kind words! We're so glad to hear that Ramon did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Response from the owner:Hi Doris, thank you for your kind words! We're so glad to hear that Aztil did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Ramon Serpa is the best! He performed the maintenance check on my A/C and when I told him about my husband’s allergy problems, he suggested UV lights which would improve the air quality. He installed these for me explaining the process in detail. He is the best technician we have ever had with Aztil.
Response from the owner:Hi Susan, thank you for your kind words! We're so glad to hear that Ramon did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
I've been using Aztil for over 20 years across 4 homes in Florida. From general services to complete A/C replacements, I wouldn't trust anyone else. My recent service in Port St. Lucie with Nico was excellent and he was very helpful in going over all of my HVAC system and answered a few questions I had.
I highly recommend Aztil for any HVAC issues or general maintenance.
Response from the owner:Hi Ralph, thank you for your kind words! We're so glad to hear that Niko did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
I cannot speak highly enough of our super kind technician, Randy, who came out to assess our AC today. Randy took the time to walk us through photos of the issues in our AC and offered to take care of it ASAP as he already had the parts in his truck - LOVE the preparedness! Aztil Air Conditioning is superior and we will request Randy on a go forward basis.

UPDATE 6/17/25 - Exceptional Service from True Professionals - Highly Recommend!

We recently had our ducts cleaned and sealed, plus our dryer vent serviced by Jordan and Hero from Aztil Air Conditioning, and I cannot say enough good things about their work. From the moment they arrived, these two demonstrated exactly what professional service should look like.

What impressed us most was their commitment to education - they took the time to walk both my husband and me through every step of the process, explaining not just what they were doing, but why it mattered for our home's efficiency and air quality. It's rare to find technicians who are so patient and thorough in their explanations.

Beyond their technical expertise, Jordan and Hero showed genuine respect for our home and our comfort level throughout the entire job. They worked with care and consideration, treating our space as if it were their own. As homeowners, we've all had those experiences where workers leave you feeling uneasy - this was the complete opposite. We felt completely at ease having them in our home.

Their professionalism, kindness, and attention to detail set them apart in an industry where those qualities aren't always guaranteed. If you're looking for HVAC services you can trust, don't hesitate to call Aztil Air Conditioning. Jordan and Hero will take excellent care of you and your home.

Five stars - we'll definitely be calling them for any future needs!
Response from the owner:Thank you Jessica for your positive feedback. I'm glad you were happy with the support we provided. Please keep us in mind for any HVAC needs.
Rick was terrific. Knowledgeable fast, courteous. We hope if we need a/c work, he's the one who comes out.
Response from the owner:Hi Hal, thank you for your kind words! We're so glad to hear that Rick did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Very professional, knowledgeable, and accomplished the tasks requested..Would recommend to others.
Response from the owner:Hi Judy, thank you for your kind words! We're so glad to hear that Aztil did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Jordan was excellant. Went above and beyond listening and talking me through everything.
Response from the owner:Hi Mark, thank you for your kind words! We're so glad to hear that Jordan did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Thank you Alex who diagnosed my AC issue quickly,! your superior technical skills and customer service have not gone unnoticed. Alex made my experience a pleasant one, even though my AC motor went and it needs to be ordered, the good news is it’s under warranty🤷🏼‍♂️
Response from the owner:Hi Stephen, thank you for your kind words! We're so glad to hear that Alex did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.

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