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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


Excellent
Aztil Air Conditioning4.6
Based on 2059 reviews
Ola Oduola
13 hours ago
Michael was professional, courteous and very knowledgeable. He’s definitely my go to technician for my HVAC at Aztil. Michael was professional, courteous and very knowledgeable. He’s definitely my go to technician for my HVAC at Aztil. Update: 06/30/26- I am pleased with Aztil, from the service reps, to the technicians (Michael and others),they are incredibly customer friendly, accommodating and very respectful of our home. Michael detailed explanations of service recommendations from his last service call prompted my service request for him. Job was expertly completed with no additional concerns. Pictures of what was done and parts replaced were emailed to me for my review. Keep up the good work, Aztil!
Paul came to check the A/C compressor and handler. Took pictures and showed me. Both units were disgustng.. He gave me the amt of replacing. I Absolutely agreed. Then Neraldo and another Technician came and installed the AC units. Next Jordan and Adrian came and cleaned all vents and ducts. All 5 of them were excellent and friendly. Also gave me the info on what was being done. 5 stars for each one of them. Highly recommend I have had a Dual Inverter installed in my back room. Jorge did the install and was Terrific. He worked his butt off and in the heat. David his helper was on the go the whole time. This is my 2nd AC install with Aztil AC and I would Highly reccommend them. They are polite, efficient, and hard workers. Thank you So Much Jorge and David. If I could go over 5 I would give you 10 stars.
Response from the owner:Hi Barbara, thank you for your kind words! We're so glad to hear that Paul, Neraldo, Jordan and Adrian did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Paul was our service technician, Paul is the definition of professionalism and excellence. His elite customer service, outstanding work ethic, and unwavering dedication make him an incredible asset to Aztil Air Conditioning. He consistently goes above and beyond, ensuring every job is completed with precision, care, and attention to detail. What truly sets Paul apart is his ability to balance the responsibilities of what seems like two jobs while maintaining a positive attitude and delivering exceptional results every time. His knowledge, reliability, and commitment to customer satisfaction are second to none. Paul should be the face of this company because he represents everything a customer hopes for in a service professional, Paul is honest, hardworking, respectful, and genuinely committed to excellence. If every technician provided the level of service that Paul does, Aztil Air Conditioning would continue to set the gold standard in the industry. Thank you, Paul, for your outstanding service. You are truly an elite professional!
Response from the owner:Thank you for recognizing Paul's exceptional service, Janquella! We're thrilled to have him on our team and truly appreciate your kind words. He embodies the dedication and professionalism we strive for. Your support and feedback mean the world to us!
Martha Jo Blake
2 days ago
Response from the owner:Hi Martha, 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.
Kevin McKeefrey
3 days ago
Dana was very efficient and professional. He was courteous to my Mom and we appreciate his timely response.
Response from the owner:Thank you for your kind words, Kevin! We're thrilled to hear that Dana provided such excellent service to you and your mom. We appreciate your feedback!
Jan Wagner
4 days ago
Dana my service technician was great! Not only was he early but he was very nice, efficient, and informative.
Response from the owner:Thank you for your fantastic review, Jan! We're thrilled to hear that Dana provided you with exceptional service. We'll be sure to share your kind words with him!
Laura B
4 days ago
Landon and his partner were amazing. Polite and professional even after a very long hot day installing the new AC system
Response from the owner:Thank you so much for your kind words, Laura! We're thrilled to hear that Landon and his partner provided you with excellent service, even on a tough day. Your comfort is our priority, and we truly appreciate your feedback!
R. Mullen
5 days ago
Dana did a great job and knew what he was doing! Found our problem right away!
Response from the owner:Thank you for your kind words, R. Mullen! We're glad Dana could assist you and pinpoint the issue quickly. Your satisfaction means a lot to us!
Nancy R Tirado
5 days ago
I truly made a great choice with Aztil! Ramon explained to us….. everything about the condition, the maintenance and outcomes… my confidence is 10 out of 10; thanks Ramòn
Response from the owner:We're thrilled to hear that you had such a positive experience with Ramon, Nancy! Your confidence means the world to us. Thank you for choosing us!
Ron Jarecki
5 days ago
Aztil thank you for sending TINO to do my T up he was excellent very professional an friendly
Response from the owner:Thank you for your kind words, Ron! We're thrilled to hear that Tino provided excellent service. We appreciate your feedback and look forward to seeing you again soon!
Merie Helm
6 days ago
Thank you Aztil for the great service!
Response from the owner:We're thrilled to hear you had a great experience, Merie! Thank you for choosing Aztil, and we look forward to serving you again!
MEDINA DIANA
7 days ago
Ramon checked my ac and made sure everything was in working order. He is a great asset to your company.
Response from the owner:Thank you for your kind words, Medina! We're thrilled to hear Ramon provided excellent service. We'll be sure to pass along your compliments to him!
Gerald Zehme
1 week ago
Brandon Brown came out to evaluate my AC. He was very kind and patient. I highly recommend using Aztil!
Response from the owner:Thank you so much for your kind words, Gerald! We're thrilled to hear that Brandon provided great service. Your recommendation means a lot to us!
Jerry Ingram
1 week ago
Response from the owner:Thank you so much for your wonderful review, Jerry! We're thrilled to hear you had a great experience. Your support means a lot to us!
steve
1 week ago
TIno is a great tech & very friendly. He arrived within the time window I was told by the office & did the tune up on my AC.
Response from the owner:Thank you for your kind words, Steve! We're glad to hear Tino provided friendly and timely service during your AC tune-up. We appreciate your feedback!
Doris Shankle
1 week ago
Lazarus was polite, professional, and efficient.
Response from the owner:Thank you for your kind words, Doris! We're thrilled to hear that Lazarus provided you with such great service. Your satisfaction is our top priority!
Judith Vile
2 weeks ago
Michael King He was terrific knowledgeable explained in detail was a real treasure to Aztil
Lisbet Calero
2 weeks ago
Jordan and Elkin are great , we did a good job , they are very respectful , professional thanks and God bless them
Response from the owner:Thank you for your kind words, Lisbet! We truly appreciate your feedback and are glad to hear that you had a positive experience with Jordan and Elkin. Your support means a lot to us!
Cheryl Troup
2 weeks ago
Brandon Brown was very helpful an and very knowledgeable! Brandon took the time to explain everything to me. I highly recommend him. He went above and beyond. Thank you for sending Brandon!!
Response from the owner:Thank you so much for your kind words, Cheryl! We're thrilled to hear that Brandon provided you with such excellent service. We'll be sure to pass along your praise to him!
Darrell Johnson
2 weeks ago
I had just returned home after having back surgery and after walking in my front door, I found the inside of my home warmer than normal. Now I will admit , I do keep my AC set at 72 but when I checked my thermostat, it was showing the interior temperature to be at 79 degrees which was definitely quite noticeable. I then did the normal checks to make sure that everything was running and everything appeared normal but the house was just not cooling. I called my “GO-TO” company Aztil I explained my situation. I feared that I would have to wait a few days for a tech when the representative told me that he could have a tech at my home within an hour. Sure enough, almost an hour later, the technician, Michael, showed up. Let me say that he was absolutely fantastic. I explained what was going on and he went right to work. He checked everything possible from the inside air handler, the outside unit, Freon levels, capacitors and even went up in the attic to check on all of the ductwork. Everything seems to be working fine until he made a decision to check the actual thermostat itself. After removing and making attempts to reset the system , he determined the thermostat was bad and needed to be replaced. He had a new one in his company truck that he retrieved and replaced the old one. Once that was done, my ac kicked on and within an hour, I was back to my favorite temperature. Thanks Michael for an outstanding job and definitely went over everything possible to make sure my ac was running great. A big shout out to Aztil for such great service and having the ability to send out a technician on the same I made the call . Your company and your techs are truly the best!
Response from the owner:Hi Darrell, we're so glad to hear that Michael was able to get your AC back to your favorite temperature so quickly! Thank you for your kind words and for choosing Aztil. If you need anything else, just give us a shout!
bonnie soffin
2 weeks ago
Brandon Brown is exceptionally professional, patient , thorough and personable. I recommend this fine gentleman for service at any time . Thank you for sending him out to my home. Sincerely, Bonnie Soffin
Response from the owner:Thank you so much for your kind words, Bonnie! We’re thrilled to hear that Brandon provided you with excellent service. We appreciate your recommendation and look forward to serving you again in the future!
Howard Laichter
2 weeks ago
Antonio was here on time, very informative, fixed my AC with professionalism. Would recommend him to anyone needing their AC fixed.
Atzil installed an a/c last year. It was such a pleasant experience. Today, Brandon a service technician arrived to service system. He was so efficient, polite and a knowledgeable. This experience was also a pleasant experience. I can’t praise Atzil enough for their prices, experience and customer service.
Response from the owner:Thank you so much for your kind words, Patricia! We're thrilled to hear that both your installation and service experiences were so positive. Our team works hard to provide excellent service, and we truly appreciate your feedback. We look forward to serving you again in the future!
Red Dunn
2 weeks ago
I learned about Aztil AC visiting the Home Show in West Palm. I'm a first time customer and very satisfied with the service. Antonio Moreno was very professional and did a very thorough job of cleaning and testing my A/C unit.
Response from the owner:Thank you for your kind words, Red! We're thrilled to hear that you had a great experience with Antonio and our services. We appreciate your kind words and look forward to serving you again!
Dana was very professional. Neat and very pleasant
Response from the owner:Thank you for your kind words, Maureen! We're thrilled to hear that Dana made such a positive impression. We appreciate your feedback!
Jeanne Friedman
2 weeks ago
On 6/15/2026, Lazaro installed 2 replacement bulbs on my AC handler. He was knowledgeable, efficient, and demonstrated exemplary customer service skills.
Response from the owner:Thank you for your kind words, Jeanne! We're thrilled to hear that Lazaro provided you with excellent service. Your satisfaction is our top priority, and we appreciate your feedback!
Donna Simon
2 weeks ago
Thank you again to Antonio! Best technician! On time, professional & friendly. Solved our problem. We are so appreciative!
Response from the owner:Thank you so much for the kind words, Donna Simon! We are so glad to hear that Juan Ortega provided excellent service. He is indeed an asset to our company and we appreciate your feedback.
Ramon R was not only on time but early because of excellent planning on his part well done sir! As for the work, perfection. He knew all aspects of the job and performed it almost instantaneously so I cannot say enough great about this service technician thank you again, he is the reason why I now have a service contract, with service like that absolutely I would love to have a contract so thank you again for all your help!!!
Response from the owner:Thank you so much for your review! We're thrilled to hear that Ramon provided such exceptional service and that you chose to start a service contract with us. We appreciate your trust and look forward to continuing to serve you!
David Winkley
3 weeks ago
Alberto and Roberto great job
Response from the owner:Thank you for your kind words, David! We're glad to hear you had a great experience with Alberto and Roberto!
Matt Dubrowski
3 weeks ago
Great work!
Response from the owner:Thank you so much, Matt! We really appreciate your support!
Anne Haight
3 weeks ago
Jordan and Jaylan were most professional, hard-working, courteous, and efficient. We are most pleased with the quality of their work.
Response from the owner:Thank you for your wonderful feedback, Anne! We're thrilled to hear that Jordan and Jaylan made such a positive impression. We'll be sure to pass along your compliments to them!
Darci Dion
3 weeks ago
Response from the owner:Thank you so much for your amazing review, Darci! We're thrilled to hear you had a great experience. Your support means the world to us!
Regulo Bohorquez
3 weeks ago
He was in time,very efficient,and nice conversation,exelent job Michael King, you are the best,tanks you, I recommend AZTIL whit confidence.
Response from the owner:Thank you so much for your kind words, Regulo! We're thrilled to hear that you had a great experience with Michael. Your recommendation means a lot to us!
Harolyn Glicker
3 weeks ago
Michael
Clarence B.
3 weeks ago
Tino C. did a great job performing my A/C system tune-up maintenance. He did a thorough job and explained the maintenance tasks he performed. He is very nice and personable.
Response from the owner:Thank you for your feedback, Clarence! We're thrilled to hear that Tino provided excellent service and made sure to explain the maintenance tasks. We appreciate your kind words and look forward to serving you again!
WeeklySMUpdates
3 weeks ago
Antonio came out with punctuality and pure professionalism within a strong timely manner. He even provided future recommended maintenance to ensure our system stays operating proficiently.
Response from the owner:Thank you for your kind words! We're thrilled to hear Antonio provided you with professional service and valuable maintenance tips. Your satisfaction is our priority!
Edward
3 weeks ago
Response from the owner:Thank you so much for your 5-star review, Edward! We're thrilled to hear you had a great experience. Your support means the world to us!
David Kendle
3 weeks ago
Response from the owner:Thank you for your 4-star review, David! We're glad you enjoyed your experience and appreciate your feedback. We’re always striving to improve, so if there’s anything we can do to make your next visit even better, please let us know!
LAWRENCE SMILEY
3 weeks ago
Excellent service.
Response from the owner:Thank you so much for your kind words, Lawrence! We're thrilled you had a great experience. We look forward to serving you again!
Fred Grimaldi
3 weeks ago
Elder great job
Response from the owner:Thank you so much for your kind words, Fred! We're thrilled to hear that you had a great experience. Your support means a lot to us!
Toya Brown
3 weeks ago
Elder was very professional and informative.
Response from the owner:Thank you for your kind words, Toya! We’re glad to hear that you had a positive experience with Elder. Your feedback is much appreciated!
Barbara Nugent
3 weeks ago
Alex Molina arrived promptly and was very courteous and pleasant. He did an excellent job cleaning the air ducts.
Response from the owner:Thank you for your feedback, Barbara! We're thrilled to hear that Alex provided prompt and courteous service while doing an excellent job with your air ducts. We appreciate your support!
Clark Sprague
3 weeks ago
Response from the owner:Hi Clark, 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.
henry coleman
3 weeks ago
The technician was fast ands efficient Vert exoeriinced
Response from the owner:Thank you for your kind words, Henry! We're glad to hear our technician met your expectations. We appreciate your feedback!
Steven Wasserman
3 weeks ago
Tino was great professional and friendly long time Aztil customer very satisfied
Response from the owner:Thank you for your kind words, Steven! We're thrilled to hear that Tino provided you with great service. We appreciate your loyalty as a long-time customer!
Norma Brown
3 weeks ago
Alex was very professional and knowledgeable. Quickly diagnosed the issue and Repaired the A/C unit. I would call Aztil again if needed and recommend to my neighbors.
Response from the owner:Thank you so much for your kind words, Norma! We're thrilled to hear that Alex was able to assist you so efficiently. Your recommendation means a lot to us, and we're here whenever you need us!
Tricia Lofstead
3 weeks ago
Elder did a great job with our A/C maintenance. He was professional, thorough, and courteous. Highly recommend!
Response from the owner:Thank you for your kind words, Tricia! We're thrilled to hear that Elder provided you with excellent service. Your recommendation means a lot to us!
Jon Baran
3 weeks ago
Alberto and Roberto were excellent. Diana great job
Response from the owner:Thank you for your kind words, Jon! We're thrilled to hear that Alberto, Roberto, and Diana provided you with excellent service. Your feedback means a lot to us!

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