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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


Serviceman Dana Dussalt was excellent, courteous and outstanding.
Technician Ramon Serpa number One !
Niko was great. Highly recommend him.
I think it is indicative of the heart of a company when every person from that company who comes to work in your house and on your system is knowledgable, personable and treats your home with care. Aztil, what great people you have! Paul, Jorge, Dave, Jordan and Jalen, thanks for a terrific experience installing our new system, and cleaning and sealing our ducts. You all were so kind, knowledgable and careful!!
Cody was great! Very knowledgeable and friendly and went out of his way to complete a task today that some may not have
The Aztil is an Excellent Air Conditioning company Alex Molina
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Response from the owner:Hi Maria, 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.
Niko was terrific as always!!
We recently had a maintenance call. The next day the air conditioner stopped working. Our second technician was Dana Dusseault and we had an excellent service. He found the problem right away. He had a trick to find the water drainage ( which had been buried) We would highly recommend.
Michael did a great job! Thanks.
Thanks to Nico who did a great job today with our maintenance plan. When we had a repair issue in the past, Cody also did a great job helping us and also assisted us with our FPL surge claim
ANTONIO was reference as a Sr. Tech by Office Staff. When He arrived at my home he was immediately very professional and demonstrated that he was competent to do the heater replacement. I would request Antonio to do future service calls.
Response from the owner:Hi Leah, 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.
Excellent. Albert Rod. I excellent.
Juan Ortega was sent to my home to remedy my AC problem. He diagnosed the problem after about 10 minutes of testing and had it repaired shortly thereafter. He was professional, kind & compassionate. Thanks Juan!
Ramon is very kind and very knowledgeable!! He always shares information and always answers all of my questions. Thank you Ramon!!
Jordan and Jalen performed the aeroseal and Juan did an excellent job
Jorge Rivera was the technician that installed our new air conditioner unit. He was promo courteous, and did an excellent job installing our unit.
Rafael and Asiel installed my new A/C today. They were super. Everything went as planned. I am a happy camper.

12/5/25 Alex came for tuneup and fixed thermostat problem. Wonderful experience. 5 stars.

12.29.25 Alex came to fix a/c thermostat wiring problem. A/C did not put out heat. He fixed within 5 minutes. 5 stars.
Response from the owner:Hi Cihrhh, thank you for your kind words! We're so glad to hear that Rafael and Asiel did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Paul is an amazing tech he came on time completed the project and my house is cool again. I have been with Aztil for 18 years and only have good things to say and Paul is amazing.
Mr. King was amazing. Professional, clean and courteous.
Antonio Moreno is Excellent! Professional, courteous and caring.
Best part of Aztil- our service tech Antonio, Nick, and Dana!! Such a professional and kind young men. Thanks!!
Michael King was an EXCELLENT service technician. He was very polite and was able to pinpoint the problem. He was not trying to pressure us to get anything done other than the issues we were having. We have been with Aztil for over 20 years servicing both of our homes and having Michael as our technician by far has been the best experience.
Aztil always comes through even at the last minute. Their technicians are very knowledgeable and respectful and even took out my old filter to the dumpster!! Thank you
Elder was terrific. Knowledgeable and efficient
A pleasure to work with
Jordan Jalen were here and I was impressed by their performance and professional attitude. Thank you and have a great Holiday🎄
Niko was extremely helpful solving our emergency…The capacitor stoped working!!
Very good. Lazaro was courteous and professional.
Dana is a great Technician. He is very knowledgeable and personable in addition to being extremely thorough. He did my A/C check up and kept me informed as he proceeded through the process. Very pleased with Aztil and have always been very happy with their technicians and sercvice.
Response from the owner:

Dear Richard Grossman,

Thank you for your glowing review! We're so glad to hear that you had such an excellent experience with Lazarro and Antonio. We pride ourselves on providing top-notch service and are thrilled that you have chosen to sign a 5 year contract with us. We look forward to continuing to provide you with the best service possible.

Thank you again for your kind words.

Sincerely,
AZTIL
The gentlemen that came to replace my air conditioner were very friendly and pleasant. I was pleasantly surprised at the speed and efficiency at which they worked. Jorge Rivera did a great job and I will commend Aztil Air to everyone. Thank you.
Dana was great on time very professional
Paul is friendly and kmowledgable
Response from the owner:Hello Cheryl. Thank you for your feedback. We appreciate your business.
Our AC just crapped out on a Sunday morning. We called and Dana was in contact with us immediately. He called, we gave him a brief run down of the issue. He arrived promptly, was professional, found the issue, fixed it, tested the system and had us back up and running in about an hour. He also
let us know our service contract was expiring in a couple of months so we renewed it on the spot. We HIGHLY recommend them for your AC needs.
The service tech Cody did an excellent job doing the maintenance!! Very friendly and courteous, 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.
Technician Michael King was very thorough and friendly. He spent hours painstakingly explaining and figuring out why my air conditioning and heating unit wasn’t working until he solved the mystery.
Michaels amazing!!
Niko was pleasant, capable and informative. I’m greatful to have in service my AC unit.
Antonio was great, here on time and provided 6 month service- we renewed our contract for another year. A dollar a day is a great deal!!
From the moment Paul arrived, his professionalism and knowledge were on a completely different level. He carries himself with a level of expertise and integrity that you rarely see anymore. Paul doesn’t just do his job—he exceeds every standard of customer care, clarity, and skill.

Honestly, he’s so top-notch that he could be running his own company. The way he explains everything, answers every question with patience, and makes sure you fully understand your options is beyond impressive. You can tell he takes pride in his work, and it shows in every part of the experience.

Thank you, Paul, for setting such a high standard. Companies are lucky to have you—Darcy appreciates you more than you know!!! My husband and I We love Paul!
Elder was great 5 stars
Response from the owner:Thank you for your review, Lorraine. We appreciate your feedback and are glad that Kenneth and Nick were able to help you with your issue.
Antonio was early which was fine with me. He was very professional and personable, explained everything along the way.
And even finished up with the tune up to save me from having to make an appointment for the following day.
Response from the owner:Hi Walter, thank you for your kind words! We're so glad to hear that Michael and Skyler did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Antonio is awesome. Super helpful and friendly. Aztil is very responsive. Highly recommend. A+++.
Technician Elder did an excellent job

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