Aaron Plumbing provides furnace repair and replacement for homeowners throughout Roswell, Alpharetta, Sandy Springs, Milton, and the north Atlanta metro. Gas and electric furnaces, all major brands — same-day service with no emergency fees.
Furnace Problems We Fix
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No Heat
Furnace won’t start, pilot light issues, failed igniter, or tripped limit switch. We diagnose the cause and fix it — most ignition and control board issues are same-day repairs.
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Short Cycling
A furnace that turns on and off repeatedly without reaching temperature is short cycling — often caused by a dirty filter, a faulty flame sensor, or an oversized unit. We identify and fix the root cause.
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Blowing Cold Air
If the furnace runs but blows cool or lukewarm air, the burners may not be igniting or the heat exchanger may have an issue. We inspect the full system and give you a clear answer.
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Cracked Heat Exchanger
A cracked heat exchanger is a serious safety issue — it can allow carbon monoxide to enter the living space. If your CO detector has triggered or you smell fumes, call us immediately.
How Long Should a Furnace Last?
A well-maintained gas furnace typically lasts 15–20 years. Electric furnaces can last slightly longer. As a furnace ages past 15 years, repair costs tend to increase and efficiency drops — older units often have AFUE ratings of 78–80%, compared to 96–98% for modern high-efficiency units. If your furnace is 15 or more years old and facing a significant repair, the math often favors replacement. We’ll run the numbers for you — repair cost versus estimated remaining life versus the operating cost difference of a new high-efficiency unit — so you can make an informed decision.
Carbon Monoxide Safety
A cracked heat exchanger is the most serious furnace problem because it creates a carbon monoxide risk. CO is odorless and colorless and can be fatal at high concentrations. Every home with a gas furnace should have working CO detectors on each floor. If your CO detector sounds, leave the house immediately and call 911. After the all-clear, call us to inspect your furnace before you restart it. We check heat exchanger integrity as part of our annual maintenance service — it’s one of the most important checks we do.
Frequently Asked Questions
My furnace won’t turn on at all. What should I check first?
Check the thermostat settings (make sure it’s set to heat and the temperature is above room temperature), check the filter (a severely clogged filter can cause the system to shut down), and check the circuit breaker. If none of those fix it, call us — don’t attempt to troubleshoot the gas valve or ignition system yourself.
Can you come out for a furnace repair today?
Yes. We prioritize heating calls during cold weather. Call us at (770) 239-6628 and we’ll get there the same day in most cases throughout Roswell, Alpharetta, Sandy Springs, and surrounding areas. No emergency fees.
How often should a furnace be serviced?
Once a year, ideally before heating season begins in the fall. An annual tune-up includes cleaning the burners, checking the heat exchanger, testing the ignition system, verifying safety controls, and replacing the filter. It keeps the system running efficiently and catches problems before they become failures.