Furnace Repair in Atlanta

Furnace problems we fix across metro Atlanta

Atlanta winters are mild until they aren't — a January or February freeze drops the metro below 25°F and every marginal furnace in the city fails the same weekend. The repairs behind those calls are remarkably consistent:

• Hot surface ignitor ($150–$475). The most common no-heat call. Ignitors are fragile ceramic parts with a finite life; the furnace clicks, never lights, and blows cold air.
• Flame sensor ($150–$475). A dirty sensor shuts the burners off seconds after ignition — the furnace lights, dies, retries, and gives up.
• Limit switch / overheating. Restricted airflow from a dirty filter or weak blower trips the high limit. The fix is airflow, not just the switch.
• Inducer motor ($425–$1,150). The draft fan that clears combustion gases; failure shows as a furnace that starts its sequence and stalls.
• Gas valve ($300–$800) and control board ($325–$950). Less frequent, more expensive — diagnosed by following the ignition sequence with a meter.
• Heat exchanger ($1,500–$3,500). The safety-critical one. A crack means the furnace is shut down, and at that price on an older furnace, replacement is usually the right answer.

October to February: Atlanta's furnace season

The pattern every year: furnaces sit idle from March through September, then the first cold snap in October or November lights them up and the ignitors and flame sensors that were borderline in spring fail on cue. The smart money books a heating check in October — the same visit that catches a weak ignitor for $200 avoids the emergency call during a freeze week when every company in Fulton and DeKalb is booked out. If your furnace is already blowing cold air, our symptom guide covers the safe checks you can do yourself.

Carbon monoxide and the heat exchanger

Gas furnaces burn fuel inside a metal heat exchanger and keep the combustion gases sealed away from your air. When that metal cracks — from years of expansion and contraction, accelerated by overheating from dirty filters — carbon monoxide can enter the airstream. Symptoms of a CO problem are headaches and nausea that ease when you leave the house; a CO detector alarm; or a technician finding flame rollout or a visible crack. Any of these means the furnace goes off until it is fixed. Atlanta homes with gas heat should have a CO detector on every floor and outside sleeping areas — test them when you change the clocks.

Furnaces in older Atlanta homes

Intown neighborhoods — Decatur, Grant Park, Virginia-Highland, East Atlanta — are full of 1920s–60s homes where the furnace has been replaced into a basement or crawlspace two or three times, often with venting and gas lines that predate current code. These installs work, but they deserve a closer look: flue condition, combustion air, and whether the equipment is oversized for the house (a very common cause of short cycling in small bungalows). The 1980s–2000s subdivisions across Cobb and Gwinnett have the opposite profile: straightforward attic or closet furnaces now hitting the 20-year mark where heat exchanger and inducer failures cluster.

Repair or replace the furnace?

Furnaces in the Atlanta climate typically serve 15–20 years — longer than the air conditioners they share a blower with, because heating hours are fewer. Repair makes sense on anything under 12 years with a sub-$600 part. Replacement enters the conversation at a cracked heat exchanger, at any repair over $1,000 on a 15+ year old unit, or when the AC side is also due — matched systems share the blower and often the controls, so doing both at once is usually cheaper than two separate jobs.

No heat? Call +1 (229) 215-6071 — same-day appointments when a technician is available in your area.