Furnace Repair in Buford & North Georgia

If your gas furnace won't light, blows cool air, short cycles or makes new noises, Southeast repairs it. We diagnose the cause first, quote the repair before we start, and stand behind the work across Buford and the surrounding communities.

What does furnace repair cover?

This page is about gas furnaces: natural gas or propane, standard or high-efficiency, whether the furnace is your only heat or the backup half of a dual-fuel system with a heat pump. If your home heats with a heat pump and electric strips instead, our heating repair page covers the whole lineup.

Furnace repair means finding and fixing the part that stopped the heating cycle. The parts we replace most:

• Hot-surface ignitor, the element that glows to light the burners.
• Flame sensor, the rod that proves the flame is there so the gas valve stays open.
• High-limit, rollout and pressure switches, the safeties that shut the furnace down when it overheats or can't vent.
• Inducer motor, the small fan that clears exhaust before ignition.
• Blower motor and capacitor, which move the warm air through the house.
• Control board, gas valve and thermostat wiring.
• Condensate trap, drain or pump on high-efficiency furnaces.

We service all major furnace brands. We don't work on oil furnaces, boilers, mobile-home furnaces or commercial units, and we'll say so on the phone so you can find the right company fast.

What are the signs my furnace needs repair?

Most furnace problems announce themselves. Here's what homeowners in Buford, Sugar Hill and Lawrenceville describe when they call, and what it usually means:

• Clicks, but no flame. The ignition sequence is starting and stopping. Usually an ignitor, a flame sensor or a pressure switch.
• Blower runs, air is cool. The burners aren't lighting, or they're shutting off early. The furnace is protecting itself by locking out.
• Runs a few minutes, stops, repeats. Short cycling. Often overheating from a clogged filter or a failing limit switch.
• A boom at startup. Delayed ignition: gas is pooling before it lights. Worth a call before the next one.
• Squeal, grind or rattle. Blower bearings, a loose blower wheel or an inducer on its way out.
• Blinking light on the board. That's an error code. Note the pattern; it helps us.
• Water near the furnace. A high-efficiency furnace with a blocked drain.
• Burning-dust smell that doesn't go away. The first run of the season smells for a few minutes. If it keeps up, something's overheating.

If you smell rotten eggs, don't troubleshoot. Leave the house, call your gas provider, and then call us. We'll find the leak once the utility has made the area safe.

Why do furnaces fail in North Georgia?

Our furnaces have an unusual job. They sit idle from spring to late fall, collecting dust, humidity and the occasional spider in the vent, then a cold front rolls through and they're asked to run for hours at a stretch. Idle time is what kills flame sensors and ignitors; hard running is what finds the weak capacitor and the clogged filter. Furnaces in attics and crawlspaces also see temperature swings and dust that a basement furnace never would.

A few failures deserve their own explanation:

Can a dirty flame sensor really shut down the whole furnace?

Yes, and it's the most common no-heat call we run. A thin coat of dust insulates the sensor, the control board decides there's no flame, and it closes the gas valve within seconds. The fix is cleaning or replacing a small part. The cause is often a filter that should have been changed months ago.

What happens when the filter is clogged?

Airflow drops, the heat exchanger gets hotter than it's designed to, and the high-limit switch trips to stop it. Do that a few hundred times over a couple of winters and the metal fatigues. That's how a filter problem becomes a heat exchanger problem.

Can a cracked heat exchanger be repaired?

No. The heat exchanger is the metal wall that keeps combustion gases, including carbon monoxide, separate from the air in your ducts. A crack can't be patched or welded. The options are replacing the exchanger, which is major work, or replacing the furnace. We inspect it and show you what we found before you make any decision.

How does a Southeast furnace repair visit work?

Call or text (770) 265-8308 or book online, and our office calls or texts to confirm. We try to answer calls 24/7 and aim to respond within 24 hours. We don't promise an arrival time on the spot; on the first cold morning of the year, every furnace company in the area is busy, and we'd rather give you an honest window than a hopeful one. Southeast Family Plan members get priority in that queue. For a furnace that's down on a cold night, our emergency heating repair page explains how after-hours calls work.

On site, the technician starts with your description, then reads the board's error history, watches a full ignition sequence, and tests the pieces in order: inducer, pressure switch, ignitor, gas valve, flame sensor, limit switches, blower and capacitor. They check gas pressure and airflow, and they inspect the heat exchanger. The point is the root cause. A furnace that got a new ignitor last year and needs another one has a different problem than the ignitor.

You get the finding in plain words, the failed part in your hand if it helps, and the repair price before any work starts. If a part has to be ordered, you'll know the wait before you decide.

When a repair doesn't make sense, we tell you, and we tell you why. We don't decide by age. We weigh the repair cost, the quality of the original installation, the furnace's overall condition, what's likely to fail next, warranty and parts availability, and how long you plan to stay in the house. A newer furnace that was installed badly can be a replacement candidate; an older furnace with one failed part and a clean heat exchanger often isn't. If replacement is the better call, we set up a free replacement estimate, and you decide on your own schedule. Our repair or replace article lays out the same logic we use in the field.

Southeast is family owned and locally owned, based in Buford since 2022, licensed in Georgia under CR110452, and rated 5.0 on Google across 979 reviews as of September 2026. If a problem is caused by our workmanship, Southeast will return and correct it at no charge.

What does furnace repair cost?

The diagnostic visit is $79. It pays for the trip and the testing, and it's typically charged; we don't advertise it as free with a repair, because we don't want to set an expectation the technician can't keep. The repair itself is quoted on site, before we start, and depends on the part and the labor involved. We don't post furnace repair prices online because the same symptom can be a small part or a big one, and a number on a website would only be a guess.

• Family Plan members save 15% on qualifying repairs and pay no after-hours charge. The plan is $149 a year for the first system, $109 for each additional system, and includes two maintenance visits. See the Family Plan.
• Non-member after-hours pricing varies. We confirm it before we dispatch, never after.
• If the answer is a new furnace, heating systems finance through Service Finance from $59 a month with credit approval, and there's currently up to $1,000 off a new system; some restrictions may apply. Details on our financing page.

Repairs that come from a neglected filter or a dirty burner are also the easiest ones to prevent. A seasonal furnace maintenance visit catches most of them.

Book furnace repair in Buford and the surrounding communities

When the furnace quits, Book Service online or call or text (770) 265-8308. Our office will confirm your appointment and tell you honestly when we can be there. If the repair turns into a bigger decision, our furnace replacement page explains the options, and the full lineup of what we do for heat starts at heating services.