(470) 200-3365
Heating Repair in Dunwoody, GA: heat pump outdoor unit on a raised stand beside a home

Heating Repair in Dunwoody, GA

Heating Repair That Brings the Warmth Back Fast

From dirty flame sensors to failed igniters and heat pumps stuck in defrost, we find the real fault and fix it right the first time.

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Our technicians who handle Heating Repair in Dunwoody, GA

Experienced HVAC Pros You Can Count On

HVAC service is about more than swapping parts. Dunwoody HVAC provides Dunwoody residents with complete care that addresses the visible symptom and the hidden wear behind it, from refrigerant charge verification to combustion analysis and static pressure testing.

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When the heat goes out in Dunwoody, GA, the clock starts ticking, and the diagnosis depends entirely on what kind of system is doing the failing. On a gas furnace, the single most frequent culprit is a flame sensor coated in oxide: the burners light, the sensor cannot prove the flame, and the board shuts the gas down three tries later and locks out. Close behind come cracked hot surface igniters, stuck pressure switches, clogged condensate traps on high-efficiency models, and blower motors that have quietly worn out. Heat pumps fail differently: a weak defrost cycle leaves the outdoor coil armored in ice, a failed reversing valve strands the system in cooling, and a dead outdoor unit leaves the electric backup strips carrying the whole house at several times the operating cost.

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The repair homeowners call us about most is Furnace Repair. If something has stopped working, start there.

Warning Signs for Heating Repair

The sooner you notice these red flags, the easier and cheaper the fix. Watch for these telltale signs:

  • The system starting and stopping every few minutes without warming the house
  • The thermostat calls for heat but the vents blow cold air or nothing
  • A heat pump's outdoor unit encased in frost or ice
  • Clicking and failed ignition attempts before the furnace gives up
  • Some rooms warm while others stay stubbornly cold
  • Burning, musty, or rotten-egg odors when the heat runs
  • Heating bills spiking while comfort keeps falling
  • Booming or banging at ignition, a sign of delayed burner light-off

Act Before It Gets Worse

A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. Don't wait, call (470) 200-3365 and we'll take a look right away.

Thermostat faceplate removed to test the heating call in Dunwoody, GA
Some no-heat calls end at the thermostat, where a loose wire can look exactly like a failed furnace.

What Goes Into Our Heating Repair

Guessing gets expensive on a cold night, so Dunwoody HVAC handles every heating call as a diagnosis first and a repair second. Our techs measure before they replace anything: microamp flame signal, igniter resistance, pressure switch response to actual inducer draft, capacitor and motor readings, plus charge and defrost checks when the system is a heat pump. On gas equipment, safety checks are built in, not an add-on. Gas connections are leak-tested, the heat exchanger is inspected, and venting is verified, because warm air from an unsafe furnace is not a fix.

Gas and electric furnaces, heat pumps, air handlers, boilers, and ductless systems from every major brand are all part of our daily work. Because the trucks carry the parts that fail most, including igniters, flame sensors, capacitors, inducer motors, and blower motors, most repairs are done before we leave. When a system has reached the end of its useful life, you will hear that from us plainly, along with real numbers for each option. Need heat back in Dunwoody? Call (470) 200-3365 and we can get someone to you today.

What to Expect From Our Heating Repair

We follow a proven process to ensure every repair and installation is completed to the highest standards.

1

Diagnosis and Safety Check

We pull the fault codes, then verify: flame signal, igniter resistance, pressure switch operation, motor and capacitor health, and charge and defrost on heat pumps, with gas connections leak-tested as standard.

2

Straight Answers & a Firm Price

Before we pick up a tool, we walk you through what broke, why it broke, and what it will cost. And if the findings, like a cracked heat exchanger or a dead compressor, point toward replacement, we are upfront about it.

3

The Repair Itself

Most heating repairs wrap up in one trip. The parts that fail most often, including igniters, flame sensors, pressure switches, capacitors, and motors, are already on the truck, so the heat is back on before we head out.

4

Final Testing

A repair is not done until the system proves itself. That means full cycles, temperature rise checked against the data plate, combustion and draft confirmed on gas equipment, and every safety control verified.

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Heating Repair FAQ

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Igniters, sensors, switches, and motors are worth repairing at almost any age. A cracked heat exchanger or a failed compressor on equipment past the fifteen-year mark usually tips the math toward replacement, especially with the efficiency gains of modern systems. We give you honest numbers either way. Call (470) 200-3365 for straight answers.
The burners are lighting, but the control board is not convinced they are. Typically that means a dirty flame sensor that can no longer prove the flame, and the board closes the gas valve as a precaution. Other possibilities include a weak igniter, a stuck pressure switch, or a clogged condensate trap on a high-efficiency unit, and we check each one in turn. Call (470) 200-3365 and we will end the lockouts in Dunwoody.
With a heat pump, a sudden jump often means the unit has stopped doing its job and the electric backup heat is carrying the house, which is far more expensive to run. With a furnace, look at short cycling, a weakening blower, or leaky ducts, all of which make the system burn more fuel for less warmth. Something has changed, and the bill is the first sign. Call (470) 200-3365 and we will find it in Dunwoody.
Light frost that clears during defrost cycles is normal. A unit encased in ice is not; it usually means a defrost control or sensor has failed, the charge is low, or airflow through the outdoor coil is blocked. Running it iced strains the compressor. Call (470) 200-3365 and we will diagnose the defrost system properly.

The Benefits of Professional Heating Repair

Heating repair carries the highest stakes in home comfort work because combustion is involved. A furnace that lights late booms gas vapor inside the heat exchanger and stresses the metal; a heat exchanger that cracks can pass combustion gases into the supply air; a flue that has stopped drafting sends carbon monoxide into the house instead of out of it, and none of these announce themselves in ways an untrained eye can catch. The diagnostic terrain is genuinely tricky too: a furnace that short-cycles might have a failing limit switch, or it might be protecting itself from a clogged filter, and cleaning a flame sensor without asking why it fouled leaves the next lockout already scheduled.

Instruments and judgment are what our experienced technicians bring to both sides of that problem. We measure the flame signal instead of assuming it, inspect the heat exchanger, verify draft at the flue, and check temperature rise against the data plate so the airflow matches the fire. With heat pumps, the defrost board, sensors, and reversing valve get tested before anyone condemns a compressor, and we look at whether the backup strips have been running up your bill for weeks. Each repair we complete is proven safe and correct over a full heating cycle, which is the standard you should expect from anyone working on the equipment that keeps your family warm.

Should You DIY or Call a Pro?

Simple checks are fine to DIY, but most heating and cooling repairs need professional tools, training, and experience.

FactorDIY AttemptProfessional Service
Carbon Monoxide An unseen hazard never gets tested Exchanger inspected, flue draft confirmed
Diagnosis Parts swapped on a hunch Readings taken before parts are replaced
Gas Safety Small leaks slip by undetected Every joint checked with a leak detector
Heat Pumps An iced coil blamed on the compressor Each defrost component checked in turn
Root Cause Quick fix, same failure next week Cause found, not just the symptom
Verification Called fixed after a single cycle Full cycles run, temperature rise confirmed
Gas furnace and PVC venting in a basement utility room in Dunwoody

Maintenance Tips for Heating Repair

Smart maintenance is almost always cheaper and easier than an early replacement. Here are our expert recommendations:

  • Test carbon monoxide detectors monthly and put one on every level of the home
  • Keep chlorine products, paints, and solvents away from the furnace, because their fumes corrode burners
  • Give the outdoor heat pump unit open space, free of snow drifts and plantings, so it can defrost
  • Keep the area around the furnace clear so the burner gets adequate combustion air
  • Swap the filter every month while the heat is running, since restricted airflow trips limits and shortens heat exchanger life
  • Book a fall tune-up so worn parts are caught before the first cold night
  • Call about booming at startup or new rattles right away, while the fix is still inexpensive

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The Dunwoody HVAC Promise

Every heating repair job we complete reflects our commitment to quality and customer satisfaction.

Safe, By-the-Book Installs

We size the system correctly, seal the duct connections, and verify the charge, so your family gets dependable comfort without safety risks.

No Surprises, No Pressure

We tell you exactly what you need and what it costs up front. No surprise charges and no selling you services you don't need.

Repairs That Last

Anyone can reset a breaker or swap a filter. We test the capacitors, motors, charge, and safeties so the real fault gets found and the repair actually lasts.

Your Dunwoody Neighbors

We're your neighbors, not a faraway call center. You'll deal with the same familiar faces every visit.

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Take action now and protect your home's comfort. Dunwoody HVAC is ready to help.

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