Heat pump or furnace? That is the first thing that matters when the heat quits in Dunwoody, GA, because the two fail in completely different ways. Heat pumps tend to freeze up when defrost stops working, get stuck in cooling when a reversing valve fails, or quietly lean on the electric backup strips, at several times the normal operating cost, when the outdoor unit dies. Gas furnaces usually come down to the flame sensor: once oxide coats it, the burners light but the flame cannot be proven, so the board cuts the gas and locks out after three tries. After that, the usual suspects are cracked hot surface igniters, stuck pressure switches, clogged condensate traps on high-efficiency models, and blower motors at the end of their life.
Dunwoody HVAC runs every no-heat call diagnosis-first. Our experienced technicians read the board's fault codes and then verify them, measuring flame signal in microamps, testing igniters for resistance, confirming pressure switch operation against actual inducer draft, metering capacitors and motors, and checking refrigerant charge and defrost operation on heat pumps. Gas-side visits include the safety fundamentals as standard practice: we leak-test connections, inspect the heat exchanger, and verify venting, because a heating repair that is not verified safe is not finished.
Furnace, heat pump, air handler, boiler, or ductless unit, from any major brand, we service it. Stocking igniters, flame sensors, capacitors, inducer motors, and blower motors on every truck means most homes are warm again the same visit. And if a repair no longer makes sense for aging equipment, we tell you so honestly and lay out the options with real numbers. Call (470) 200-3365 for heating repair anywhere in Dunwoody, and we will get the warm air moving today.
Our most requested repair is Furnace Repair in Dunwoody. Start there if your system isn't running right.
Warning Signs for Heating Repair
The sooner you notice these red flags, the easier and cheaper the problem is to resolve. Here are the most common indicators that it's time to call a professional:
- The system starting and stopping every few minutes without warming the house
- Cold air, or no air at all, when the thermostat calls for heat
- An outdoor heat pump coil that stays iced over
- Clicking and failed ignition attempts before the furnace gives up
- Cold rooms in one part of the house while others are comfortable
- Strange smells from the vents, especially rotten egg or burning
- Higher heating bills with less comfort to show for them
- A loud boom when the burners light, which points to delayed ignition
Don't Wait for a Total Failure
Left unchecked, even a small fault or temperature swing often signals a system working its way toward a breakdown. Don't wait, get Dunwoody HVAC on the phone at (470) 200-3365 and we'll take a look right away.
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Get Help: (470) 200-3365Your Heating Repair Questions Answered
Why Hire a Professional for Heating Repair?
Combustion is what makes heating repair different from the rest of home comfort work. A late light-off booms unburned gas inside the heat exchanger and stresses the metal each time it happens. A cracked exchanger can leak combustion gases into the air your family breathes, and a flue that stops drafting pushes carbon monoxide into the living space instead of outdoors. None of these problems make themselves obvious to someone without training and instruments. Diagnosis has its own traps as well. Short cycling can point to a failing limit switch or to a furnace protecting itself from a clogged filter, and cleaning a fouled flame sensor without asking why simply sets up the next lockout.
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 blower speed and burner output are matched. With heat pumps, the defrost board, sensors, and reversing valve are 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.
What to Expect From Our Heating Repair
Our systematic workflow delivers thorough, lasting results on every job. Here's exactly how the heating repair process unfolds:
Diagnosis and Safety Check
Every visit begins with measurements, not guesses: flame signal, igniter resistance, pressure switch response, and motor and capacitor health, plus refrigerant charge and defrost on heat pumps. Gas connections are leak-tested as standard.
Straight Answers & a Firm Price
Before any repair begins, 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.
Same-Visit Repair
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.
Final Testing
We run complete heating cycles, measure temperature rise against the data plate, confirm safe combustion and draft on fuel-fired equipment, and verify every safety control before we go.
Heating Repair Prevention Tips
A little routine maintenance goes a long way toward avoiding a mid-season breakdown. Start with these practical measures our team relies on:
- 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
- Keep heat pump outdoor units clear of snow, leaves, and shrubs so defrost can do its job
- Avoid crowding the furnace with storage, which can starve the burners of air
- Change the filter monthly in heating season; starved airflow trips limit switches and cracks exchangers early
- Schedule a professional tune-up every fall before the first cold snap finds the weak parts
- Call about booming at startup or new rattles right away, while the fix is still inexpensive
DIY vs. Professional Heating Repair
Some simple checks are suitable for DIY, but most heating and cooling repairs benefit from professional tools, training, and experience. Here's a comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Carbon Monoxide | An unseen hazard never gets tested | Draft and heat exchanger checked every visit |
| Diagnosis | Error code guessing games | Every component tested with a meter |
| Gas Connections | A loose fitting goes unnoticed | Instrument leak testing as standard |
| Heat Pump Faults | Defrost faults mistaken for dead units | Defrost controls and reversing valve tested |
| Root Cause | Symptom treated, problem left behind | The reason it failed tracked down |
| Final Testing | It lit once, good enough | Temperature rise measured over full cycles |
Talk to a Heating Repair Expert
Don't let a failing system get worse. Call Dunwoody HVAC now for prompt, professional service.
Get Help: (470) 200-3365Heating Repair Across the Dunwoody Area
Our technicians handle heating repair throughout Dunwoody and the surrounding communities, with the same upfront pricing everywhere we work.