Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterFast, Reliable Furnace Repair Across Marietta
Most furnace repairs in Marietta run $150 – $700 and can be completed in a single visit, with our Furnace Repair team dispatching from the Atlanta office to reach Marietta homes the same day you call. If your heat’s out tonight, a live person answers our phones 24 hours a day, and we’ll send you a photo and name of the exact technician who’s coming to your door.
We know Marietta’s heating problems aren’t like Atlanta’s or Kennesaw’s. The brick-front ranches and two-story colonials built during Cobb County’s 1983 – 1998 suburban explosion, especially in East Cobb neighborhoods like Shallowford Falls and along the Murdock Road corridor, were fitted with builder-grade heat pump systems that were never load-calculated. The “furnace” in these homes is usually an air handler with electric strip backup, not a gas furnace, and it’s been compensating for mismatched equipment and bypassed zone dampers since the day the house was built. That’s why a no-heat call in Marietta often starts with a ductwork and zoning diagnostic, not a simple part swap.
Call (984) 538-9003 any time. A real person picks up.
Why Brandt HVAC Is Marietta’s Preferred Furnace Repair Company
We’re part of the Threshold Group family, established in 2003, and each Brandt HVAC location is independently owned and operated. Our Marietta customers know exactly who walks through their door because every technician is background-checked and identity-verified under our Threshold Verified standard. You get a name, photo, and badge before arrival, and if anyone shows up who you weren’t told to expect, that visit is on us.
Our 365-Day Done Right Promise means every repair includes a written guarantee. If it fails, we return at no charge. No argument. Every job also starts with a written price before any work begins, so you’re never watching a meter run.
Dispatch and scheduling are coordinated from our Atlanta office, but our crews serve Marietta locally and understand the specific failure modes of Cobb County’s all-electric heat pump legacy. We’ve traced enough no-heat calls to bypassed zone dampers and mismatched tonnage to know that a quick fix often hides a deeper problem.
Emergency Furnace Repair in Marietta
Emergency Furnace Repair in Marietta means your heat is out when you need it, and for homes with heat pump-only systems, that risk spikes during Cobb County’s periodic ice storms. When power returns after an ice event, we see a surge of calls from East Cobb and the Murdock Road corridor where the reversing valve or defrost board failed under ice load, leaving only electric strip heat, or nothing at all. Most emergency repairs fall in our $150 – $700 range, and we carry capacitors, ignitors, blower motors, and gas valves on our trucks to complete the job in one trip when possible.
Because Marietta sits at 1,000 – 1,100 feet in the Georgia Piedmont, winter temperatures can drop fast enough to push heat pumps into aux heat mode for days at a stretch. That’s when pre-existing problems, like a blower motor running at half capacity due to a bad capacitor, turn into full no-heat emergencies.
What Counts as an Emergency
No heat at all. A furnace or heat pump blowing cold air. Strange electrical smells or burning odors from the air handler. Loud grinding or screeching from the blower compartment. Any of these in a Marietta home with young children, older residents, or anyone with respiratory conditions needs immediate attention.
How We Handle Night and Weekend Calls
A live person answers our phones 24/7. No voicemail, no callback queue, no automated phone trees. The technician we send is the technician you were told to expect, with the same written upfront pricing and written guarantee that applies to every Brandt HVAC job.
Furnace Maintenance in Marietta
Furnace Maintenance in Marietta is the best defense against waking up to a cold house, especially in neighborhoods where original flex ductwork has been degrading in 140°F attic cavities for thirty-plus years. Our tune-up runs $80 – $200 and includes a full written report of what we found, not a sales pitch. Technicians are not paid on what they sell, so the report says what needs attention, what can wait, and what’s running fine.
In East Cobb’s 1983 – 1998 subdivisions, we pay special attention to zone damper operation, static pressure across the coil, and whether the aux heat is cycling on prematurely because the heat pump can’t keep up with a capacity mismatch that was baked in at installation. Catching these issues in October beats discovering them during a January ice event.
What Our Tune-Up Covers
We test all safety controls, measure temperature rise, check blower amp draw, inspect the heat exchanger or strip heat elements, verify thermostat calibration, and test zone damper operation if your system has them. For heat pumps, we check refrigerant charge and defrost cycle timing, critical for Marietta’s humidity load.
When to Schedule
Early fall, before the first cold snap. But if you’ve just bought a home in Shallowford Falls, East Cobb, or near Marietta Square and have no service history, schedule now. Builder-grade systems with unknown maintenance histories fail predictably, and predictably at the worst time.
Trusted Brands We Service in Marietta
We service all major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Marietta homeowners, that means we stock common parts for Trane, Lennox, Goodman, and Rheem systems locally, so a failed ignitor or blower motor doesn’t turn into a multi-day wait. Many of the heat pumps we see in Cobb County’s 1990s subdivisions are Goodman or Rheem builder-grade units that have outlived their design life by a decade. We can keep them running, but we’ll also tell you honestly when the repair math stops working and replacement makes more sense.
Common Furnace Repair Problems We See in Marietta Homes
- Mismatched tonnage hiding behind a no-heat call. In East Cobb subdivisions built during the 1983 – 1998 boom, it’s common to find a 3-ton air handler paired with a 2.5-ton condenser from original installation. The aux heat runs constantly trying to cover the gap, and the homeowner thinks they have a “furnace” problem when it’s really a capacity problem born from a builder cutting corners.
- Bypassed zone dampers sending heat to the wrong floor. Two-story colonials in the Walton and Lassiter High School zones often had zone systems commissioned poorly during construction. Dampers get stuck open or are manually bypassed, creating static pressure that eventually burns out the blower motor. We fix the motor and the zoning.
- Reversing valve and defrost board failures during ice events. Cobb County’s periodic ice storms stress heat pump refrigerant circuits. When the reversing valve fails, the system can’t switch to heating mode. When the defrost board fails, the coil ices over. Both leave electric strip heat as the only heat source, or no heat at all.
- Failed blower capacitors in attic-mounted air handlers. Marietta’s summer attic temperatures routinely exceed 140°F, cooking capacitors and degrading flex duct. A weak capacitor lets the blower run slow or not at all, which means no air movement across the strip heat elements and a cold house even though the “furnace” is technically calling for heat.
Pricing for Furnace Repair in Marietta, GA
Here’s what furnace repair costs in Marietta, with parts and labor included:
| Service | Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Tune-Up | $80 – $200 |
Most ignitor replacements run $150 – $300. Blower motor repairs or replacements typically fall in the $300 – $600 range. Gas valve work and heat exchanger issues can push toward the upper end of our $150 – $700 range. What drives cost up isn’t the part itself, it’s how long the tech spends diagnosing whether the real problem is the part, the ductwork, or a 30-year-old installation error.
Every job starts with a written price before any work begins. No exceptions. Estimates are free. Call (984) 538-9003 to schedule.
We Also Serve Cities Near Marietta
Our Furnace Repair in Marietta crews also respond to heating calls in Smyrna, Kennesaw, Powder Springs, and Atlanta. The same Threshold Verified standard, same written upfront pricing, same 365-Day Done Right Promise applies in every community we serve.
Serving Marietta, GA - Our Local Coverage Area
We’re based in the Marietta area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Furnace Repair in Marietta
Your aux heat is compensating for a capacity problem that was likely baked in when the house was built. In the 1983 – 1998 East Cobb build-out, many systems were sized by rule of thumb rather than load calculation, so a 3-ton air handler might be paired with a 2.5-ton condenser, or zone dampers were bypassed during construction. The heat pump can’t move enough heat, so the aux strips cycle on to cover the gap. We check tonnage match, static pressure, and zone operation before quoting any part replacement. Call (984) 538-9003 for a diagnostic – estimates are free.
Marietta’s Piedmont location delivers brutally humid summers with dewpoints in the low 70s°F, and heat pumps that are poorly charged or undersized can’t remove enough latent moisture even when the thermostat reads 72°F. In winter, a blower running constantly with weak heat output often points to a failed capacitor or a system stuck in aux heat mode because the reversing valve won’t shift. The humidity complaint and the constant-running complaint usually share a root cause. We measure actual system capacity against your home’s load to find it.
Yes. We repair gas furnaces, electric air handlers with strip heat, and heat pump systems. Because Cobb EMC historically pushed all-electric heat pumps during the county’s suburban expansion, most “furnace” calls we get in Marietta are actually heat pump aux heat problems. Our technicians are trained on both combustion systems and refrigerant circuits, so we don’t misdiagnose a refrigerant charge issue as an electrical problem or vice versa.
Manufacturer parts warranties typically cover the component for 5 – 10 years if the original homeowner registered the system, but they don’t cover labor to diagnose and replace the failed part. Many builder-grade systems from the 1990s were never registered, so the warranty reverts to a shorter baseline period. Our tech pulls the serial number and checks registration status before quoting. Our 365-Day Done Right Promise covers our workmanship separately: if our repair fails within a year, we return at no charge.
We answer phones live 24/7 and dispatch same-day when conditions allow, but ice storms create two realities: road safety limits our response speed, and power outages mean we can’t restore heat until electricity returns. If your home has power and our tech can reach you safely, we’ll diagnose and repair the same day. If the problem is a failed heat pump with no gas backup, we’ll also discuss temporary heating options while we source any needed parts. Call (984) 538-9003 – we’ll give you an honest arrival estimate based on current conditions.
Written by Devin Marlowe, Owner at Brandt HVAC, serving Marietta and surrounding communities.