Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal 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.
Get your free estimateLennox HVAC in Marietta, GA | Halden Heating and Air Marietta
We’re Halden Heating and Air Marietta, and we offer our AC Repair in Marietta for every Lennox residential line across Cobb County: Dave Lennox Signature Collection, Elite Series, Merit Series, and the healthy climate line. The short version: if your Lennox system lives in Marietta, it’s fighting two things most Lennox units in other cities never see: red-clay foundation movement and months of humid subtropical air. You’ll find our trucks near Marietta Square most weeks, handling exactly that.
Lennox sales & service is what we do every day. Andre Fuller leads our crew, and he’s been turning wrenches on Lennox equipment since he finished his HVAC training at Los Angeles Trade-Technical College and spent the next twenty years working rooftop units and crawlspace air handlers alike. We’re an independent Lennox service provider, which means we answer only to you, not to a factory rep. Call (229) 514-0545 for a free estimate with a written price before any work starts.
Why Marietta Residents Choose Us for Lennox Service
Because Lennox makes some genuinely specific equipment, and a generic AC tech who mostly sees Goodman or Carrier will chase his tail on an iComfort WiFi thermostat or a modulating gas valve. We see Lennox daily. Every technician who rolls up to a Marietta home carries the diagnostic experience to tell the difference between an XC25 inverter board hiccup and a simple capacitor failure before touching a panel.
Andre grew up in Los Angeles, but he’s spent years in Marietta now, working both the pre-war bungalows near the Square and the 1970s-90s brick ranches in east Cobb. He learned one rule early and built Halden Heating and Air on it: put the price in writing before anyone opens a panel. Straight answer, written price, done right. That’s how every Lennox job here goes.
The Marietta service area we cover spans the full loop: historic downtown, East Cobb, West Cobb, and the subdivisions stacked along Roswell Road and Powder Springs Street. Book online, get a live arrival time, and track your tech to the door. No four-hour windows, no phone tag. Written price first, every time.
Styles & brands we work with
Common Lennox HVAC Problems We Solve in Marietta
- Pinhole evaporator coil leaks on XC25 and XC21 condensers. Marietta’s April-through-October AC season and steamy summer air corrode the thin-gauge aluminum fins Lennox uses on these high-efficiency units. By year 8 to 10, we routinely find pinhole refrigerant leaks on coils that test fine in March but lose cooling by July.
- Cracked rigid ductboard in slab-on-grade ranches. East Marietta’s red clay expands and contracts with every wet spring and dry summer, shifting foundations enough to crack the rigid ductboard that carries air through slab homes. Rooms farthest from the air handler lose airflow first. We see this on Lennox variable-speed air handlers more than any other brand because those systems push more static pressure through the ducts.
- Error code 292 on SLP98 and EL296V modulating furnaces. Lennox’s modulating gas valves rely on precise airflow readings. When returns are undersized in a Marietta tract home, attic dust collects on the valve body and pressure switches, and the gas valve gums up. The system locks out and flashes 292. It’s almost always cleanable, not a board replacement.
- iComfort thermostat WiFi drops in plaster-and-lath homes. Older Marietta bungalows near the Square have plaster walls with metal lath that blocks 2.4GHz signals. The Lennox iComfort thermostat sits 20 feet from the router and keeps losing connection. We fix it by repositioning the thermostat or adding a mesh node, not by replacing the unit.
- Capacity loss on XC16 two-stage condensers from duct leakage. When crawlspace duct joints pull loose from clay settlement, the XC16’s two-stage compressor never reaches second stage. The system runs constantly and still doesn’t cool. Duct repair fixes the actual problem; a new system wouldn’t.
Lennox Service in Marietta: What Local Conditions Mean for Your Equipment
The red clay under east Marietta’s slab-on-grade ranches shifts enough each spring that we see Lennox ductboard cracks reappear within 3 to 5 years of repair. That’s not a guess; it’s what our service records show across neighborhoods like East Cobb estates and the ranch subdivisions running off Roswell Road toward East Cobb Park. Unlike Douglasville or Kennesaw, where slab movement is far less aggressive, Marietta’s particular soil composition means a duct joint we reseal today may pull apart again after a few wet-dry cycles. For Lennox owners, that translates to a variable-speed air handler working overtime against duct leaks you can’t see, tripping limit switches and costing real money in electricity. This is the one thing we tell every Lennox homeowner in Marietta to watch for, and it’s why our repairs on slab homes include a hard look at the duct runs, not just the unit itself.
One call that stuck with us: our tech Evan pulled up to a brick ranch off Roswell Road near East Cobb Park. The homeowner said one upstairs bedroom never cooled. Evan found the rigid ductboard trunk in the crawlspace had pulled apart at a joint from clay settlement, dumping conditioned air into the dirt. He rebuilt the joint with mastic and stainless clamps, recharged the Lennox XC16 two-stage condenser to 10 degrees subcool, and airflow to the bedroom returned to 400 CFM. That’s Marietta Lennox work in a nutshell: the unit was fine. The ground underneath it wasn’t.
Lennox Models & Products We Service in Marietta
We work on every residential Lennox line sold in the last 25 years: the Dave Lennox Signature Collection (XC25, XC21, XP25, SLP98), the Elite Series (EL296V, XC16, EL18), the Merit Series (ML14, ML180), and Lennox healthy climate accessories including PureAir air purification and Humiditrol whole-home dehumidification. For new systems, we also handle AC Installation - Marietta. The newer variable-speed and modulating systems we stock OEM parts for, because boards and gas valves carry factory warranties. But for out-of-warranty units and common wear parts like capacitors, contactors, and pressure switches, we install US-made aftermarket parts that hold up longer in Georgia heat.
That parts strategy matters in Marietta. The same capacitor failing on a Lennox XC21 in August will fail again in two years if we bolt in an identical OEM part that couldn’t take the heat in the first place. We carry what gets Lennox systems back online same day, and we know which parts to upgrade.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Marietta
| Service | Typical Price Range |
|---|---|
| AC Repair (diagnostic + common part) | $150 – $650 |
| Furnace Repair (ignitor, gas valve, board) | $150 – $700 |
| AC Installation (full system, no ductwork) | $3500 – $7500 |
| Furnace/AC Tune-Up | $80 – $200 |
What actually drives your Lennox repair cost in Marietta is whether the failure is a $20 capacitor or a $400 OEM inverter board. We diagnose for a flat fee, then you get a written price with the specific part and labor before we do any work. No door-step price changes, ever. A free estimate is available, and if a repair fails within the covered window, we come back at no charge. That’s automatic, not something you have to ask for. Call (229) 514-0545 for the exact price on your Lennox system.
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 – Lennox HVAC in Marietta
Your XC21’s thin-gauge evaporator coil is most likely losing refrigerant through pinhole corrosion that only shows up under peak August load. In spring, cooler temperatures mean lower system pressure and the leak is too small to detect. By August, Marietta’s heat and humidity push the system to full load, the coil expands, and the refrigerant escapes faster. You need a leak search under hot-weather conditions, not a springtime guess. Call (229) 514-0545 and we’ll find it.
Yes, in most Marietta homes we can. Error 292 on a Lennox SLP98 or EL296V is usually a gummed-up modulating gas valve or dirty pressure switch from attic dust getting pulled in through undersized returns, not a board failure. We clean the valve body and pressure tube, verify gas pressures, and clear the code. A board replacement is the last resort, not the first move.
Yes, that’s normal for Marietta. East Cobb’s tree canopy and the spring pollen season load up the MERV 16 PureAir filter faster than Lennox’s 6 to 12 month estimate. The humid air also encourages faster particle accumulation. Plan on replacing PureAir filters every 4 to 6 months in Marietta, more often if you’re near woods or have pets.
Yes. R-410A is R-410A. We recharge Lennox R-410A systems with the same refrigerant grade the factory ships, matched to the manufacturer’s subcooling target. For older Lennox systems still using R-22, we’ll talk through the phase-out and tell you honestly when replacement makes more sense than repeated recharges.
That’s usually a refrigerant level issue or restricted airflow from the duct problems we mentioned earlier. In a Marietta crawlspace, loose duct joints from clay settlement reduce airflow across the coil, and the coil temperature drops below freezing even in mild weather. We check charge and airflow together. Call (229) 514-0545 for a proper diagnosis.
Service Areas Near Marietta
We handle Lennox service throughout Marietta, including East Cobb, West Cobb, and homes near the Square. Lennox service in Douglasville and Lennox service in Decatur are also available, plus Powder Springs, Vinings, and Fair Oaks. If your Lennox system is anywhere in Cobb County, call and we’ll be there.
Book Your Lennox Service in Marietta Today
Your Lennox system needs someone who understands what Marietta’s climate and soil do to this equipment specifically. We do. Call (229) 514-0545 now for a free estimate, a written price, and a live arrival time you can track to the door. Same-day repair is available when your Lennox system goes down.
Written by Andre Fuller, Owner at Halden Heating and Air Marietta, serving Marietta and Cobb County since 2004.