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Get your free estimateLennox HVAC in Woodstock, GA | Cold Harbour Heating and Air Marietta
We provide independent Lennox repair, maintenance, and replacement across Woodstock, GA, including our AC Repair in Woodstock. The difference here is that we know the Lennox units sitting in Woodstock’s 1990s subdivisions well enough to diagnose by symptom and serial number, not by guesswork. Victor Mancini and our crew have worked on more G26 furnaces and 13ACX condensers than we can count, and we bring that depth to every call. Call (762) 240-5599 for a free estimate.
We’re not a manufacturer-authorized shop, and that’s intentional. Being independent means when your Lennox needs a $200 capacitor, we say so. When it needs a full system swap, we say that too. No sales quota pushing you toward equipment you don’t need. Our Lennox sales & service work is built around what your home actually requires, backed by the 365-Day Done Right Promise in writing on every repair.
Why Woodstock Residents Choose Us for Lennox Service
Most of our Woodstock calls come from neighbors referring neighbors. Victor grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College before spending the better part of two decades doing HVAC work across the Southeast. He has served Marietta for years, from quick tune-ups in East Cobb to full system replacements near Kennesaw Mountain. The Woodstock work grew the same way: someone’s furnace died in Towne Lake, we fixed it with our Furnace Repair in Woodstock, and the next week we got calls from three houses on the same street.
Our technicians train on nine residential brands, but Lennox holds a particular place. The G26 and G51 furnaces that builders dropped into Woodstock homes in the 1990s and 2000s are units we see weekly. We know the control boards, the ignitors, the inducer motors, and the exact failure patterns. When we show up, the diagnostic time is shorter because we have seen your exact unit fail before. We serve the full Woodstock service area and surrounding Cherokee County neighborhoods.
Every technician is background-checked and uniformed. The written price comes before any tool leaves the truck. And if the repair fails within 365 days, we come back and correct it at no charge. That guarantee is on paper, not verbal.
Styles & brands we work with
Common Lennox HVAC Problems We Solve in Woodstock
- G26 and G51 control board and inducer failures: In Towne Lake and Eagle Watch, original Lennox G26 and G51 furnaces are at end-of-life. The control boards and inducer motors typically give out around year 18 to 22. When one neighbor’s board fries, we regularly get three more calls that same week from the same subdivision.
- SureLight ignitor cracks on G51 and EL296 furnaces: Woodstock attics get hot. That heat cycling puts hairline cracks in Lennox SureLight ignitors, causing intermittent lockouts. Other shops misdiagnose this as a gas valve failure. We check the ignitor first because we have seen it hundreds of times.
- iComfort humidity-sensor drift on Signature systems: Woodstock summers are muggy. On Lennox XC25 and XP25 systems, the proprietary communicating thermostat and iComfort board are prone to humidity-sensor drift. A miscalibrated sensor makes the unit short-cycle and leaves your upstairs sticky. We recalibrate or replace the sensor without swapping the whole board.
- Pinhole leaks in builder-grade evaporator coils: The 13ACX and 14ACX Lennox ACs installed in Woodstock homes develop pinhole leaks at the tube sheet welds after 8 to 12 years of humidity exposure. We often pair a coil swap with a UV purifier to slow the recurrence.
- Furnace tune-ups and heat exchanger inspections: Lennox high-efficiency secondary heat exchangers clog faster in Woodstock than in nearby Canton because of the fine reddish clay dust from Cherokee County soil. We include a heat exchanger inspection on every tune-up and cut a filter rack access panel if you don’t already have one.
Lennox Service in Woodstock: What Local Conditions Mean for Your Equipment
Homes in Woodstock’s Town Lake and Wyngate subdivisions sit on former Cherokee County farmland. The soil is reddish, acidic clay that kicks up fine dust through crawl spaces and return-air leaks. That dust settles directly into Lennox high-efficiency secondary heat exchangers, clogging them faster than in nearby Canton where the soil is a looser loam. We see furnaces in Town Lake with heat exchangers 30 percent more clogged than identical units across the county line. The fix is simple and preventative: on every Lennox furnace tune-up in Woodstock, we cut a filter rack access panel unless the homeowner already installed one. It costs a little upfront and saves a world of trouble later.
Last spring in Towne Lake, our tech pulled a Lennox G26Q furnace from 1998 with a dead SureLight ignitor and a rusted collector box. The bigger surprise was the original 13ACX condenser outside, its capacitor swollen to twice its normal size from years of attic and outdoor heat. We replaced the ignitor and capacitor on the spot, showed the homeowner the rust pinhole forming on the secondary heat exchanger, and quoted a heat exchanger repair against a new EL296V. They chose the upgrade for the 10-year parts warranty. That’s the kind of call we make in Woodstock weekly.
Lennox Models & Products We Service in Woodstock
We service the full Lennox residential lineup. The builder-grade G26 and G26Q gas furnaces from the 1990s. The mid-2000s G51 and G51MP high-efficiency furnaces. The modern Elite Series, including SLP98V and EL296V modulating and two-stage furnaces. And the Signature Series XC25 and XP25 variable-capacity ACs and heat pumps.
On parts, we take a stance that serves your budget and your equipment. For communicating systems, we install OEM Lennox parts: iComfort boards, variable-speed motors, modulating gas valves. Aftermarket substitutes cause ghost faults. For non-communicating mechanicals like capacitors, contactors, and pressure switches, we use quality OEM-spec equivalents that keep costs 15 to 25 percent lower. We’ll tell you flat-out when a 20-year-old G26 needs a $1,200 heat exchanger that belongs in a replacement budget instead.
See the difference
Before
After
Before
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Before
AfterLennox Service Pricing in Woodstock
Here’s what Lennox service in Woodstock typically costs:
| Service | Typical Price Range |
|---|---|
| Lennox Furnace Tune-Up | $80 – $200 |
| Lennox AC Repair (capacitor, ignitor, board) | $150 – $650 |
| Lennox AC Installation (13ACX/14ACX replacement) | $3500 – $7500 |
The range depends on your specific unit, the part, and how long the diagnostic takes. A capacitor replacement is quick. A control board replacement takes more care. Every estimate is free, and the written price comes before any work begins. Call (762) 240-5599 and we’ll give you an exact number for your Lennox system.
Serving Woodstock, GA - Our Local Coverage Area
We’re based in the Woodstock 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 Woodstock
The builders installed them around the same time, typically 1998 to 2004. The original control boards and inducer motors have a design life of about 18 to 22 years. When one neighbor’s board fries, the others are usually days or weeks behind. If your G26 is still original, a tune-up now will tell you how much life it has left. Call (762) 240-5599 to schedule.
Yes. In most cases the iComfort thermostat or the iComfort board can be recalibrated or replaced as a standalone part. The humidity-sensor drift we see in Woodstock is a calibration issue more often than a board failure. We diagnose it by symptom and serial number, and we only replace what’s actually broken.
It depends on the age and whether the warranty was registered and transferred. Lennox offers a limited 20-year heat exchanger warranty on many models, but it doesn’t always transfer to a second owner. We can check your serial number and tell you exactly what coverage remains. The diagnostic is part of every tune-up we do in Woodstock.
In many Woodstock homes, yes. The humid summers mean your AC runs a double shift: cooling and dehumidifying. A dedicated whole-home dehumidifier lets the AC do its job without overcooling the house to strip moisture. We install dehumidifiers alongside new Lennox systems regularly, especially in the larger two-story homes around Towne Lake and Wyngate. Call (762) 240-5599 for a recommendation specific to your square footage.
The G26 is a single-stage, builder-grade furnace from the 1990s. It runs at one speed and one flame setting. The EL296V is a two-stage, variable-speed high-efficiency furnace that modulates heat output to match what your home actually needs. For a 2,800 sq ft Woodstock house with hot, humid summers and mild winters, the EL296V gives you better comfort, lower gas bills, and a 10-year parts warranty. The cost difference depends on your ductwork, but we’ll quote both options in writing before you decide.
Service Areas Near Woodstock
Beyond Woodstock, we serve Lennox service in Marietta, Lennox service in Roswell, Holly Springs, and Dallas. If you’re in one of those areas and need a Lennox technician who shows up on time with the price in hand, call us.
Book Your Lennox Service in Woodstock Today
Tell me what the system is doing, and I will tell you exactly what it needs. No guesswork, no runaround. Call (762) 240-5599 for a free estimate on Lennox repair, tune-up, or replacement in Woodstock. A live person answers 24/7, and we’ll have a technician out on a schedule that works for you.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving Woodstock since 2003.