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 Furnace Repair in Atlanta: What to Know First
We repair Lennox furnaces throughout Atlanta, and most jobs are finished in a single visit. Honest numbers first: expect to pay $150 – $700 depending on the part, and you’ll see a written price before a single tool comes out. That’s not a policy we apply case by case. It’s the Kingswell Way, and it’s been how we work since 2003.
If you’re reading this because your Lennox furnace stopped heating a house on the north side or down near East Point, call (478) 223-8776 and a live person picks up. Always. This page is for Lennox owners in Atlanta who want to know what actually breaks on these furnaces, what it costs, and whether it’s worth fixing before winter sets in.
How Lennox Products Fail – and How We Fix Them
Lennox builds a solid furnace, and certain lines show up all over Atlanta. The G50 and G60 series ran for years in older homes, the G51MP was common in mid-2000s builds, and the current SLP99V and EL296V models are in a lot of the newer construction around the metro. Here’s what we actually see on service calls:
- Ignitor failure on G50 and G60 series: The silicon nitride ignitor on these older units gets brittle and cracks, usually five to ten years in. Symptom: the furnace starts, the blower kicks on, but the burner never lights and you get cold air through the vents. We replace it with an OEM Lennox ignitor or a quality aftermarket match, and most jobs run $150 – $280 parts and labor included.
- Pressure switch lockouts on G51MP: The draft inducer runs but the switch never closes, so the board kills the sequence and the furnace just sits there. In Atlanta, we see this more in homes with clogged condensate drains or partially blocked venting, especially after a heavy pollen season. We test the switch with a manometer rather than guessing, because replacing a good switch doesn’t fix a restricted flue.
- Surging limit trips on SLP99V and EL296V: These high-efficiency modulating units use a variable-speed blower and a tight heat exchanger. When the filter is neglected or return air is choked, the limit switch trips mid-cycle and the furnace short-cycles. Symptom: warm air for a few minutes, then cold, then warm again. We measure static pressure, find the actual airflow problem, and correct it rather than just resetting the limit.
- Gas valve hiccups on ML195 and EL195 series: The single-stage gas valves on these entry-level units can get sticky as they age, especially in Atlanta’s humid summers when the furnace sits idle for months and then fires for the first time in November. We clean and test the valve, verify inlet and outlet pressure with a manometer, and only recommend replacement when the valve fails the test. No parts changed on a guess.
- Heat exchanger cracks on 80% units over 20 years old: On G20, G23, and early G50 furnaces, the tubular heat exchanger eventually fatigues. Symptom: flame rollout, sooty buildup, or a faint smell of exhaust when the burner runs. This is a safety item, not a convenience one. A cracked heat exchanger means the furnace gets shut down, and we walk you through repair versus replace with the real numbers for both.
Styles & brands we work with
Our Lennox Furnace Repair Process
- 1
You call, a person answers: We take the details, schedule a firm arrival window, and you know who’s coming before the van pulls up.
- 2
We show up and listen: Victor Mancini has said it at doors for years: “Tell me what it’s doing, and I’ll tell you what it needs – no guesswork, no extras.” So that’s step one. You describe the symptom, we take it from there.
- 3
Diagnostics before repairs: Background-checked, uniformed techs run the system through its full sequence of operation, test each component, and find the actual reason it stopped heating. We don’t change parts on hunches.
- 4
Parts decision, explained plainly: Where OEM Lennox parts make sense for warranty or fitment, we use them. Where a quality aftermarket part gets the job done for less and holds up just as long, we tell you the difference and let you choose. Written price first, either way.
- 5
The fix and the test: We make the repair, cycle the furnace several times, verify temperature rise, gas pressure, and safety switch operation, and confirm it heats the way it should before we leave.
- 6
Cleanup and the written guarantee: We leave the mechanical room cleaner than we found it, and you get the 365-Day Done Right Promise on paper before we go. If the repair fails inside a year, we come back and correct it at no charge. No verbal handshakes. Written down.
See the difference
Before
After
Before
After
Before
AfterWhat Lennox Furnace Repair Costs in Atlanta
Most Lennox furnace repairs in Atlanta land between $150 and $700, parts and labor included. Here’s the honest breakdown by job type:
- Ignitor replacement: $150 – $280
- Flame sensor cleaning or replacement: $120 – $220
- Gas valve repair or replacement: $280 – $550
- Pressure switch replacement: $160 – $320
- Blower motor replacement: $350 – $700
- Heat exchanger repair: $450 – $700 (quoted only after inspection, and we’ll be straight with you if replacement makes more sense)
What moves the price: the part itself, whether OEM or aftermarket, and how long the labor takes on your specific model. Older G50 and G60 units are usually quick jobs. Modulating SLP99V systems take more time because there’s more to verify. Every job gets a written price before work begins, and the estimate is free. Call (478) 223-8776 and we’ll give you the real number for your unit.
Why Atlanta Homeowners Call Cold Harbour Heating and Air Atlanta for Lennox Work
Plenty of companies in Atlanta can change a part. Fewer can tell you why that part failed, whether it’ll fail again, and what it’ll cost before they start turning wrenches. We’ve been doing independently owned and operated HVAC work since 2003 as part of the Kingswell network, and our techs are trained on nine major residential brands: Lennox included, and also Carrier, Trane, Goodman, Rheem, York, Daikin, Bryant, and American Standard. That matters if you’ve got a mixed-brand house or a second system in the attic.
A live person answers our phone 24 hours a day, 7 days a week. When your furnace quits on a January night in Buckhead or Decatur, you talk to a human, not a voicemail tree. And every repair carries the 365-Day Done Right Promise: if it fails within a year, we come back and fix it at no charge. That promise is on paper before we leave your house. The name story fits: a cold harbour was a roadside shelter where travelers waited out the weather. We’ve made our living keeping Atlanta homes warm through the worst of it.
FAQs
We service Lennox furnaces regardless of warranty status, and we’ll help you understand what your Lennox warranty covers before any repair begins. We’re an independent Lennox service provider, not factory-authorized, so we’re not bound to Lennox dealership pricing or parts pipelines. That means we can often source parts faster than a dealer network, especially during the first cold snap of the season. Call (478) 223-8776 and tell us your model and serial number. We’ll walk you through what’s covered before scheduling anything.
Most repair calls get a same-day or next-day appointment with a firm arrival window, not a four-hour “sometime.” We cover the whole metro: Grant Park, Virginia-Highland, Sandy Springs, Decatur, East Point, Roswell, and points beyond. When your furnace is down and the temperature is dropping, call and we’ll get you on the schedule that day. A live person answers around the clock, every day.
If your Lennox furnace is under 12 years old and the repair is under $700, repair usually makes sense, especially on G51MP, EL296V, or SLP99V units that still have life in the heat exchanger. If it’s a 20-plus-year-old G20 or early G50 with a cracked heat exchanger, replacement often costs less over five years than nursing the old unit along. We’ll show you the numbers for both options and let you decide. We don’t push replacements on furnaces that just need a $200 ignitor. That’s not how Victor runs his shop, and it’s not how we train our techs.
For many components, yes. Ignitors, flame sensors, pressure switches, and blower motors have solid aftermarket options that perform as well as Lennox-branded parts at a lower price. For proprietary parts, like certain modulating gas valves on the SLP99V or control boards on newer EL296V units, we stick with OEM to keep things running correctly. We’ll tell you which is which, explain the price difference, and the written price you get before work starts reflects the actual part we’re installing. No surprises at the door.
Yes. Over half of our Lennox repair calls in Atlanta are on furnaces we didn’t install. It doesn’t matter who put it in or when. We diagnose the system as it sits, fix what’s actually wrong, and back the work with the 365-Day Done Right Promise. If the repair fails within a year, we return and correct it at no additional charge. That guarantee applies on every job, whether we sold the furnace or just showed up to fix it. Call (478) 223-8776 and we’ll get you scheduled.
Written by Victor Mancini, Owner & Lead Technician, Cold Harbour Heating and Air Atlanta at Cold Harbour Heating and Air Atlanta, serving Atlanta and nearby areas.