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Get your free estimateLennox Furnace Repair in Alpharetta: What to Know First
Lennox furnace repair in Alpharetta typically costs between $150 and $700, and most jobs are completed the same day or within 24 hours. As an independent Lennox service provider, we work on all major Lennox furnace lines, including the Merit, Elite, and Dave Lennox Signature Series. We carry common Lennox ignitors, flame sensors, and pressure switches on our trucks, so we’re often able to diagnose and fix the problem in one visit. If you’re dealing with a cold house or a furnace that’s short-cycling, call (478) 606-5046 and a live person will answer, day or night.
This page is for Alpharetta homeowners who own a Lennox furnace and want straight answers about what’s wrong, what it’ll cost, and how fast we can get heat back on. We’ll walk through how Lennox furnaces fail in ways other brands don’t, what a repair looks like from start to finish, and why the way we leave your house matters as much as the fix itself.
How Lennox Products Fail – and How We Fix Them
Lennox builds quiet, efficient furnaces, but after 15 years of working on them in Alpharetta, we know exactly where they tend to wear down. Below are the failure patterns we see most often, and what we do about each one.
- Ignitor failure on the Merit Series (ML180, ML193): The silicon nitride ignitors on entry-level Merit furnaces are durable, but they can crack after years of heat cycling. The symptom is usually a furnace that runs the draft inducer, then shuts down without ever lighting. We keep OEM and quality aftermarket ignitors on the truck, so this is typically a one-visit fix.
- Pressure switch faults on the Elite Series (EL296V, EL280): Alpharetta’s humid springs and pollen-heavy falls put extra strain on pressure switches. A furnace that fires intermittently or locks out after three attempts often has a pressure switch misreading due to a partially blocked condensate drain or a pinhole in the hose. We test the switch with a manometer rather than throwing parts at it, because a misdiagnosis here just means you’re paying twice for the same problem.
- Heat exchanger concerns on higher-efficiency models (SLP98V, EL296V): Lennox’s variable-speed, condensing furnaces run cool and efficient, but any furnace that sees years of Georgia humidity can develop micro-fractures in the secondary heat exchanger. We inspect with a camera every time, and we’re honest about when a heat exchanger replacement makes sense versus when a new furnace is the better financial call.
- Blower motor issues on the Dave Lennox Signature Series (SL280V, EL296V): Variable-speed ECM blower motors are smooth and quiet when they’re healthy, but they’re sensitive to dirty filters and static pressure problems. If your Lennox is making a humming sound or the airflow feels weak, we measure the static pressure first before condemning the motor. Sometimes a duct restriction is the real villain, and fixing that saves you a $600 motor replacement.
- Gas valve and flame sensor trouble across all lines: A flame sensor that needs cleaning is the single most common winter call we run in Alpharetta. The furnace lights, then shuts down after 30 seconds. We clean the sensor, check the gas valve for proper voltage and pressure, and verify the burners are clean. This job usually runs under $200 and takes about an hour.
Styles & brands we work with
Our Lennox Furnace Repair Process
When you call about a Lennox furnace that’s not heating, here’s what happens from the moment you dial to the moment we walk out your door.
- 1
You call (478) 606-5046. A live person answers, asks what your furnace is doing, and schedules a window that works for you. No voicemail trees, no callbacks.
- 2
We arrive and protect the house first. Shoe covers go on before we step inside, drop cloths go down under the furnace and along the path to it. If you have kids or pets, we’ll keep tools and small parts off the floor.
- 3
We diagnose with the meter running through every test. We check the thermostat signal, the inducer, the pressure switch, the ignitor, and the flame sensor. We’ll measure gas pressure at the valve with a manometer, because a furnace that lights won’t stay lit if the pressure’s off.
- 4
You get a written price before we touch a single part. We’ll tell you what’s wrong, what we recommend, and what it costs. If there’s an OEM versus aftermarket parts decision, we’ll explain the difference in plain English and let you choose.
- 5
We make the repair, then test the full sequence. We don’t just replace a part and leave. We run the furnace through 3 to 5 full heating cycles, check the temperature rise, and measure the flue gases to make sure the burn is clean.
- 6
We clean up and show you. Before we leave, we take a photo of the cleaned area and text it to you. Every job is backed by our 365-Day Done Right Promise: if it’s not done right, we make it right. No runarounds, no fine print.
See the difference
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AfterWhat Lennox Furnace Repair Costs in Alpharetta
Repair pricing on a Lennox furnace in Alpharetta runs between $150 and $700, depending on what failed and which model you have. The common low-end jobs are flame sensor cleanings and pressure switch hose replacements, which usually fall under $200. Ignitor replacements and gas valve work typically run $250 to $450. A blower motor replacement on a variable-speed Lennox can land in the $500 to $700 range, and heat exchanger replacement is the one job where we’ll sit down with you and talk honestly about repair versus replacement, because the labor cost on a heat exchanger often tips the math toward a new unit.
What moves the price is parts availability and model complexity. A Merit Series furnace is straightforward to work on. A modulating Signature Series model with a communicating control board requires more diagnostic time and more expensive parts. Either way, you get a written price before any work starts. Call (478) 606-5046 for a free estimate, and we’ll tell you what we think it’ll cost before we even come out.
Why Alpharetta Homeowners Call Meadowsweet Heating and Air Alpharetta for Lennox Work
We know Lennox furnaces the way you know your own car: by the sounds they make and the quirks they have. But the real reason Alpharetta families stick with us is the Cedarwell Care Promise, which is built into every single visit. A written price before any work starts. Background-checked, uniformed technicians who follow our C.A.R.E. values code: Clean up like it’s their own home, Ask before moving anything, Respect your family’s time and quiet hours, and Explain the price before the work begins. Shoe covers and drop cloths are standard on every job, not an upsell. And before we leave, we send a photo of the clean-up so you can see the space we left behind.
We service eight other major equipment brands alongside Lennox, including Carrier and Trane, so when you’ve got multiple systems or an older unit from a different brand, you’re not calling three companies. You’re calling one crew that knows your house. Luis Serrano, our owner, trained at Los Angeles Trade-Technical College and spent nearly two decades learning how Georgia humidity changes the way furnaces, coils, and ductwork behave. If he wouldn’t leave it that way in his own house, we’re not done yet.
FAQs
Yes. We honor remaining Lennox manufacturer warranties and will help you file warranty claims for covered parts. We’re an independent Lennox service provider, not a factory-authorized dealer, which means we work for you, not the manufacturer. If a part is under warranty, you pay only the labor. We’ll verify coverage before we order anything.
In most cases, same day or next morning. A live person answers our phone 24 hours a day, 7 days a week, so you’ll never sit in a voicemail queue while your house gets cold. We keep common Lennox parts stocked on the truck, which means we often finish the repair on the first visit. Call (478) 606-5046 and we’ll give you a real arrival window.
It depends on the part and your furnace’s age. For controls, gas valves, and variable-speed motors, we generally recommend OEM Lennox parts so you get the exact factory spec and protect any remaining warranty. For wear items like flame sensors and ignitors, quality aftermarket options can save you money without sacrificing reliability. We’ll lay out both options with prices before you commit.
As a rule of thumb, if the repair costs more than a third of what a new furnace would cost, and your Lennox is over 12 years old, we’ll tell you honestly that replacement deserves a look. A heat exchanger replacement on an aging unit often crosses that line. That said, a $180 flame sensor cleaning on a 10-year-old furnace is an easy yes. We’ll never recommend a replacement because it’s better for our bottom line. We’ll recommend it because it’s better for your house and your budget, and either way you get a written price to make the call.
Yes. A furnace tune-up runs $80 to $200 and includes a full safety check of the heat exchanger, gas valve, burners, and venting. We clean the flame sensor, check the ignitor’s resistance, measure gas pressure, and test all safety switches. You get a written report of what we found, and our technicians are not paid on what they sell, so there’s no pressure to green-light repairs you don’t need. Call (478) 606-5046 to schedule.
If your Lennox furnace is down and the house is getting cold, call (478) 606-5046 now. A live person answers. We’ll give you a straight answer, a realistic arrival time, and a written price before any work starts. That’s the way we’ve done it in Alpharetta for years, and that’s the way it’ll go when we’re standing in your hall with shoe covers on.
Written by Luis Serrano, Owner, Meadowsweet Heating and Air Alpharetta at Meadowsweet Heating and Air Alpharetta, serving Alpharetta and nearby areas.