Lennox HVAC Service Nationwide

Lennox HVAC Repair & Service in Marietta

Why Marietta Homeowners Choose Lennox HVAC

Lennox builds some of the most efficient air conditioners and furnaces on the market, and Marietta homeowners run them hard from April through October. We’re an independent Lennox service provider in Marietta, which means we repair and install these systems without being tied to a manufacturer’s sales quota or warranty paperwork maze. Andre Fuller and our techs have torn down and rebuilt Lennox equipment across Cobb County for years, and we know these machines well enough to diagnose them fast and fix them right the first time. If your Lennox system is acting up in Marietta, call (229) 514-0545 and we’ll give you a straight answer, a written price, and a real arrival time you can track on your phone.

Lennox has earned a strong following in Marietta for good reason. Their Elite and Signature lines deliver efficiency numbers that genuinely lower summer power bills, and the build quality on their higher-end furnaces holds up in Georgia humidity. But every brand has its weak points. Lennox heat pumps develop defrost board failures. Their high-efficiency furnaces throw blower motor codes. Their evaporator coils leak refrigerant at the u-bends. We see these exact issues in Marietta weekly, and we know which ones are a $200 fix versus a $2,000 decision. That’s the difference between calling someone who has actually rebuilt these units and calling someone who’s going to google the error code while standing in your hallway.

Why Trust Halden Heating and Air Marietta for Your Lennox HVAC?

Andre grew up in Los Angeles and picked up his HVAC fundamentals at Los Angeles Trade-Technical College before spending the better part of two decades turning wrenches on everything from rooftop package units to crawlspace air handlers. He built Halden Heating and Air on one rule he picked up early: put the price in writing before anyone opens a panel. That rule applies to every Lennox repair, tune-up, and installation we do in Marietta.

Our technicians don’t need a manual to identify a Lennox G26 versus a G40. They’ve pulled SureLight ignitors out of both, replaced defrost sensors on XP and XC heat pumps, and diagnosed variable-speed blower motor failures on EL296V and SLP98 furnaces. We stock common Lennox OEM parts locally in Marietta so we’re not waiting on a distributor in Atlanta when your furnace quits in January. And because we’re independent, we answer only to you. No manufacturer territory rules, no quota-driven upselling. Just the repair your system actually needs, documented with a written guarantee on every job.

Common Lennox HVAC Problems We Fix in Marietta

Here are the Lennox-specific failures we see repeatedly in Marietta homes, from slab ranch houses in east Cobb to older bungalows near the Square:

• Defrost control board failures on XP and XC heat pumps. Marietta’s humid winters mean heat pumps cycle through defrost mode constantly. The boards short out over time, and the unit ices up even when it’s 45 degrees outside. We diagnose the board directly and replace it with an OEM or proven aftermarket part, usually same day.
• Ignitor failures on G26 and older G40 furnaces. These furnaces use hot-surface ignitors that get brittle after a decade of heating cycles. A power surge from a summer thunderstorm can crack one instantly. The symptom is a furnace that tries to fire but never lights. We stock SureLight ignitors in Marietta and can have your G26 firing again in under an hour.
• Refrigerant leaks at the evaporator coil. Lennox residential AC units, especially XC21 and older Elite models, tend to leak at the u-bend joints on the evaporator coil. You’ll notice warm air, longer run times, and a hissing sound near the air handler. We locate the exact leak point, repair it with proper brazing, and recharge your system to manufacturer spec.
• Variable-speed blower motor module failures on SLP98 and EL296V furnaces. These modulating furnaces are brilliant when they work. When the blower motor module fails, the board throws a fault code and the fan runs at full speed or not at all. We test the motor separately from the control module so you’re not paying for both when only one failed.
• Pressure switch faults on high-efficiency Lennox condensers. Clay-heavy Marietta soil shifts foundations and pulls duct connections loose in crawlspaces. That changes static pressure, and Lennox pressure switches are sensitive to it. We check the actual pressure readings with a manometer instead of throwing a new switch at the problem and hoping.

Lennox Parts & Our Repair-vs-Replace Approach

OEM Lennox parts cost more than aftermarket, and sometimes they’re worth it. Ignitors, defrost sensors, pressure switches, and blower motors are components where we recommend genuine Lennox parts because the tolerances matter and the fit is exact. For older Lennox units with obsolete circuit boards, we use trusted aftermarket replacements from manufacturers we’ve vetted over years of installs. We tell you which we’re using and why, in writing, before any work starts.

The bigger decision is repair versus replace. If your Lennox compressor has failed on a 14-year-old AC unit, we’ll tell you the compressor costs $1,800 and the new system costs $4,500. That’s a conversation, not a sales pitch. Same with a cracked heat exchanger on a G26: we’ll show you photos of the crack, explain the safety risk, and give you a written price for both the replacement part and a new furnace. You choose. Our only job is making sure you have the real numbers in front of you. Call (229) 514-0545 for a repair assessment.

Our Lennox Service Process – Step by Step

1. 1
   Diagnosis. You book online, get a live arrival time, and track your tech to the door. We start by listening: what the system is doing, when it started, what you’ve already tried. Then we test. On a Lennox furnace with an error code, we read the code history, check the sequence of operation, and test components individually with a multimeter.
2. 2
   Written price. We hand you a line-item price before any tool touches a screw. No estimate range. No “we’ll see once we get in there.” The price covers parts, labor, and the exact work we’ll do. You approve it, we start. You don’t approve it, we leave and you owe nothing for the diagnostic.
3. 3
   Repair or install. For repairs, we use OEM Lennox parts where they matter and proven aftermarket where they don’t. For installations, we handle the full job: load calculation, equipment ordering, permit paperwork, and the install itself on a scheduled date.
4. 4
   Testing and documentation. After any Lennox repair, we run the full sequence of operation and check temps, pressures, and airflow. You get before-and-after photos and a written report of what we found and what we did.
5. 5
   Warranty and follow-up. Every repair includes our 365-Day Done Right Promise in writing. If the same problem returns within the coverage window, our second visit is free. No arguing, no fine print.

Lennox Products We Service & Install in Marietta

We work on Lennox equipment from four main product families: the Merit Series (ML14XP1 heat pumps, ML180 furnaces), the Elite Series (EL296V modulating furnaces, EL280 two-stage furnaces), the Signature Collection (SL280 furnaces, XC21 air conditioners, SLP98 modulating furnaces), and the Dave Lennox Signature Collection (XP25 heat pumps, the flagship variable-capacity line). That covers furnace installs, AC installs, heat pump repair, and furnace tune-ups on nearly every Lennox unit in Marietta. We stock common Lennox OEM parts locally so repairs move fast, and we install new Lennox equipment when the math favors replacement.

We Also Service These Brands

Lennox is our focus on this page, but it’s not the only brand we know. We service Carrier, Trane, Goodman, Rheem, York, Daikin, Bryant, and American Standard equipment across Marietta. If you have a Carrier heat pump and a Lennox furnace in the same house, one call handles both.

FAQs – Lennox HVAC Service in Marietta

Is Halden Heating and Air Marietta authorized by Lennox?

No, we’re an independent Lennox service provider in Marietta, not a factory-authorized dealer. That means we can diagnose and repair honestly without manufacturer sales quotas or warranty upselling pressure. We service and install Lennox equipment using OEM parts where it matters.

Do you use genuine Lennox/OEM parts for repairs?

Yes, for components where the OEM part is the right call: SureLight ignitors, defrost sensors, pressure switches, blower motors, and control boards on current Lennox models. For obsolete or discontinued Lennox parts, we use aftermarket replacements we’ve vetted through years of installs and repairs in Marietta.

How long does Lennox service take?

Most Lennox repairs in Marietta are completed same day. We stock common parts locally, and our techs carry the diagnostic tools and replacement components needed for typical Lennox heat pump and furnace failures. If your specific part needs ordering, we’ll tell you the exact timeframe before you approve anything.

What Lennox models and series do you cover?

We service and install the Merit Series (ML14XP1, ML180), Elite Series (EL296V, EL280), Signature Collection (SL280, XC21, SLP98), and Dave Lennox Signature Collection (XP25). If your Lennox unit has a model number on it, we’ve almost certainly worked on that series in Marietta.

Will service void my Lennox warranty?

No. Independent service does not void a Lennox manufacturer warranty. We follow manufacturer service procedures, use OEM parts where specified, and document all work properly. If you have an active Lennox warranty, we’ll help you file the claim and get covered parts at no cost to you.

How much does Lennox HVAC service cost in Marietta?

Lennox repair and installation costs in Marietta depend on the unit and the failure. Here are typical ranges we see across Cobb County:

These ranges reflect real Marietta job pricing, not manufacturer list prices. The exact number depends on the Lennox model, the failed part, and the labor involved. Call (229) 514-0545 for a written quote on your specific system.

How do I know if my Lennox defrost board is failing?

Your Lennox heat pump will ice up even in mild Marietta weather, and the defrost cycle either won’t start or runs constantly. We test the board directly rather than replacing it on a hunch. A failing defrost board typically shows a burned relay or a corroded capacitor on the board itself.

Why does my Lennox SLP98 furnace throw a blower motor fault?

The SLP98’s variable-speed blower motor module is a known weak point. The motor itself may be fine while the control module on top of it fails, tripping error codes. We test the motor and module separately so you only pay for the part that actually died. In Marietta’s humid summers, the module also suffers from moisture intrusion in crawlspace-mounted air handlers.

Can you fix a refrigerant leak on my Lennox XC21 without replacing the whole coil?

Yes, in most cases. We locate the exact leak point, usually at the u-bend joints on the evaporator coil, and repair it with proper brazing technique. Then we pressure-test with nitrogen and recharge to Lennox spec. Full coil replacement is only necessary when the coil is so corroded that multiple leak points are developing.

My Lennox G26 furnace won’t ignite. Is it the ignitor?

It often is, especially after a power surge. The G26 uses a hot-surface SureLight ignitor that gets brittle with age. We test the ignitor’s resistance first. If it’s cracked or reading out of spec, we replace it with an OEM Lennox SureLight ignitor and have your furnace firing the same visit.

Our field note from Marietta

Our tech found an EL296V furnace in a Marietta split-level short-cycling and throwing a limit switch code. The heat exchanger was fine, but the induced draft motor bearing had seized. We replaced the motor with an OEM part, cleaned the flame sensor, and had the furnace back to full modulation the same afternoon. That’s the kind of fix that makes a Lennox owner’s winter a whole lot better.

Book Your Lennox Service in Marietta, GA

If your Lennox heat pump is icing up, your furnace is throwing codes, or your AC just can’t keep up with Marietta’s July heat, call (229) 514-0545. We answer live, 24/7, and we’ll give you a straight answer, a written price, and a live arrival time before we ever knock on your door. Straight answer, written price, done right. That’s how Andre Fuller and the Halden Heating and Air Marietta team work.

Written by Andre Fuller, Owner at Halden Heating and Air Marietta, serving Lennox in Marietta and surrounding Cobb County since 2004.