Lennox AC Maintenance Nationwide

Lennox AC Maintenance in Marietta: What to Know First

Lennox AC maintenance in Marietta typically runs $80 – $200 for a full tune-up, and most appointments are completed within a 60 – 90 minute window once our technician arrives. We’re an independent Lennox service provider, so our tune-up decisions are based on what your system actually needs – not what a manufacturer program tells us to sell. This page is for Marietta homeowners who own a Lennox and want straight answers about keeping it running through Georgia heat.

Call (478) 662-5175

If your Lennox is making a noise it didn’t make last summer, short-cycling, or just not cooling like it used to, call (478) 662-5175. We’ll send a background-checked technician whose name and photo you’ll have before they ring the bell.

How Lennox Products Fail – and How We Fix Them

Lennox builds good equipment, but every line has its habits. Here’s what we actually see on service calls across Marietta, from the older neighborhoods near the Square to newer construction out Powder Springs Road:

• XC and XP series (Elite and Signature lines): These units run tight refrigerant tolerances. When the evap coils start to corrode, often around year 8 – 10 in Marietta’s humid summers, they leak slowly. Homeowners notice the upstairs bedrooms warm up a few degrees before anything else. Our fix starts with a leak search using electronic detection, then we quote the repair as a written line item – coil replacement runs $650 and up on these models, parts and labor included, and we’ll tell you plainly if a replacement makes more sense.
• Merit series (ML14, ML16): The workhorses of the Lennox lineup, but the contactors wear out faster than the compressor, especially in areas with frequent afternoon storms causing power flickers. Symptom: an outdoor unit that hums but doesn’t start. We replace the contactor for $150 – $300 rather than pushing a whole new unit.
• Furnace-matched systems (SLP, EL series with cased coils): The coupling between the air handler and the coil pan can trap condensation, and once that pan rusts through, you get water staining on the closet ceiling. We see it often on older homes near Kennesaw Avenue where the installs date back 15 – 20 years. Our maintenance includes pulling the panel and checking for exactly that before it becomes a ceiling repair.
• iComfort thermostats and control boards: Communication errors between the thermostat and the outdoor board are an underappreciated failure point. If your Lennox is showing a “communication loss” code, the common culprit is a degrading low-voltage connection at the outdoor unit, not the thermostat itself. We clean and reseat terminations before quoting any control board replacement.
• Two-stage compressors (XC21, XC25): These are efficient units, but Marietta’s pollen and construction dust build up on the outdoor coil faster than most homeowners realize. A fouled coil forces the second stage to run constantly, which is why some Lennox owners see higher power bills even when the house feels cool. A proper coil cleaning, done with the right chemicals and water pressure, is a core part of our $80 – $200 tune-up.

Our Lennox AC Maintenance Process

Here’s what happens when you schedule Lennox AC maintenance with Brandt HVAC Co Marietta:

1. 1
   You call and a live person answers. In fact, a live person always answers – 24 hours a day, weekends included. You’ll tell us what the Lennox is doing, and we’ll schedule a window that works for you.
2. 2
   You learn who’s coming before they arrive. We send the technician’s name and photo to your phone ahead of the visit. The same person shows up in uniform, shows a photo ID badge at the door, and verifies the appointment. That’s the Threshold Verified standard, and if someone shows up who you weren’t told to expect, that visit is on us.
3. 3
   We inspect and diagnose – written before any work. The technician runs the full tune-up: condenser coil condition, amp draws on the compressor and fan motor, refrigerant pressures, capacitor microfarad readings, condensate drain flow, thermostat calibration, and electrical connections. Devin Marlowe trained his crew to treat every Lennox as if it’s the only unit they’ll see that day. Once the inspection is done, you get a written price for anything that needs fixing before a single part is ordered or tool is picked up.
4. 4
   We recommend OEM or quality aftermarket – and explain the difference. For Lennox units under warranty, we strongly recommend OEM parts so the manufacturer warranty stays intact. For out-of-warranty systems, we’ll present both options with honest durability notes. You decide.
5. 5
   We perform the work, test the system, and leave your property clean. Every repair and every tune-up gets a before-and-after test. If we touched the condenser, we verify the temperature split at the return and supply. If we serviced the drain, we run water through it and confirm it clears.
6. 6
   You get a written guarantee. Every repair is guaranteed in writing. If it fails, we come back free under our 365-Day Done Right Promise. No argument, no second invoice. That’s the deal.

What Lennox AC Maintenance Costs in Marietta

Here are the numbers we quote on the phone, so you know exactly what to expect before we arrive:

• Full Lennox tune-up: $80 – $200, depending on system age, access difficulty, and whether it’s a heat pump or straight AC. This includes condenser cleaning, electrical inspection, refrigerant check, drain clearing, and thermostat calibration.
• Capacitor replacement: $150 – $300, parts and labor included.
• Contactor replacement: $150 – $300, parts and labor included.
• Refrigerant recharge following a leak repair: $250 – $650 depending on the leak location and how much refrigerant the system needs.
• Full system replacement (if the tune-up reveals a terminal problem): $3,500 – $7,500 for a properly sized install with load calculation, never a guess.

What moves the price on a Lennox? Age and accessibility are the big two. A 20-year-old Merit series in a tight Marietta crawlspace takes longer to service than a 7-year-old Elite with clear access. Humidity also plays a role here. A coil that’s been breathing Georgia moisture for a decade is going to need more cleaning labor than the same unit would in Phoenix. We’ll show you the price in writing before any work starts, and the estimate is always free. Call (478) 662-5175 for an exact quote.

Why Marietta Homeowners Call Brandt HVAC Co Marietta for Lennox Work

We didn’t build this company to be the cheapest HVAC shop in Cobb County. We built it for people who want to know exactly who is walking through their door and exactly what that person will do once they’re inside. Every Brandt HVAC Co Marietta technician is background-checked, identity-verified, and introduced to you by name and photo before arrival. Devin Marlowe, our owner, has been working on HVAC systems across the South for nearly three decades – he learned the trade at Los Angeles Trade-Technical College and has spent the years since learning the particular habits of both the equipment and the houses around Marietta. That matters when your Lennox is acting up and you want a diagnosis, not a sales pitch.

And while we’re a Lennox specialist, we also service Carrier and Trane daily. So if your repair leads to the hard conversation that the unit isn’t worth saving, our recommendation isn’t boxed in by brand loyalty. We recommend what’s right for your house and your budget – and the price is always in writing before you say yes.

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