Lennox Furnace Repair Nationwide

Lennox Furnace Repair in Marietta: What to Know First

Lennox furnace repair in Marietta typically runs between $150 and $700 depending on the part that failed, and most jobs are completed the same day we arrive. That’s the straight answer. We’re an independent Lennox service provider – not a Lennox dealer – which means we make parts and repair decisions based on what’s best for your furnace and your budget, not what a manufacturer program tells us to push.

Call (229) 514-0545

If your Lennox furnace is short-cycling, throwing an error code, or just won’t light, call (229) 514-0545 and a real person answers. We’ll get a tech headed your way with a live arrival time you can track to your door. Written price before any work starts. Every single time.

How Lennox Products Fail – and How We Fix Them

• Elite Series pressure switch faults (EL296V, EL195V). These high-efficiency models use variable-speed inducer motors that ramp up and down constantly. Over time, the pressure switch tubing collects condensation and dust, especially in Marietta basements and crawlspaces where humidity sits above 60% most of the year. The switch reads a false negative, the control board locks out, and you get an error code instead of heat. We clean or replace the tubing, verify the switch with a manometer (a gauge that measures gas and air pressure), and only replace the switch itself if it’s actually failed. A lot of companies shotgun a new switch on every visit. That’s a $280 part you often didn’t need.
• Merit Series ignitor failures (ML193, ML195). The silicon nitride ignitors on these entry-level Lennox models are the most common repair we do in Marietta. They get brittle after four to six years of cycling. When they crack, the furnace tries to light, the flame sensor never confirms ignition, and the board shuts the gas valve. We replace them with OEM-spec ignitors that carry a full written warranty. You’ll pay $150 to $325 for this repair, and we carry the part on the truck most days.
• Signature Series gas valve solenoids (SLP98V, SLP99V). These top-tier modulating furnaces run their gas valves constantly at partial output. That’s how they hit 98% AFUE (how much fuel actually becomes heat for your home). But the solenoid coils wear faster than on a standard single-stage valve. Symptom: the furnace lights, runs for 10-15 minutes, then shuts down with a lockout code. We test coil resistance on site, confirm it’s outside spec, and replace the valve assembly. This is a $400 to $700 repair. It’s also the one we most often see misdiagnosed as a control board issue.
• Heat exchanger cracks on 20+ year-old Lennox units (G26, G51, G60). These workhorses from the late 90s and early 2000s are still in thousands of Marietta attics and basements. When we find a cracked heat exchanger, we show you a photo from the inspection camera before we recommend anything. A cracked exchanger vents carbon monoxide into your home – this is not a repair. We shut the furnace down and quote a replacement. No scare tactics, just a photo and a straight answer.
• Condensate drain clogs on high-efficiency models (EL296E, SL280V). Every condensing Lennox furnace produces acidic water as a byproduct of pulling more heat from the exhaust. In Marietta’s hard water areas – we see this constantly in East Cobb and around Kennesaw – the drain traps and hoses crust up with mineral scale. The furnace shuts down with a pressure switch error even though nothing electrical is wrong. We clear the trap, flush the hoses, and test the full cycle. Most of these calls cost under $200. It’s the cheapest “furnace won’t run” fix we do.

Our Lennox Furnace Repair Process

1. 1
   You call or book online. A real person answers 24/7. We schedule a window that actually works, and you get a live arrival time with a link to track the tech to your door.
2. 2
   The tech shows up, introduces themself, and goes over the symptoms. Background-checked, uniformed, no mystery contractor energy. They’ll ask when the problem started, whether it’s getting worse, and what the thermostat is doing.
3. 3
   Full diagnostic with the panel open. We run the furnace through a full cycle, test gas pressure, check voltage and resistance across the ignition and safety circuits, and pull error codes from the board. If it’s a heat exchanger concern, an inspection camera goes into the burner compartment.
4. 4
   Written price, before tools touch the unit. We show you exactly what’s wrong, what the fix is, and what it costs. OEM part or quality aftermarket – we explain the difference and the warranty on each. You approve the work before we start. No door-step surprises.
5. 5
   The repair, the re-test, and the cleanup. We install the part, cycle the furnace multiple times, verify temperatures at the supply and return, and leave the space as clean as we found it.
6. 6
   Written guarantee on every repair. Every Lennox repair gets a written guarantee. If it fails within the coverage window, the return visit is free. No arguing, no phone tag, no fine print. It’s automatic.

What Lennox Furnace Repair Costs in Marietta

Here’s what we see in real Marietta homes, depending on the Lennox model and what actually failed:

• Ignitor replacement: $150 – $325
• Flame sensor cleaning or replacement: $85 – $195
• Pressure switch testing, tubing, or replacement: $130 – $320
• Gas valve replacement: $350 – $700
• Blower motor capacitor or replacement: $180 – $650
• Condensate drain clearing: $95 – $185
• Diagnostic-only visit (if you decline repair): typically $89, credited back if you proceed

The three things that move your price: which part failed, whether we use OEM or quality aftermarket (your call, always explained in plain English), and how long the job takes. No hidden dispatch fees, no “labor multiplier” on weekends. Call (229) 514-0545 and ask, straight up, what a diagnostic costs. We’ll tell you. Written price before we open the panel. Free estimates, always.

Why Marietta Homeowners Call Halden Heating and Air Marietta for Lennox Work

We’re independently owned and operated, founded in 2004, and part of the Relay Home Co. network – which means we run on The Relay Visibility Guarantee. That’s the standard where you book online, track your tech to the door, and lock a written price before any work starts. Not a four-hour window, not a voicemail tree, not a “we’ll see when we get there” quote. Calls are answered by a live person around the clock. And every repair carries the 365-Day Done Right Promise: a full year of accountability, with a free second visit if the repair fails within the guarantee window.

We work on Lennox units every week in Marietta – from the old G-series tanks in spray-foamed attics to the newest SLP99V modulating systems in new construction near Kennesaw Mountain. And if your Lennox needs more than a repair and we’re talking replacement, we still service Carrier and Trane too, so you’re never stuck with a single brand’s price tag. Andre Fuller and his crew trained on this equipment and see its failure patterns every season. Straight answer, written price, done right.

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