Lennox AC Repair Nationwide

Lennox AC Repair in Marietta: What to Know First

Lennox AC repair in Marietta typically runs $150 to $650, and most calls we handle are diagnosed and fixed the same day. We’re an independent Lennox service provider, which means we repair the system you already own without pushing a replacement you don’t need. The price you get before we start is the price you pay when we leave.

Call (478) 662-5175

If your Lennox unit is blowing warm, short-cycling, or making a sound it didn’t make last summer, this page will tell you what’s likely wrong, what it’ll cost, and what to ask any contractor before they touch it. Want a straight answer? Call (478) 662-5175 and describe what it’s doing. We’ll tell you what it needs.

How Lennox Products Fail – and How We Fix Them

Every brand has tells. Lennox units are efficient and well-built, but after fifteen-plus years in Marietta’s humidity, certain failure patterns show up more often than others. Here’s what we see on the job:

• XC21 and XC25 compressors tripping on high head pressure. These high-efficiency two-stage and variable-capacity units run tighter tolerances than older single-stage systems. When coils get even partially choked with Georgia pollen and cottonwood fuzz, head pressure climbs and the compressor shuts down on thermal overload. We don’t just reset the breaker and call it done. We pull the condenser top, flush the coil, check the fan motor’s capacitor, and confirm the system holds proper pressure before we leave.
• Signature and Elite series evaporator coil leaks. Lennox’s cased coils are tight and efficient, but we’ve seen a pattern of formicary corrosion on older coil fins in Marietta homes, especially units running on the original charge for eight-plus years. A slow refrigerant leak means the system cools less and less, then freezes up. We use electronic leak detection to pinpoint the hole before recommending repair or coil replacement, and we don’t condemn a coil until we’ve proven where the refrigerant is escaping.
• Merit series run capacitors failing in August. This isn’t a Lennox-only issue, but the Merit line is the entry-level series, and in Marietta’s late-summer heat, capacitors on these units take a beating. A weak capacitor means the compressor or condenser fan motor hums but won’t start, or starts sluggishly. We stock quality replacement capacitors rated for high-heat service, not the cheap ones that fail again in six months.
• Variable-speed blower motor module failures. Lennox Signature series air handlers use electronically commutated motors (ECMs), and the control module can fail independent of the motor itself. The symptom is often a fan that runs at one speed regardless of demand, or shuts off entirely. We test the module and the motor separately because replacing only the failed part saves hundreds over swapping the whole motor assembly.
• Thermostat communication errors on iComfort systems. Lennox iComfort thermostats talk to the outdoor unit and air handler through a serial communication protocol. When that signal drops due to a damaged thermostat wire, a bad connection, or a fried control board, the system can go completely unresponsive even when the compressor and air handler are perfectly fine. We trace the communication bus with a meter before replacing any parts, because throwing boards at a communication fault without finding the broken wire is exactly how people end up with a $2,000 bill for a $200 problem.

Our Lennox AC Repair Process

Devin Marlowe built our process around one rule: tell the homeowner what’s wrong, what it costs, and what happens next, before any wrench turns. Here’s what a Lennox repair call looks like with us:

1. 1
   You call and talk to a person. Not a recording, not a callback queue. You’ll describe the symptom, and we’ll ask a few targeted questions: Is it blowing warm or not blowing at all? Any ice on the outside lines? Does the outdoor unit sound normal? We’ll tell you who’s coming and send their name and photo before they arrive.
2. 2
   Diagnosis, documented. Our tech arrives badged, checks the thermostat settings and the obvious first, then works through the electrical and refrigerant side. On Lennox systems with diagnostic codes on the control board, we pull those codes and explain what each one means in plain language.
3. 3
   Written price, no surprises. Before we do any work, you get a written quote. Parts and labor are itemized. If the repair needs an OEM Lennox part or a quality aftermarket equivalent, we’ll tell you the price difference and what trade-offs, if any, come with each.
4. 4
   The repair and the test. We use correct parts and proper procedures, including proper evacuation if we’re opening the refrigerant circuit. No shortcuts, no “sealant in a can” fixes that void warranties.
5. 5
   System verification. After the repair, we run the system through a full cooling cycle. We check temperature split, refrigerant pressures, and amp draw. If the unit was the problem, it should now be doing exactly what it’s supposed to.
6. 6
   Cleanup and guarantee. We leave your yard and mechanical room cleaner than we found them, and every repair includes a written guarantee. If it fails within the covered period, we come back at no charge. That’s our 365-Day Done Right Promise.

What Lennox AC Repair Costs in Marietta

Here’s the honest pricing picture for the Lennox repairs we handle most often in Marietta:

• Capacitor replacement: $150 – $250, parts and labor included. This is the single most common August repair we do on Lennox Merit and Elite units around Marietta Square and the Kennesaw Avenue corridor.
• Refrigerant recharge (plus leak check): $250 – $450 depending on the system’s refrigerant type and charge size. If the unit is old and uses R-22, expect the higher end – that refrigerant is expensive and getting harder to source. We’ll always find and address the leak, not just top off and run.
• Condenser fan motor replacement: $300 – $500, depending on whether it’s single-speed or variable-speed.
• Compressor or coil replacement: $450 – $650 for coil work; compressor replacement on an out-of-warranty unit may push toward or beyond the top of the repair range, at which point we’ll give you the straight math on repair versus replacement.

What moves the price? The age and refrigerant type of your system, the part that failed, and whether we’re working at 2 p.m. or 2 a.m. We don’t charge overtime for nights and weekends, and every quote is written and fixed before we start. Call (478) 662-5175 for an exact quote – estimates are free.

Why Marietta Homeowners Call Brandt HVAC Co Marietta for Lennox Work

We know Lennox equipment because we’ve worked on it in Marietta homes for years. Marietta heat and humidity push systems hard, and older homes near Marietta Square often have equipment jammed into tight mechanical closets or crawlspaces. That changes how a job is done, and it’s why shortcuts fail here more than in flatter, drier climates.

Every tech who arrives at your door is background-checked and identity-verified under our Threshold Verified standard. You’ll know their name and see their face before they arrive, and they’ll show a photo ID before they step inside. Calls are answered by a live person 24 hours a day. If we can’t fix your Lennox the first time, our 365-Day Done Right Promise brings us back free. We service Carrier and Trane as well, but Lennox is a big share of what we see in Marietta, and the patterns above come from real work, not a training manual.

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