Lennox AC Repair Nationwide

Lennox AC Repair in Marietta: What to Know First

Lennox AC repair in Marietta typically runs between $150 and $650 depending on the part that failed, and most jobs are completed in a single visit. We’re an independent Lennox service provider in Marietta, not a manufacturer warranty center, which means we diagnose what’s actually wrong and give you a written price before any work starts. If you own a Lennox system and it’s blowing warm air, short cycling, or making noise it shouldn’t, call us at (229) 514-0545 and we’ll get a tech to your door with a live arrival time you can track.

Call (229) 514-0545

This page is for Marietta homeowners with Lennox equipment who want to know what’s failing, what it costs, and whether it’s worth repairing. Straight answer, written price, done right.

Key Takeaways:

• Most Lennox AC repairs in Marietta cost between $150 and $650
• We service all major Lennox lines including Elite, Merit, Dave Lennox Signature Collection, and XC/XP series heat pumps
• Every repair includes a written guarantee and a free return visit if it fails
• Same-day service is available for urgent cooling failures during Georgia summers

How Lennox Products Fail – and How We Fix Them

After years of working on Lennox equipment across Marietta neighborhoods, we know which failures show up over and over. Here are the five most common Lennox-specific issues we see, what actually causes them, and what we do about it.

• Elite Series capacitor failures (XC13, XC16, EL16XC1). Lennox Elite units run dual-run capacitors that take a beating in Georgia heat. When a capacitor goes, the compressor or fan won’t start, or the unit hums and trips the breaker. In Marietta’s July humidity, we replace more capacitors in these units than any other single part. We test the capacitor under load, not just with a multimeter on the bench, because a capacitor can read fine cold and fail hot.
• Merit Series evaporator coil leaks (ML14XC1, 13ACX). The Merit line is Lennox’s entry-level series, and the evaporator coils in these units are more prone to pinhole leaks than coils in the Signature line. Homeowners notice the system runs but doesn’t cool, or the air feels damp. We pressure-test the coil with nitrogen to confirm the leak before quoting anything, so you’re not paying for a refrigerant recharge that just leaks back out.
• Signature Series inverter board faults (XC25, XP25). The high-efficiency variable-capacity Lennox systems use inverter-driven compressors controlled by a main control board. These boards are expensive, and we see them fail from power surges in Marietta homes without surge protection. Before replacing the board, we check the incoming voltage, the compressor windings, and the thermistors. The board is often the symptom, not the root cause, and we won’t sell you a $900 board if the real issue is a $150 thermistor.
• Condenser fan motor bearing wear (all outdoor units). Lennox outdoor units sit in Marietta’s red clay dust and pollen. The fan motor bearings absorb it. You’ll hear a squeal or a grinding noise before the fan stops entirely. We use sealed-bearing replacement motors when available, which handle Marietta’s dust better than open-bearing motors, and we always check the fan blade pitch before we call the job done.
• Thermostat communication dropouts on iComfort systems. Lennox iComfort thermostats talk to the equipment using a proprietary communication protocol, not standard 24-volt wiring. When the thermostat loses communication, the system locks out and the house gets hot fast. We check the low-voltage wiring, the thermostat firmware, and the equipment interface module before replacing anything. In older homes around Marietta Square with original wiring, we sometimes find the issue is a spliced wire in the wall, not the thermostat itself.

Our Lennox AC Repair Process

Here’s how a typical Lennox repair call goes when you book with us in Marietta.

1. 1
   You book online or call. We answer the phone 24/7 with a real person. You’ll get a live arrival time, not a four-hour window, and you can track the tech to your door.
2. 2
   The tech arrives and listens. Before opening anything, our tech asks what you’ve noticed: when it started, what it sounds like, which rooms are warm. That history narrows the diagnosis faster than any test.
3. 3
   We diagnose in front of you. Our tech tests the system methodically: voltage, refrigerant pressures, capacitor health, airflow, and control signals. We show you what we find and explain it in plain English. A refrigerant recharge is topping off the coolant your system needs to produce cold air. A capacitor replacement is swapping out the part that gives the compressor and fan their starting jolt.
4. 4
   You get a written price before any work. We quote the repair, parts included, on paper. No surprises at the door. If the part is available, we fix it right then. If it’s a specialty Lennox part ordered for next-day, we schedule the return visit before we leave.
5. 5
   We test the full system after the repair. Not just the part we replaced. We measure temperature drop across the coil, verify refrigerant levels, check amperage draw, and make sure the thermostat is talking to the equipment.
6. 6
   You get the written guarantee before we leave. Every repair comes with our 365-Day Done Right Promise. If it fails within the coverage window, we come back at no charge. Free return visit, automatically included.

What Lennox AC Repair Costs in Marietta

Here’s what we charge for common Lennox repairs in the Marietta market. No vague estimates. These are the ranges we quote from, and your written price comes before the work starts.

• Capacitor replacement: $150 – $350 depending on your Lennox model and whether it’s a single or dual-run capacitor
• Refrigerant recharge (if no leak found): $200 – $500 depending on how many pounds of R-410A your Lennox system needs
• Evaporator coil replacement (Merit/Elite lines): $450 – $650 for the labor and coil on most residential splits
• Condenser fan motor replacement: $250 – $450 including the sealed-bearing motor and labor
• Control board or inverter board replacement: $350 – $650 depending on the series and board

What moves the price: the specific Lennox model and series (Signature parts cost more than Merit parts), refrigerant type, and whether the part is in our truck or needs a supplier run. We use OEM Lennox parts when they’re available same-day and quality aftermarket parts when they’re outselling OEM on reliability for that specific part. You’ll know which one we’re quoting and why. Call (229) 514-0545 for an exact quote on your Lenox system. The estimate is free.

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

We’re an independently owned and operated HVAC business in Marietta, founded in 2004, and part of the Relay Home Co. network. That means we’re held to The Relay Standard and The Relay Visibility Guarantee on every job. Our techs are background-checked, uniformed, and sent to you with a live arrival time you can track to your door, like a rideshare for your AC repair.

Every Lennox repair we complete includes a written guarantee. Not a verbal promise. Paper. And if the repair fails within the coverage window, our free second visit kicks in automatically. No arguing, no phone tag. Andre Fuller built Halden Heating and Air on one rule: put the price in writing before anyone opens a panel. That applies to every Lennox Elite, Merit, or Signature system we touch. We also work on Carrier and Trane equipment, so if your home has mixed brands across two floors, one call covers both systems.

FAQs