Lennox Heat Pump Service Nationwide

Lennox Heat Pump Service: The Marietta Owner’s Guide

We stock Lennox-compatible heat pump parts on our trucks and install them daily across Marietta. Most Lennox heat pump repairs in this area run between $150 and $650 installed, depending on whether it’s a capacitor, contactor, defrost control board, or reversing valve. If your system is down, call us at (229) 514-0545 before 2 p.m. and we can usually get a technician to your door the same day.

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The way most Marietta homeowners discover a heat pump part has failed is pretty predictable. It’s either the middle of July and the house won’t cool, or it’s January and the system is blowing lukewarm air. Sometimes the outdoor unit is running but the indoor air handler isn’t, or vice versa. Other times the whole thing is dead silent. That’s when the phone comes out, and that’s when you want someone who actually knows Lennox equipment, not someone who’s going to show up and guess.

Key Takeaways:

• We service all Lennox heat pump series, from the builder-grade Merit line to the variable-capacity Signature line
• Written price before any work starts, every time, no exceptions
• Genuine Lennox OEM parts and quality aftermarket equivalents, whichever fits your budget and timeline
• Every repair carries a written guarantee with a free second visit if it fails

Which Lennox Models This Applies To

Lennox splits their heat pump lineup into three series: Merit, Elite, and Signature. The Merit series is the entry-level line you’ll find in a lot of Marietta tract homes and older subdivisions. Elite is the mid-range, and Signature is the top tier with fully variable compressors and communicating controls. The parts we service span all three.

Here’s the compatibility gotcha most people don’t know: Lennox changed their defrost control board design between the 13GEP and 14HPX model generations, and a board from one won’t always talk to the thermostat in the other. Even within the same series, there are running changes. We’ve swapped boards in East Cobb homes where the homeowner bought a part online, matched the model number, and still ended up with the wrong revision. That’s why we always pull the actual part number off the failed component before ordering anything.

On the OEM versus aftermarket question: for things like capacitors and contactors, a quality aftermarket part from a brand like Supco or Packard works just as well and often lasts longer than the factory part, because Lennox sources budget electricals on their entry-level units. But for communicating boards, variable-speed motors, and anything tied to the Lennox iComfort thermostat platform, we strongly recommend genuine Lennox OEM parts. The aftermarket stuff simply doesn’t integrate cleanly with the proprietary communication protocol.

Signs Your Lennox Heat Pump Service Is Failing

• Outdoor unit runs but the air inside is warm or barely cool. This usually points to a failed reversing valve, a compressor that’s not pumping, or low refrigerant from a leak. The reversing valve is the part that flips the heat pump from cooling to heating mode; when it sticks halfway, neither mode works right.
• The system kicks on and off every few minutes. Short cycling in Marietta is often a failing run capacitor or a dirty outdoor coil, but on Lennox units with communicating thermostats, it can also be a sensor sending bad data to the board. A hard-start capacitor is sometimes a band-aid; a proper diagnosis is better.
• The outdoor unit is iced up in the winter. Some frost is normal, but a solid block of ice means the defrost control board or the defrost thermostat has failed. The unit can’t clear its own coil, and it’s working against itself.
• You hear a loud buzzing or clicking from the outdoor unit, then nothing. This is the classic failed contactor on a Lennox Merit-series unit. The contactor is the electrical switch that lets power flow to the compressor and fan. When its contacts burn out, the unit just sits there humming.
• The thermostat says the system is running, but nothing is happening. This is often a blown control board fuse or a failed transformer. We see this a lot after the Georgia thunderstorms that roll through Cobb County in the spring. A power surge takes out the board, and the whole system goes dark.

Replacement Cost & What’s Included

In Marietta, a Lennox heat pump repair lands in the $150 to $650 installed range for most parts. A capacitor swap is on the low end, usually $150 to $250 with the part. A contactor runs $180 to $300. A defrost control board is $300 to $500 installed. A reversing valve replacement is the big-ticket item; that’s typically $600 to $1,400 because it involves recovering the refrigerant, cutting and brazing copper lines, pulling a vacuum, and recharging the system.

What drives the range is three things: the part itself, the labor hours the job requires, and whether your unit needs additional diagnostic time to confirm the failure. Every quote we give is a written, line-item price delivered before we open a panel. The labor, the part, the refrigerant if applicable, and the warranty terms are all on paper. You sign off, then we start. No surprises at the door, ever.

Every repair we do in Marietta includes a written guarantee. If the part fails within the coverage window, we come back at no charge. That’s automatic; it’s not an add-on, and you don’t have to ask for it. Andre built this company, from the first service van to the crew we run now, on one rule: put the price in writing before anyone opens a panel.

DIY or Call Us?

Here’s what you can safely check yourself: make sure your thermostat is set correctly and has fresh batteries. Check that the breakers at your electrical panel haven’t tripped. Confirm the outdoor unit isn’t buried in leaves or pine straw, which is a constant battle this time of year in Marietta. Look at the air filter and replace it if it looks like a felt blanket. Those checks are free and they take five minutes.

Where DIY goes wrong is anything involving electricity, refrigerant, or the reversing valve. A capacitor holds a charge even with the power off, and it can light you up. Refrigerant requires an EPA license to handle legally, and doing it wrong destroys the compressor. A reversing valve replacement needs a torch, a vacuum pump, and the skills to braze copper without burning your house down. We’ve fixed more than a few DIY attempts in Marietta where the homeowner saved $50 on a part and spent $400 fixing the aftermath.

Straight answer, written price, done right. That’s how we do it. If your Lennox heat pump is acting up, call us at (229) 514-0545 and we’ll tell you what it likely is, what it will cost, and when we can be there.

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