Lennox Heat Pump Service Nationwide

Lennox Heat Pump Service: The Alpharetta Owner’s Guide

We service Lennox heat pumps throughout Alpharetta, including the Windward neighborhood, Crabapple, and Milton, with most repairs completed the same day we arrive. A typical Lennox heat pump service call in Alpharetta runs $150 – $650 depending on what failed, and we carry the most common Lennox replacement parts on the truck so we’re not chasing parts across town while your house warms up. You’ll usually know something’s wrong when the outdoor unit runs constantly but the air coming from your vents feels weak or lukewarm, or when the system short-cycles on and off through the afternoon heat.

Call (478) 606-5046

Luis Serrano has worked on Lennox heat pumps in Georgia’s humidity long enough to know that what fails in Alpharetta isn’t always what fails in drier climates. We’ll tell you exactly what we found, what it costs, and what’s worth replacing before we touch anything.

Which Lennox Models This Applies To

Lennox makes a wide range of heat pump lines, and the part that fits an entry-level 13ACX won’t necessarily fit an XP25 or SL25XP variable-speed unit. The good news: Lennox labels their outdoor units clearly. You’ll find the model number on a rating plate attached to the back or side of the outdoor cabinet, usually starting with “XP” for heat pumps, like XP14, XP16, XP21, or SL25XP.

Here’s a specificity that matters in Alpharetta: Lennox has changed control board and defrost sensor designs between generations, even within the same series. A 2018 XP16 defrost control board is not interchangeable with a 2022 XP16 board in many cases. We verify the exact OEM part number against the serial number before ordering anything. For homeowners weighing OEM versus quality aftermarket, we carry both. OEM Lennox parts carry the full manufacturer warranty and are our default recommendation for boards, sensors, and reversing valves. For contactors, capacitors, and fan motors, we often use high-quality aftermarket equivalents from suppliers we’ve vetted over years of Georgia heat and humidity, because the OEM markup on wear items doesn’t always buy you more life.

One thing we’ll say plainly: Meadowsweet Heating and Air Alpharetta is an independent service provider, not a Lennox dealer or affiliate. That means we’re free to tell you when an aftermarket part genuinely saves you money without sacrificing reliability, and when it doesn’t. We stock parts for Carrier and Trane systems as well, so if you’ve got a mixed-brand house we can handle everything on one visit.

Signs Your Lennox Heat Pump Service Is Failing

• Outdoor unit runs but delivers lukewarm air inside. This usually means the reversing valve isn’t shifting properly, or the system is low on refrigerant due to a slow leak in the coil. In Alpharetta’s August humidity, a heat pump that can’t switch modes becomes a problem within hours, not days.
• The system short-cycles, shutting off every few minutes. A failing capacitor or a control board sending false pressure readings can cause this. Short-cycling wears out the compressor faster than anything else, so we like to catch this early.
• The outdoor unit is frozen over, even in summer. A stuck defrost sensor or failed defrost control board will let ice build up on the coil. Left alone, the ice bends coil fins and eventually takes out the compressor.
• You hear a hard start or loud buzzing before the fan kicks on. That’s typically a failing capacitor or a contactor with burned contacts. Both are inexpensive parts compared to what happens if the compressor tries to start without them.
• Your energy bill jumped 30% with no change in usage. A heat pump running with a failing fan motor, a drifting thermistor, or low refrigerant works harder to move the same heat. We’ve seen Alpharetta bills go from $180 to $290 in one month from a single failing part.

Replacement Cost & What’s Included

Our Lennox heat pump service repairs in Alpharetta fall within $150 – $650 installed, depending on the part. Here’s how that breaks down:

• A dual-run capacitor replacement, the single most common failure we see in Alpharetta’s heat, runs $150 – $250 installed.
• A contactor replacement runs $180 – $300 installed.
• A defrost control board or defrost sensor runs $250 – $450 installed, depending on the model and whether the part is in stock locally.
• A reversing valve replacement, which involves recovering and recharging refrigerant, runs $500 – $650 installed.
• A compressor replacement, when the compressor itself is the problem, falls outside this page’s repair range and we’ll give you a written quote before any work begins.

Every price includes the part, the labor, the refrigerant if the system has to be opened, and our written guarantee on the work. We hand you the price before we open the unit, so there’s no surprise line item when the job’s done. And if the repair doesn’t hold, the 365-Day Done Right Promise means we come back and make it right without a debate.

DIY or Call Us?

You can safely check a few things on a Lennox heat pump before calling us. Make sure the thermostat is set correctly and the air filter isn’t clogged, since a blocked filter can mimic several symptoms on this list. You can also look at the outdoor unit to see if ice has built up on the coil, or if debris is blocking airflow. Write down your model and serial number so you can give it to us on the phone.

But here’s the honest line: heat pumps contain high-voltage capacitors, pressurized refrigerant, and a reversing valve that requires welding and recovery equipment to service. A capacitor holds enough charge to seriously hurt you even with the power off, and a refrigerant leak released improperly is both illegal and dangerous. If the problem is anything beyond a filter, thermostat setting, or visible debris, call us at (478) 606-5046. We’ll walk you through what we think is happening on the phone, and we’ll send a background-checked technician who will leave your floors as clean as we found them.

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