AC repair
Furnace & heating
Heat pumps
Ductless mini splits
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Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateLennox HVAC in Richardson, TX
We provide independent Lennox service across Richardson: repair, replacement, heat pump work, and ductless systems, all handled by technicians who see this equipment every week. The difference here isn’t a badge. It’s that we scope Richardson’s attic ductwork before we recommend a new condenser, because in the older TI-era neighborhoods a new unit fighting a dead duct system will fail its first August. We are not affiliated with or authorized by Lennox, and we say so plainly. Call (866) 970-7959 for a free estimate on your Lennox system in Richardson.
Why Richardson Residents Choose Us for Lennox Service
Our crew works on Lennox equipment every week across Richardson’s older ranch homes and the newer two-story builds toward CityLine, from 1990s builder-grade units to current variable-speed systems. That history matters. When a Merit outdoor unit trips and the homeowner has already replaced the capacitor once, we know where to look next instead of starting from zero. We diagnose the problem, not the upsell, and because Sunstone isn’t locked into one manufacturer, our recommendations follow what your equipment actually needs.
Harold Duran leads the work here. He grew up in the Duck Creek neighborhood of Garland, learned the trade at Eastfield College in Mesquite, and spent well over two decades in HVAC before starting Sunstone AC Repair in 2018. Around here he’s known for being straight with people, and his line holds: “If I wouldn’t put it in my own house, I’m not recommending it for yours.” Quality parts that fit your Lennox unit, clear scheduling, and an honest word on repair versus replacement. That’s the whole offer in Richardson.
Styles & brands we work with
- AC repair
- Furnace & heating
- Heat pumps
- Ductless mini splits
- Carrier
- Trane
- Goodman
Common Lennox HVAC Problems We Solve in Richardson
Lennox builds good equipment. The failures we see in Richardson tend to follow the climate and the housing, not the badge on the cabinet.
- Condenser fan motors and dual-run capacitors in Merit and Elite outdoor units wear early under near-continuous July through September runtime. Shaded backyard pads make it worse: leaf debris packs the coil, head pressure climbs, and the motor carries a load it wasn’t built for. Clearing the pad and testing the capacitor takes less time than most homeowners expect.
- Inverter and control-board communication faults on Signature Collection and XC-series variable-speed systems show up after repeated hard freezes. We saw a wave of these after the 2021 Uri event and still find latent board failures and weak crankcase heaters long after the storm. Those systems need someone who reads the fault codes properly rather than swapping boards until the light goes out.
- Matching-coil leaks at the evaporator are common on older Lennox air handlers sitting in 75080 and 75081 attics. Attic heat near 140°F and long cooling cycles age that coil faster than the outdoor unit, and a slow refrigerant loss often looks like a dozen other problems first.
- Ignitor and flame-sensor failures on ML193 and G-series furnaces arrive with the first cold snap. The same furnace that ran fine all summer won’t light after a North Texas humidity season, and the fix is usually small.
- Variable-speed systems short-cycling because the air handler and the condenser aren’t matched to the ductwork feeding them. This one is a Richardson specialty, and it’s the reason we look at ducts before quoting equipment.
Lennox Service in Richardson: What Local Conditions Mean for Your Equipment
Richardson’s HVAC story runs along the Telecom Corridor. Block after block of 1960s and 70s ranch homes off Central Expressway were built for the Texas Instruments-era workforce, and many are now on their second or third owner with the original ductwork still overhead. Those attics routinely hit 140°F in summer, and we regularly find flexible duct collapsed or the inner liner separated from decades of that heat. Here’s why it matters for a Lennox owner: a replacement sized and quoted without evaluating that ductwork will short-cycle and fail its first August no matter how good the condenser is. Mature pecan and oak canopy adds a second Richardson quirk, since shaded condenser pads collect leaf pack and drive head pressure up. We scope the ducts before recommending a new unit, and we look under the tree before we blame the compressor.
Lennox Models & Products We Service in Richardson
We repair, install, and service the kinds of Lennox equipment that show up in Richardson homes: Merit and Elite outdoor units and gas furnaces, Signature Collection variable-speed systems, heat pumps, and ductless systems. We also work on the older builder units still running in TI-era houses. Parts matter here. When a failure is model-specific, we use quality parts that fit your equipment correctly, and for consumables we choose what holds up in this climate. What we won’t do is guess at a part number and hope. One call covers your whole system, cooling and heating, so you’re not hunting a second contractor when the furnace acts up in January. Call (866) 970-7959 to schedule.
See the difference
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AfterLennox Service Pricing in Richardson
What you’ll pay depends on the diagnosis, the parts, and whether ducts are part of the job. These are typical estimated ranges for the Richardson area. The written estimate sets the final price, and the estimate itself is free.
| Service | Typical Estimated Range |
|---|---|
| AC Repair | $150 – $650 |
| AC Replacement | $3500 – $7500 |
| Tune-Up | $80 – $200 |
| Furnace Repair | $150 – $700 |
A failed capacitor on an Elite unit sits at the low end. A compressor or a leaking coil in a 1960s ranch attic pushes toward the top, and that’s often the moment to talk honestly about replacement. A free estimate includes a look at the equipment, the attic, and the ductwork where it’s accessible. Call (866) 970-7959 for yours.
Serving Richardson, TX – Our Local Coverage Area
We serve Richardson and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – Lennox HVAC in Richardson
No. Sunstone AC Repair is an independent service provider, not affiliated with or authorized by Lennox. Our credibility comes from hands-on repair history across Richardson’s housing stock, not a manufacturer badge.
A clogged condenser coil from leaf pack or a weak run capacitor is the usual culprit, and in Richardson a shaded pad under a mature tree makes both more likely. A 1970s ranch off Central Expressway gave us exactly this call: the pad was buried in leaf pack, the capacitor was weak, and the attic flex duct inner liner had separated. We cleared and re-piped the pad, replaced the capacitor, and quoted the duct repair alongside it. Call (866) 970-7959 for an exact quote; estimates are free.
Usually yes, if the ductwork is original and the liner has separated. A new condenser pushing through collapsed flex duct short-cycles and never delivers the comfort you paid for. We scope the ducts first and tell you what we find.
Often it is, or the flame sensor needs cleaning after a humid summer. Both are small repairs, typically at the low end of our $150 – $700 furnace range. Call (866) 970-7959 to get it looked at before the next freeze.
It can, if the crankcase heater and control board are healthy going into winter. The systems that failed in 2021 were often already carrying a weak board or a heater that had quit quietly. A pre-winter check catches that. Call (866) 970-7959 to schedule one.
Yes. We install and service Lennox ductless systems, including in the tighter, newer construction toward CityLine. Call (866) 970-7959 for a free estimate.
Service Areas Near Richardson
Beyond our Richardson work, we serve homeowners in Plano, Garland, Rockwall, Heath, and Fate. Same independent Lennox service, same honest diagnosis. If you’re just outside Richardson, call and we’ll tell you whether you’re in range.
Book Your Lennox Service in Richardson Today
Same-day service is often available for Lennox repairs in Richardson. Call (866) 970-7959 for a free estimate. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Harold Duran, Owner at Sunstone AC Repair, serving Richardson since 2018.