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Get your free estimateLennox HVAC in Schertz, TX | Brandt HVAC Co San Antonio
We provide independent Lennox service across Schertz, and the one thing that sets our Lennox work apart here is that we know exactly what this town’s hard water and attic heat do to these systems. If you own a Lennox in Schertz, you’re dealing with conditions most techs in San Antonio don’t see every day. We’re Brandt HVAC Co San Antonio, and you can reach us at (361) 470-8872. Lennox sales & service is a core part of what we do, and we’ll give you a straight answer on repair versus replacement before any work begins.
Why Schertz Residents Choose Us for Lennox Service
Plenty of HVAC companies in the area will work on a Lennox. Few of them can tell you why a Merit Series coil fails faster in Schertz than it does twelve miles down I-35 in San Antonio. We can. Devin Marlowe, our owner, learned the trade at Los Angeles Trade-Technical College and spent the better part of two decades working on HVAC systems across the Southwest. Schertz has its own set of rules. We’ve been running service calls throughout this area long enough to know that a Lennox XC21 in Schertz Village is going to face a different set of problems than the same unit in Cibolo. That’s practical experience, not a marketing line.
We’re an independent Lennox service provider. We are not manufacturer-affiliated or authorized, and we don’t pretend otherwise. What we bring is repair volume: we’ve seen these units fail in every way Schertz can make them fail, and we’ve fixed them. Every job starts with a written price before any work begins. Every repair includes a written guarantee. And when we send a technician to your door, you’ll know their name and see their photo before they arrive. They’ll show a photo ID badge at the door. That’s the Threshold Verified standard, and it matters if you’re home alone or have kids in the house.
Styles & brands we work with
Common Lennox HVAC Problems We Solve in Schertz
Here’s what we actually find when we open up Lennox equipment in Schertz. These aren’t textbook failures. They’re what this specific town does to these specific units.
- Inverter board failures on XC21 and XC25 units. Schertz attics routinely hit 130°F or more in July and August. Lennox inverter boards sit up there soaking in that heat. After enough 105°F-plus days, the board overheats, throws a communication fault, and the system short-cycles or stops cooling entirely. We keep OEM boards on hand for faster turnaround.
- Formicary corrosion on Merit 13ACX evaporator coils. High attic humidity plus the salt air that drifts up from the Gulf creates formicary corrosion, tiny pinhole leaks in copper coils. We see this constantly in Schertz, especially in 2000s-2010s subdivisions where the coil sits in a hot, humid attic all summer.
- iComfort thermostat communication errors after thunderstorms. Summer storms roll through Schertz regularly, and power surges knock iComfort thermostats offline or scramble their connection to the condenser. Sometimes it’s a simple reset. Other times the surge took out the control board too.
- Stuck reversing valves on Elite heat pumps during cold snaps. Schertz winters are mild until they’re not. When a sudden freeze hits in January, an Elite heat pump with a sticking reversing valve won’t switch to heat mode. The house stays cold exactly when you need the system to work.
- Scale buildup in evaporator coils from Edwards Aquifer hard water. This is the Schertz-specific one. The hard water here accelerates mineral scale inside Lennox coils. Left alone, it reduces efficiency, raises your electric bill, and eventually kills the coil. More on this below.
Lennox Service in Schertz: What Local Conditions Mean for Your Equipment
Schertz sits on the Balcones Escarpment, right where the Blackland Prairie gives way to the Hill Country. That means shallow, rocky soils and temperature swings that work HVAC systems harder than they get worked in San Antonio or New Braunfels. But the thing that really separates Schertz from its neighbors is the water. In older neighborhoods like Schertz Village, the hard water from the Edwards Aquifer accelerates scale buildup in Lennox evaporator coils. That scale insulates the coil, reduces heat transfer, pushes refrigerant pressures up, and shortens the life of the compressor. Regular maintenance and occasional acid washes are a fact of life for keeping Lennox ACs alive here. We’ve pulled coils out of Schertz Village homes that looked like they’d been dipped in limestone. A homeowner in San Antonio might get away with skipping a couple of tune-ups. In Schertz, that’s how you buy a new compressor three years early.
Lennox Models & Products We Service in Schertz
We service the full residential Lennox lineup: the Signature Collection with XC and SL/SLP series variable-capacity units, the Elite Series (EL and XC), and the Merit Series including the 13ACX line. We also work on Lennox heat pumps from every tier. For critical components like control boards and variable-speed motors, we lead with OEM Lennox parts. For simple items like capacitors and contactors, we’ll propose proven aftermarket alternatives when they cost less and do the same job. We stock common Lennox parts locally so Schertz service calls don’t wait on a warehouse in Dallas.
See the difference
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AfterLennox Service Pricing in Schertz
Here’s what Lennox work in Schertz typically runs. These are the numbers we quote on the phone, so you know before we arrive.
| Service | Typical Price Range |
|---|---|
| AC Repair | $150 – $650 |
| Capacitor Replacement | $150 – $350 |
| Refrigerant Recharge (that means refilling the fluid that moves heat out of your home) | $200 – $450 |
| AC Installation | $3500 – $7500 |
| Furnace Tune-Up | $80 – $200 |
What drives the cost? The specific part, how long it takes to access, and whether the failure is a simple swap or a diagnostic chase. Every estimate is free, and you get a written price before any work starts. No exceptions. Call (361) 470-8872 and we’ll walk you through what your Lennox likely needs and what it’ll cost.
Serving Schertz, TX - Our Local Coverage Area
We’re based in the Schertz area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs – Lennox HVAC in Schertz
A Lennox condenser that trips the breaker on 105°F days is usually drawing too much amperage, which happens when the compressor is struggling against high refrigerant pressure from extreme heat, a failing capacitor, or a dirty condenser coil. In Schertz, we also see this when scale buildup in the evaporator coil pushes system pressure up. It’s a sign of strain, not a fluke. Call (361) 470-8872 before the next heat wave and we’ll diagnose it.
No. A heat pump that ices over during a sudden freeze typically has a stuck reversing valve, low refrigerant, or a failed defrost board. Schertz cold snaps hit fast, and if the defrost cycle doesn’t engage, the outdoor coil turns into a block of ice. This needs prompt attention, because running it frozen can damage the compressor. Call (361) 470-8872 and we’ll get it sorted.
Twice a year, minimum. Spring for the AC, fall for the furnace or heat pump. The Edwards Aquifer hard water in Schertz means your evaporator coil is slowly accumulating scale even when the system runs perfectly. A twice-yearly inspection catches scale buildup before it becomes a compressor-killing restriction.
Yes. iComfort connection drops in Schertz are frequently caused by power surges from summer thunderstorms, which can corrupt the thermostat’s communication protocol or damage the control board it talks to. We diagnose the full chain, from thermostat to wiring to board, and repair only what’s actually failed. Give us a call at (361) 470-8872.
At 15 years old, a Merit Series unit with a major failure, a bad compressor or a leaking coil, almost never makes financial sense to repair. You’d be spending $1,500 to $3,000 on a system that’s already past its expected lifespan and running at maybe 60% of its original efficiency. New Lennox systems start around $3,500 installed, and we’ll walk you through the math honestly. Call (361) 470-8872 for a no-pressure assessment.
Service Areas Near Schertz
We run Lennox service calls throughout Schertz and the surrounding Schertz service area, including right up I-35 into San Antonio. If you’re in Cibolo, we handle Lennox service in Cibolo as well. And for homeowners on the north side, we cover Lennox service in San Antonio from downtown up through the Pearl District and beyond. Boerne, Kirby, and Floresville are also in our service footprint.
Book Your Lennox Service in Schertz Today
If your Lennox is acting up, don’t wait for the next triple-digit day. Call (361) 470-8872 for a free estimate on Lennox repair anywhere in Schertz. A live person answers, 24/7. Tell me what’s wrong, I’ll tell you what it costs, and we’ll get your house back to livable.
Written by Devin Marlowe, Owner at Brandt HVAC Co San Antonio, serving Schertz since 2003.