Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterLennox HVAC in San Antonio, CA | Dalton Heating & Air
We’re an independent Lennox service provider serving our San Antonio service area, and we fix these systems without the authorization markup or manufacturer runaround. What makes our Lennox work different here is simple: we know which specific models struggle with San Antonio’s hard water and attic heat, and we stock the parts to fix them fast. Marco Benitez and the Dalton Heating & Air crew have worked on Lennox equipment for over a decade, from Dave Lennox Signature units to entry-level Merit condensers. Call (361) 306-9515 for a free estimate, and we’ll have a background-checked tech at your door inside the stated window.
Why San Antonio Residents Choose Us for Lennox Service
Marco Benitez learned HVAC at Los Angeles Trade-Technical College, where the hands-on lab work covered refrigerant systems, ductwork, and load calculations, the math behind sizing equipment to a house instead of just swapping whatever was there before. He’s been diagnosing no-cool calls across the LA Basin for over twenty years, and he brings that same approach to every Lennox job in San Antonio. We don’t guess, and we don’t upsell a replacement when a capacitor swap will do.
Dalton Heating & Air is a Garrison Partners company, operating under The Garrison Standard since 2003. That means the price goes in writing before any work starts, every repair carries a written guarantee, and if the repair fails within the warranty period, we return at no charge. We service all nine major residential HVAC brands, but our Lennox familiarity runs deep because these units show up constantly across San Antonio’s housing stock. If you need Lennox sales & service, you want someone who knows the difference between an ML14XC1 and an SL28XCV without checking a manual.
Common Lennox HVAC Problems We Solve in San Antonio
- Frozen evaporator coils on Merit and Elite units. San Antonio’s humid summers mean return air carries a lot of moisture. When filters clog or return plenums are undersized, airflow drops and the coil ices over. We thaw it, fix the airflow issue, and confirm refrigerant charge before we leave.
- Failed run capacitors on XC and SL series condensers. Attic heat regularly climbs past 100°F in San Antonio. After five to seven years of that, capacitors swell and fail. We keep OEM-spec replacements on the truck for same-day repair.
- Cracked heat exchangers in G60 and G71 furnaces. San Antonio gets occasional hard freezes that force furnaces to cycle hard, and neglected units crack at the welds. This is a safety issue, not a comfort nuisance, and we always check the exchanger before we quote any furnace repair.
- Clogged condensate traps and drain lines on high-efficiency units. Cedar and oak pollen blow through San Antonio most of the year, and that airborne dust settles in drain pans. When the trap clogs, the unit shuts down on a float switch fault that looks electrical but isn’t.
- Scale buildup on condensate pumps and float switches. This one is distinctly San Antonio. Hard water leaves mineral deposits that make pumps stick and switches read false. We flush and descale these on every Lennox repair visit, which prevents the intermittent shutdowns that mimic electrical faults.
Lennox Service in San Antonio: What Local Conditions Mean for Your Equipment
San Antonio’s water is hard, harder than most Texas cities, and that reality shows up inside Lennox condensate pumps and float switches. The minerals in the water precipitate out as scale, coating the pump impeller and the float mechanism. The result is a system that shuts down randomly, sometimes after the AC has run fine for six hours, and the homeowner assumes a board or wiring fault. We’ve seen this across San Antonio, and it’s rare in softer-water cities nearby. Our techs flush the pump, descale the switch, and test the full condensate path on every repair visit, because skipping that step means a callback in two weeks with the same intermittent shutdown. Hard water doesn’t just shorten the life of the pump, it also reduces heat transfer in the coils over time, which is why regular tune-ups matter more here than in cities with softer supply. When we service a Lennox unit in San Antonio, we check condensate condition as a standard diagnostic, not an add-on.
Our tech got called to a 2008 Lennox Merit series unit in the Stone Oak neighborhood that kept tripping the breaker. We found a swollen run capacitor and a corroded contactor, both common after years of attic heat, and replaced them with OEM-spec parts. The system pulled down to 72°F within an hour and the homeowner avoided a full replacement.
Lennox Models & Products We Service in San Antonio
We work on the full Lennox lineup: the Dave Lennox Signature Collection, including the SL28XCV and SL25XPV variable-capacity condensers; the Elite Series, like the EL18XCV and EL16XC1; the Merit Series, including the ML14XC1 and ML17XP1 heat pump; and the MLA and MPB ductless mini-split lines common in older San Antonio homes without central ductwork.
On parts, we stock OEM Lennox capacitors, ignitors, and control boards when lead time allows. For common wear items, we use high-quality aftermarket equivalents to keep repair costs in check. That means a capacitor replacement doesn’t cost double just because the box says Lennox. For units over twelve years old with a failed compressor or heat exchanger, we give you a repair-versus-replace comparison using flat-rate pricing, so you can make the call with real numbers in front of you.
Lennox Service Pricing in San Antonio
Here’s what San Antonio homeowners can expect to pay for common Lennox work through Dalton Heating & Air. These are flat-rate ranges, not hourly mysteries:
| Service | Price Range |
|---|---|
| AC Repair | $150 – $650 |
| Furnace Repair | $150 – $700 |
| AC Installation | $3500 – $7500 |
| Tune-Up | $80 – $200 |
The final number depends on the part, the model, and how long the repair takes, but the price is in writing before any work starts. That’s The Garrison Standard, and it’s not optional. Call (361) 306-9515 for a free estimate on any Lennox repair in San Antonio.
Serving San Antonio, FL - Our Local Coverage Area
We’re based in the San Antonio 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 San Antonio
My Lennox AC is freezing up, is that a refrigerant leak or something else?
Most frozen Lennox coils in San Antonio AC Repair trace back to airflow, not refrigerant. Dirty filters, undersized return plenums, or closed supply vents starve the coil of warm return air, and ice forms. A refrigerant leak can cause it too, but we check airflow first because it’s cheaper to fix and more common in this climate. Call (361) 306-9515 and we’ll diagnose it same day.
How often should a Lennox furnace in San Antonio be tuned up?
Once a year, ideally in October before the first hard freeze. San Antonio’s freeze cycles stress furnace heat exchangers, and the dry, dusty conditions clog burners faster than coastal cities. A yearly tune-up catches cracked exchangers before they become a carbon monoxide risk.
Can you replace just the capacitor on my Lennox condenser?
Yes, and we do it often. A swollen or failed run capacitor is a common failure on Lennox XC and SL condensers after five to seven years of attic heat. We test the capacitor, confirm the microfarad rating, and install an OEM-spec replacement in under an hour on most calls.
Is a San Antonio Heat Pump Installation worth repairing in San Antonio’s climate?
Usually yes, if the compressor is healthy and the unit is under twelve years old. San Antonio winters are mild enough that heat pumps work efficiently, and a repair in the $150 – $700 range beats a $3500 – $7500 replacement. If the compressor is gone on an older unit, we’ll show you the replacement numbers and let you decide.
Do you service Lennox mini-split systems in older San Antonio homes?
We do. Many San Antonio homes built before central HVAC use MLA and MPB ductless units. We service those the same way we service central systems: diagnose the fault, quote it in writing, and fix it right the first time. Call (361) 306-9515 to schedule.
Service Areas Near San Antonio
We serve San Antonio and the surrounding communities. If you’re in Los Angeles, our team covers Lennox service in Los Angeles as well. For families relocating from the East Coast, we also offer Lennox service in Brooklyn through our network. Since we’re part of a multi-location Garrison Partners network, our San Antonio service area extends to nearby neighborhoods across the region.
Book Your Lennox Service in San Antonio Today
If your Lennox system is down or acting up, call (361) 306-9515. A live person answers 24/7, and we’ll get a background-checked, uniformed technician to your San Antonio home same day when it’s urgent. Tell us what the system is doing and what the house feels like, that’s usually enough to know where to start.
Written by Marco Benitez, Owner & Lead HVAC Technician at Dalton Heating & Air, serving San Antonio since 2003.