Before & After Gallery - Brandt HVAC Co San Antonio

HVAC Before & After in San Antonio, TX

Anyone can tell you they do clean work. We’d rather show you. These before-and-after notes walk through real scenarios we see across San Antonio, from Terrell Hills to Alamo Ranch: systems choked with dust, coils frozen solid, heat that quit on the first cold snap. Each write-up explains what we found, what we did, and what changed for the homeowner. Photos get added here as we document each job, so this page is a running record rather than a polished brochure.

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Recent Transformations

AC Repair: Frozen Evaporator Coil in a 2016 Carrier System

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The homeowner called us on a July afternoon with an AC running but blowing warm air. When our technician opened the air handler, the evaporator coil was a solid block of ice. That ice usually means one of two things: low refrigerant or weak airflow across the coil. We found a filter that had collapsed into the return plenum, restricting air badly. We corrected the airflow path, thawed the coil with a controlled warm-air process rather than chipping at it, and verified the refrigerant charge before we left. The system dropped the home from 84°F to 74°F in under three hours. That repair is covered in writing for 365 days under the Done Right Promise, and if anything fails in that window, the return visit costs the customer nothing.

Furnace Repair: Failed Igniter in a Lennox Unit off Bandera Road

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This call came in on a January morning when the furnace refused to fire. The blower ran, but the burners never lit. Our tech pulled the igniter and found a hairline crack you could barely see without a flashlight, which is all it takes to kill the ignition sequence. We replaced it with an OEM Lennox igniter rather than a universal knockoff, cleaned the flame sensor while we were in there, and confirmed gas pressure at the manifold. The heat came back on the same visit. Most furnace igniter replacements in San Antonio run $150 to $300, parts and labor included, and this one fell right in that range with the price written down before we touched a tool.

AC Maintenance: A Rheem Condenser Buried in Cottonwood Debris

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San Antonio’s cottonwood season is brutal on outdoor units. This Rheem condenser near the Medical Center had fins so packed with cottonwood fluff and dust that the compressor was working against itself. We checked the amp draw before cleaning: it was running roughly 18% above the unit’s rated load. After a careful fin comb-out, a no-rinse coil cleaner, and a check of the capacitor and contactor, the amp draw came back down to spec. The customer’s power bill will notice the difference before they do. Maintenance visits like this come at a flat price with a written report of what we found and what we did, and our techs don’t work on commission, so there’s no invented upsell when the system is actually healthy.

AC Repair: Compressor Contactor Burn-Out on a Goodman Unit

A homeowner on the northeast side reported their Goodman AC would hum but not start. When we opened the electrical panel, the contactor contacts were pitted black from arcing and one wire’s insulation had started to melt. This is one of the more common failure points on Texas AC systems because the contactor cycles tens of thousands of times in a single cooling season. We replaced the contactor with a rated part, trimmed back and re-terminated the damaged wire, and tested start-up three times while watching the amp draw. The system fired normally and has held since. The written guarantee spells out exactly what we covered and for how long, which is how every repair leaves our shop.

Furnace Repair: Flame Sensor Fouling on a Trane near Stone Oak

This Trane furnace would light for a few seconds, then shut off and restart, over and over. That short-cycling is a classic flame sensor problem: the sensor gets coated in carbon and stops reading the flame, so the board kills the gas as a safety measure. We pulled the sensor, cleaned it with a non-abrasive pad (never sandpaper, which scores the surface and makes it foul faster), and reinstalled it. The burners lit and stayed lit. This kind of repair is usually $100 to $200 all-in, and the customer got the price in writing before we started.

AC Maintenance: Undersized Air Filter Causing Pressure Drop in a Daikin System

A customer near Leon Valley called about weak airflow from a Daikin system that was only four years old. The blower was fine. The problem was a 1-inch filter sitting in a rack built for a 4-inch media filter, leaving a gap at the top where return air was pulling unfiltered dust straight across the coil. We installed the correct 4-inch filter, documented the static pressure drop before and after with a manometer, and showed the customer the numbers. The airflow returned to normal, and the coil no longer has to eat unfiltered air. This is exactly the kind of quiet fix that never shows up in a parts list but changes how a system breathes.

Want Results Like These?

Every job above left with a written price before work started and a written guarantee on the repair. If your system is fighting you, we’ll send a background-checked, uniformed technician whose name and photo you’ll get before they arrive. Call (361) 470-8872 and a live person answers, any hour, any day.

Written by Devin Marlowe, Owner at Brandt HVAC Co San Antonio, serving the San Antonio area. Brandt comes from an old word for a firebrand, which fits the work of keeping a home warm.