AC repair
Furnace & heating
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal 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.
Get your free estimateFast, Reliable AC Maintenance Across San Marcos
AC maintenance in San Marcos runs $80 – $200 for a full tune-up, and it’s the cheapest insurance you’ll buy against a July breakdown. The heat here isn’t abstract: 100°F days arrive by June and linger past Labor Day, and a system that hasn’t been checked since last fall is a system waiting to fail at 4 p.m. on a Friday. Our AC Maintenance team serves San Marcos with same-week scheduling, written pricing before any work starts, and technicians who show up badged, uniformed, and introduced by name before they ever ring your bell. Call (361) 326-1553 for a free estimate.
Why Brandt HVAC Co Austin Is San Marcos’s Preferred AC Maintenance Company
San Marcos homeowners call us because we treat the door like a checkpoint, not an afterthought. Every technician is background-checked and identity-verified under the Threshold Verified standard. That means the person we say is coming is the person who shows up, photo ID in hand, no surprises. For a parent home alone with young kids or an older homeowner who has been burned by a stranger at the door, that certainty matters more than a discount.
We also know San Marcos’s systems. The housing stock here is a mix of pre-1960s frame homes near downtown, Texas State rental properties with retrofitted central air, and 1990s-2010s slab-on-grade tract homes on the east and south sides. Each one fails differently, and our maintenance checklist is built around what we actually find in those homes, not a one-size-fits-none checklist from a manual.
Every job starts with a written price. Every repair includes a written guarantee. And if a repair fails within 365 days, we return at no charge under the 365-Day Done Right Promise. That’s not a marketing line. It’s the terms we hand you in writing before we touch a single screw.
Styles & brands we work with
AC Tune Up in San Marcos
An AC Tune Up in San Marcos means a 20-to-30-point inspection and cleaning of the entire system, from the condenser outside to the evaporator coil, blower motor, and condensate drain inside. It runs $80 – $200 depending on system size and condition. In San Marcos’s heat and humidity, we recommend a tune-up every spring before the first sustained 90°F stretch. The systems that fail in August are almost always the ones nobody looked at in April.
Condenser Cleaning and Pad Check
We wash the outdoor coil, check refrigerant pressures, and verify the pad hasn’t shifted from storm runoff or clay soil movement. San Marcos sits on the Balcones Escarpment, where short, intense downpours routinely flood low-lying yards near the San Marcos River. A condenser sitting even two inches out of level strains the fan motor and chops compressor life. We catch that before it becomes a $2,500 repair.
Drain Line Flush and Float Switch Test
We flush the condensate drain with pressurized water and a mild cleaning agent, then test the float switch that shuts the system down if the pan overflows. The clay-heavy soil sediment common near the river finds its way into drain lines faster than homeowners expect. A clogged drain in a San Marcos July means water backing up into your ceiling. We don’t let it get there.
HVAC Maintenance Service in San Marcos
An HVAC Maintenance Service in San Marcos covers the whole system, not just the AC: we inspect both the cooling side and the furnace or heat strips, test the thermostat calibration, check electrical connections, and measure airflow at the supply registers. It costs $80 – $200 for the tune-up visit, and if we find a worn part like a capacitor or contactor, we show you the price before replacing anything. No work starts until you see the number in writing.
Electrical Inspection and Surge Check
San Marcos’s power grid takes a beating during storm season. Brief outages and brownouts are common, and they fry capacitors and control boards quietly. During maintenance, we check the capacitor’s actual microfarad rating against its label, tighten every lug, and inspect the contactor for pitting. If we find a capacitor reading low, we tell you and quote the replacement on the spot: $150 – $400 is typical, parts and labor included.
Airflow and Duct Assessment
Older San Marcos homes, especially the pier-and-beam cottages around downtown and the university, have ductwork that was undersized on day one and has only gotten worse. We measure static pressure and supply temperature at each vent to find rooms that aren’t getting their share of air. Sometimes the fix is a damper adjustment. Sometimes it’s a recommendation to replace a collapsed flex run. Either way, you’ll know exactly what’s happening in your home.
Trusted Brands We Service in San Marcos
We service all major residential HVAC brands, and in San Marcos we see a lot of Carrier, Trane, Goodman, and Daikin systems, plus plenty of Bryant and American Standard units in newer subdivisions. We stock common capacitors, contactors, blower motors, and drain components locally so a maintenance visit rarely turns into a “wait for the part” saga. If your Goodman condenser has a dead capacitor or your Carrier air handler needs a new blower motor, we usually have it on the truck the same day. Parts are matched to your system’s spec, not whatever happens to be in the van.
See the difference
Before
After
Before
After
Before
AfterCommon AC Maintenance Problems We See in San Marcos Homes
- Flooded condensers switched back on too soon. After a hard San Marcos storm, water and silt from the Balcones Escarpment runoff can submerge a low-lying condenser. If you flip the breaker before it dries, you can short the capacitor or compressor. That turns an $80 tune-up into a $2,500 compressor replacement.
- Surge-damaged capacitors and control boards. Outages and brownouts during storm season stress electrical components. Homeowners sometimes reset the breaker repeatedly until the blower motor burns out. A surge protector and a proper post-storm inspection prevent this.
- Humidity-driven condensate overflow. After heavy rains, outdoor humidity in San Marcos spikes. Condensate pans fill faster, and if the drain line hasn’t been flushed, water backs up. We clean and test every drain line during maintenance for exactly this reason.
- Retrofitted systems losing 20-30% capacity in July. Older homes around Texas State often have central air squeezed into a closet with return air pulled from a single hallway and supply ducts running through a hot attic. By peak summer, these systems lose significant capacity. Our airflow assessment tells you what your system is actually delivering.
Pricing for AC Maintenance in San Marcos, TX
Here’s what AC maintenance in San Marcos actually costs, in writing, before you call:
| Service | Price Range |
|---|---|
| AC Tune Up (full inspection and cleaning) | $80 – $200 |
| AC Repair (capacitor replacement) | $150 – $400 |
What moves a tune-up toward the top of that range? System size, accessibility, and whether it’s a single-stage or variable-speed unit. What doesn’t move it: our mood, the weather, or what we think you can pay. You get a written price before any work starts, every time, no exceptions. Estimates are free. Call (361) 326-1553 and we’ll tell you exactly what a tune-up on your system will cost.
We Also Serve Cities Near San Marcos
Our crews serve San Marcos and the surrounding area, including Austin, Bastrop, Cedar Park, and Hutto. If you own rental property in San Marcos near the university or a home in one of the newer subdivisions on the east side, we’re already familiar with your neighborhood. For the full picture of our service area and what we handle, see San Marcos.
Serving San Marcos, TX - Our Local Coverage Area
We’re based in the San Marcos 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 About AC Maintenance in San Marcos
No. Do not turn it on. Cut power at the disconnect and leave it off until a technician inspects it. Flood water carries silt from the Balcones Escarpment runoff, and that silt shorts capacitors, corrodes terminals, and can destroy a compressor if the unit is powered up wet. In San Marcos, we regularly arrive after storms to find flooded condensers that just need a cleaning, a capacitor replacement, and a dry-out, and we also find condensers that were switched on too soon and now need a $2,500 compressor job. Don’t be the second one. Call (361) 326-1553 before you touch that breaker.
The soil here is the answer. San Marcos sits near the river and the clay-heavy sediment that washes off the Balcones Escarpment finds its way into condensate drain lines faster than in Austin’s limestone-heavy soil. Add the intense, short-duration rainfall this area gets compared to nearby cities, plus post-storm humidity spikes, and the drain line loads up with biofilm and sediment. During maintenance we flush the line, treat it to slow regrowth, and check the float switch. If your line clogs twice a year, we’ll recommend a drain pan treatment and possibly a safety float switch upgrade.
Yes. A 10-year-old AC’s control board and capacitor are not built to absorb the brownouts and brief outages San Marcos gets during storm season. A whole-home surge protector at the electrical panel stops most of the damage before it reaches the AC, and we recommend adding a surge-rated disconnect at the condenser as well. The cost is a fraction of a control board or compressor replacement. We can install and verify the surge protection during a routine maintenance visit.
The short answer is a load calculation, which most older San Marcos rentals never had performed. Many retrofitted systems, especially in the pre-1960s frame homes and small apartments near Texas State, have units that are undersized for the actual heat gain. We measure the conditioned square footage, window area, insulation, and duct condition, then compare it against the system’s rated tonnage. If it’s off, the fix is usually not a bigger unit but better ductwork and airflow. We’ll tell you which, in writing, before you spend anything.
SEER2 is the new efficiency standard that went into effect for ACs manufactured after January 1, 2023. It measures real-world efficiency more accurately than the old SEER rating. If your San Marcos home still runs an R-22 system, refrigerant is no longer manufactured or imported in the US, so the remaining supply is expensive and shrinking. When that system dies, you’re replacing it with a SEER2-rated unit, which will be more efficient but also requires matching indoor and outdoor components. We’ll quote the replacement honestly and handle the paperwork, but plan on $3,500 – $7,500 for a typical San Marcos install, depending on size and ductwork condition.
Questions about your AC? Call (361) 326-1553. A live person answers, 24/7, including during a storm. We’ll schedule a maintenance visit, give you a written price before any work starts, and send a technician you’ll know by name before they arrive.
Written by Devin Marlowe, Owner at Brandt HVAC Co Austin, serving San Marcos with a 365-Day Done Right Promise.