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 estimateHVAC Company in San Marcos, TX
San Marcos puts a heavier load on residential HVAC than most Central Texas towns. You get the same triple-digit summer heat as Austin, plus higher humidity off the river, plus hard water and fast growth that left a lot of homes with undersized equipment and ductwork. Most repair calls in San Marcos come down to two things: coils corroding early and condensate drains backing up. If your system is struggling, call (361) 326-1553 and you’ll get a written price before any work starts.
Why San Marcos Homes Are Different
San Marcos sits right at the meeting point of the Balcones Escarpment and the Edwards Aquifer recharge zone, which creates a climate profile you don’t see in nearby towns. Summers routinely push past 100°F, but the bigger issue is the short, intense rainfall bursts. Older systems with marginal drainage get overwhelmed fast, and that standing moisture becomes microbial growth on coils in a matter of weeks, not months.
The housing stock makes it more complicated. Around Texas State University, you’ll find pre-1960 frame homes and pier-and-beam cottages where central air was retrofitted decades after the house was built. Those systems often pull return air from a single hallway and push supply through ductwork baked by attic heat, losing 20-30% of rated capacity by July. Out east and south, the 1990s and 2000s tract homes on slab foundations have their own issues, mostly undersized returns and equipment that was sized for the floor plan without accounting for how many people actually live there now.
Hard water from the aquifer shortens coil life noticeably. We see evaporator coils in San Marcos fail three to five years earlier than the same units in softer-water areas. That’s not a sales line; it’s a chemistry problem we work around with maintenance that specifically targets drainage and coil condition.
Styles & brands we work with
Our Main San Marcos Services
Three jobs account for the large majority of the calls we run in San Marcos: getting a failed AC back online, getting heat working on the genuinely cold nights, and keeping equipment alive longer through the humidity and hard water. Each service has its own San Marcos page with full pricing and detail.
AC Repair in San Marcos
When a San Marcos AC goes down in July, it’s not a comfort issue, it’s a safety issue for older residents and young kids. Common San Marcos failures we see are refrigerant leaks at braze joints, failed capacitors from heat cycling, and condensate drain clogs from the fast rainfall and hard-water scale. We show up with common parts on the truck and give you a written price before touching anything. Full detail on AC Repair in San Marcos.
Furnace Repair in San Marcos
San Marcos winters are mild, but when a cold front drops temperatures into the 20s, your furnace has to work. The most common issues we find are igniters that crack after years of cycling, flame sensors caked with soot, and control boards worn out by our humid shoulder seasons. Every repair includes a written guarantee. Furnace Repair in San Marcos.
AC Maintenance in San Marcos
In San Marcos, maintenance does more than prevent breakdowns. It clears hard-water scale from the drain line, pulls microbial buildup off the coil, and checks that the system is actually moving the amount of air it should be. For older retrofit homes near the university, this is the difference between a system that limps through summer and one that makes it five more years. See AC Maintenance in San Marcos.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Marcos
We service all major residential equipment, with the most common in San Marcos being Trane, Lennox, Goodman, and Rheem. Our technicians carry common capacitors, contactors, igniters, and drain components stocked for those brands, so many repairs finish same-day. See our brands for the full list.
See the difference
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Here are the ranges we typically see for San Marcos HVAC work. These are real market numbers, not vague estimates. The final price depends on your equipment and what’s actually wrong, but you’ll always get a written price before any work starts.
| Service | Typical range in San Marcos |
|---|---|
| AC Repair | $150 – $650 |
| Furnace Repair | $150 – $700 |
| AC Installation | $3,500 – $7,500 |
| Tune-Up / Maintenance | $80 – $200 |
| Capacitor replacement | $150 – $300 |
| Condensate drain clearing | $150 – $300 |
| Refrigerant leak repair | $250 – $650 |
| Furnace ignitor replacement | $150 – $300 |
| Flame sensor cleaning/replacement | $150 – $300 |
| Coil cleaning (evaporator) | $150 – $300 |
What pushes a San Marcos job toward the top of these ranges is usually hard-water scale on coils, significant duct leakage in older retrofit homes, or refrigerant that needs a full evacuation and recharge rather than a simple top-off. Those are done right or not at all. You won’t get a surprise surcharge: the written price you approve is the price you pay.
Neighborhoods We Serve in San Marcos
We run calls all over San Marcos, from the older university-adjacent streets to the newer subdivisions on the east and south sides. Response time across the city is generally same-day when you call before early afternoon, and our trucks stage from the Austin office, so we can usually have someone to most San Marcos neighborhoods quickly.
- Downtown and university area older frame homes
- Willow Creek
- Hills of Hays
- Indian Hills
- La Cima
Service Area – Cities Near San Marcos
While this page is focused on San Marcos, our service area extends to nearby cities across Central Texas. If you’re just outside San Marcos, we may still cover your location. Nearby areas include Austin, TX, Bastrop, TX, Cedar Park, TX, and Hutto, TX. Call (361) 326-1553 to confirm coverage for your address.
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 HVAC Company in San Marcos
In most cases, same-day. Calls we receive before early afternoon typically get a technician out the same day, and we answer the phone live 24/7. If it’s an emergency, call (361) 326-1553 and we’ll tell you honestly when someone can be there.
For full system replacements, yes, the City of San Marcos requires permits and inspections. Our team handles the paperwork for any job that needs it. Repairs and maintenance don’t typically require permits, but we’ll tell you upfront if your job does.
Yes, and noticeably. The mineral content in San Marcos water accelerates scale buildup on evaporator coils and in the condensate drain line, which leads to clogged drains, reduced efficiency, and earlier coil failure compared to softer-water cities. Regular maintenance that specifically addresses drainage and coil condition is worth more here than in most places.
Need an HVAC technician you can trust in San Marcos? Call (361) 326-1553. You’ll get a live person, a written price before any work starts, and a technician whose name and photo you’ll know before the doorbell ever rings.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Marcos Customers Say
"Good work on the heat pump. The first visit missed the real problem, but he came back and found the reversing valve issue. No charge for the return trip."
- Priscilla N."Furnace short cycled all winter. He found a dirty flame sensor and cleaned it. Twenty minutes and a small bill."
- George Q."Annual tune-up on the furnace. He cleaned the burners, tested the heat exchanger, and told me what was fine and what to watch. No scare tactics."
- Lorraine E.