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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AfterHVAC Company in San Marcos, TX
Dalton Heating & Air is the HVAC company San Marcos homeowners call when a system quits during a Hill Country heat wave or a January cold snap, and they need a crew that actually shows up inside the stated window. Most homes here are electric-dominant, cooling-heavy, and built across a mix of 1980s/90s subdivisions and newer east-side developments, which means our technicians see a lot of heat pumps, older condenser units, and ductwork that hasn’t been touched in 15 years. We put every repair price in writing before work starts, and every repair carries a full-year written guarantee. If you need service today, call (361) 306-9515 and a live person answers, 24/7.
Why San Marcos Homes Are Different
San Marcos has three HVAC realities that change how we approach a job: heat, humidity, and housing age. Temperatures climb into the high 90s for months, and the humidity off the San Marcos River and surrounding Hill Country means an air conditioner or heat pump has to pull moisture out of the air, not just drop the temperature. A system that’s slightly undersized or low on refrigerant will keep a home muggy even when it’s technically running. Older homes along Bishop Street, Craddock Avenue, and in the Blanco River corridor often have original duct runs, undersized returns, and electrical panels that were never meant for modern heat pump loads. Newer construction in Trace, La Cima, and Whisper has tighter envelopes but shorter runtimes, which can leave humidity sitting in the house. We also see plenty of river-area and ranch-road properties where condenser units sit in full sun, collect dust and cottonwood debris, and need coil cleaning more often than the same unit would in a shaded Kyle or Buda subdivision.
Our Main San Marcos Services
Two thirds of the calls we take from San Marcos homeowners are for cooling problems between May and October; the rest split between heat pump replacements and furnace repairs in the cooler months. Each service has its own page with local pricing and the exact job details.
AC Repair in San Marcos
When an air conditioner stops cooling in San Marcos, it’s usually one of a handful of things: a failed capacitor, a refrigerant leak in the evaporator coil, a clogged condensate drain, or a contactor that’s pitted from years of cycling on and off during long Hill Country summers. Our technicians show up with common parts already on the truck, quote the repair in writing before touching a single component, and handle the repair the same day in most cases. Every AC Repair in San Marcos call includes a written one-year guarantee, and if the same problem comes back within that year, we return at no charge.
Heat Pump Installation in San Marcos
San Marcos homes are a natural fit for heat pumps, because a single system handles both cooling and the occasional cold nights we get from December through February. The main difference here versus a generic install is sizing: a heat pump that’s too large will short-cycle and leave the home humid; one that’s too small will run nonstop in August. We quote a complete Heat Pump Installation in San Marcos with the outdoor unit, air handler, lineset, thermostat, and any duct or electrical corrections included in the written price before we order equipment. No same-day promise on installs, because load calculation and equipment selection take a day or so, and we will not cut that corner.
Furnace Repair in San Marcos
San Marcos does not get a hard winter, but when temperatures dip into the 30s, a dead furnace gets uncomfortable fast, and a cracked heat exchanger is a carbon monoxide risk we take seriously. Common furnace problems we see in San Marcos are failed ignitors, dirty flame sensors, and blower motors that wore out after years of pushing air through undersized ductwork. We quote every Furnace Repair in San Marcos in writing before starting, and the repair is guaranteed for a full year. If your furnace is more than 15 years old and the repair exceeds half the cost of a new system, we’ll tell you plainly and give you both options without pressure.
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
Our technicians are factory-trained on Trane, Lennox, Goodman, and Rheem, among the nine brands we carry parts for. On most San Marcos repair calls we arrive with the common capacitors, contactors, and ignitors already stocked on the truck, which keeps turnaround fast. See our brands for the full list.
Pricing for HVAC Company in San Marcos, TX
| Service | Typical range in San Marcos |
|---|---|
| AC capacitor replacement | $150 – $325 |
| AC contactor replacement | $150 – $300 |
| Refrigerant leak repair + recharge | $450 – $650 |
| Condensate drain clearing | $150 – $250 |
| Thermostat replacement | $150 – $350 |
| Furnace ignitor replacement | $150 – $350 |
| Flame sensor cleaning or replacement | $150 – $250 |
| Blower motor replacement | $450 – $700 |
| Heat pump replacement (full system) | $3,500 – $7,500 |
| Seasonal tune-up | $80 – $200 |
What pushes a San Marcos job toward the top of a range is usually access: units crammed into attic crawlspaces in older Craddock Avenue homes, or condensers in flood-prone river bends that need to be raised and re-piped to meet code. Regardless of where the price lands, it goes in writing before any work begins, and the number you approve is the number you pay.
Neighborhoods We Serve in San Marcos
Our crews work across the full San Marcos metro daily, from the newer subdivisions east of I-35 to the older, tree-canopied streets closer to the river and the university. Response times across the area are typically same-day for repair calls placed before early afternoon.
- Trace
- La Cima
- Whisper
- Blanco Vista
- Old San Marcos (Bishop, Craddock, and surrounding streets)
Service Area – Cities Near San Marcos
While this page covers San Marcos itself, our crews also run calls across the northern Hays County corridor. If you’re in Kyle, TX, New Braunfels, TX, Wimberley, TX, or Buda, TX, the same written pricing, one-year repair guarantee, and live-answer phone line apply. Dispatch and scheduling for these routes are coordinated from our Austin metro office; crews serve San Marcos locally.
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
Most San Marcos AC repair calls are handled same-day when placed before early afternoon. Evening and overnight calls go to our 24/7 live-answer line and are dispatched on a priority basis. Call (361) 306-9515 and a person answers, not a voicemail queue.
Yes. The City of San Marcos requires mechanical permits for system replacements and most equipment change-outs. We pull the permit, schedule the inspection, and close it out. The permit fee is included in our written quote, not added as a line-item surprise at the end.
Some do, particularly in the newer master-planned subdivisions on the east and north sides. If your HOA has setback, screening, or noise rules, we’ll work within them and note any constraints on the written estimate before equipment is ordered, so you don’t end up with a violation notice after the install.
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
"Tech arrived in uniform right on time. AC wasn't cooling, found a failed capacitor, and replaced it in twenty minutes. The owner is a veteran and the company runs like it."
- Frank O."Blower motor died on the coldest night. They had the part on the truck and had us warm again the same day."
- Sandy G."Changed the filter size and added a better filter rack. Simple and useful advice."
- Rhonda C.