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 Antonio, TX
Most San Antonio homeowners pay between $150 and $650 for AC repair, $150 and $700 for furnace repair, and $3,500 to $7,500 for a full AC installation, with same-day service available when your system fails during our brutal summer stretches. Coldharbour Heating & Air dispatches technicians from our San Antonio office to handle the unique demands of IECC Climate Zone 2: sustained triple-digit heat, hard Edwards Aquifer water that scales coils and drain lines within a single season, and aging attic ductwork that turns into a sauna by June. Call (817) 402-2972 and you’ll reach a live person, 24 hours a day, who can get a crew moving.
Why San Antonio Homes Are Different
San Antonio’s climate punishes HVAC equipment harder than anywhere else in Texas. We log over 3,000 cooling degree days annually, with 100+ days above 90°F and stretches above 100°F from June through August that outlast Dallas and Austin. The shoulder season barely exists here; thermostats flip from heat to AC with almost no transition, so compressors and capacitors run seven months straight with minimal rest. That sustained load accelerates wear well beyond what northern Texas contractors typically see.
The Edwards Aquifer compounds the problem. At 300-400+ mg/L calcium carbonate, it’s among the hardest municipal water supplies in the state. Scale builds on evaporator coils and clogs condensate drain lines within a single cooling season. In Houston, techs fight algae; in San Antonio, we fight mineral deposits. Experienced local technicians treat annual drain-line flushing and pan tablets as standard practice, not an upsell.
Housing stock matters too. The Northeast and Southeast Sides and areas around Fort Sam Houston and Lackland AFB are packed with 1950s-1980s slab-on-grade homes, most with original or once-replaced ductwork running through attics that hit 150°F+ in summer. Duct tape fails. Seams leak. Meanwhile, the far Northwest Side and Helotes corridor added large-footprint, high-ceiling construction in the 2000s-2010s that demands careful Manual J sizing. Oversized equipment is common there, and it destroys humidity control when Gulf moisture surges push relative humidity to 70-85% even in mid-summer.
Our Main San Antonio Services
San Antonio homeowners call us most often for cooling emergencies in July and heating failures during our brief but sharp winter cold fronts. Each job type has its own dedicated page with full details.
AC Repair in San Antonio
When your AC quits on a 103°F afternoon in Terrell Hills or the compressor starts clicking at 10 PM in Stone Oak, speed matters. Our technicians carry capacitors, contactors, and refrigerant to handle the most common failure points we see in San Antonio: capacitors cooked by sustained summer run times, compressors strained by hard-start conditions after winter idle, and low refrigerant from leaks at vibration-worn copper lines. We also clear scale-blocked condensate drains on every summer call, because leaving that untreated guarantees a callback. AC Repair in San Antonio
Furnace Repair in San Antonio
Our heating season is short but can turn severe when Arctic air drops through. Igniter failures, limit switch trips, and blower motor issues are the usual culprits in San Antonio’s gas furnaces and heat pumps. Many systems here sit idle for eight months, then get slammed with continuous runtime during a three-day freeze. We check heat exchangers for cracks, verify gas pressure, and test safety controls before signing off. Every repair leaves with a written 365-Day Done Right Promise. Furnace Repair in San Antonio
AC Installation in San Antonio
New system sizing in San Antonio requires accounting for both extreme sensible heat and latent load from humidity spikes. We run Manual J load calculations using actual roof color, window orientation, and duct leakage measurements, not rule-of-thumb square footage. Oversizing is epidemic in newer Northwest Side homes and it ruins comfort; undersizing in older homes with leaky ducts burns out compressors. We specify equipment with adequate dehumidification capacity and verify airflow after installation. AC Installation in San Antonio
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 Antonio
Our trucks stock common parts for Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard systems. We also service our brands beyond that list. Most repairs in San Antonio neighborhoods like Alamo Heights or Live Oak don’t require a parts order, so we finish same day.
Pricing for HVAC Company in San Antonio, TX
| Service | Typical range in San Antonio |
|---|---|
| AC Repair | $150-$650 |
| Furnace Repair | $150-$700 |
| AC Installation | $3,500-$7,500 |
| Tune-Up | $80-$200 |
What pushes San Antonio prices toward the high end: hard-water scale requiring coil cleaning or drain line replacement, attic ductwork repairs in 150°F conditions, and after-hours calls during peak summer demand. What keeps them lower: straightforward capacitor or contactor swaps on accessible equipment. Either way, we hand you a written price before any work begins. That number does not change at the door.
Neighborhoods We Serve in San Antonio
Our San Antonio office dispatches crews across the metro, from the historic core to the outer loops. Most calls reach a technician within the promised arrival window, typically same day for repairs.
- Alamo Heights
- Stone Oak
- Terrell Hills
- Live Oak
- Helotes
Service Area – Cities Near San Antonio
We regularly cross the Bexar County line for homeowners in Converse, TX, Universal City, TX, Schertz, TX, and Helotes, TX. Scheduling and routing are coordinated from our San Antonio office to keep response times tight across the full service area.
Serving San Antonio, TX - 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 About HVAC Company in San Antonio
Most repair calls in San Antonio proper are scheduled same day, with emergency availability when your system fails during extreme heat. Our phones are answered by a live person 24/7, so you’ll know your arrival window before you hang up. Call (817) 402-2972 to check today’s availability.
AC installation and furnace replacement require permits from the City of San Antonio Development Services Department. We handle permit paperwork as part of the job, including inspections, so you don’t need to visit city offices yourself. Repairs typically do not require permitting.
Some San Antonio neighborhoods, particularly in master-planned communities on the Northwest Side, require HOA notification for outdoor unit placement or fence-line work. We coordinate with your HOA’s architectural guidelines when installing new equipment, and we can provide the equipment specification sheets they usually require.
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 Antonio Customers Say
"Furnace was short cycling all winter. They diagnosed a bad sensor instead of condemning the whole unit like I feared. Cheap fix, honest call."
- Russ Tiedemann"Thermostat and a weak blower. Fixed both in one visit, explained the guarantee, and didn't leave a mess. I've already recommended them to my neighbor."
- Natalie Esposito"Honest to a fault. Two companies told me I needed a whole new unit. Coldharbour said mine had years left and just needed a cleaning and a part. Saved me thousands."
- Marcus Reilly