Flat-rate pricing quoted after diagnosis, approved before repair.
From a dead compressor at 6am to a furnace that won't ignite on the coldest night of the year, AAA Pro HVAC treats every call in San Marcos, TX like the emergency it feels like to you.

AAA Pro HVAC didn't start as a franchise rollout or a private-equity roll-up — it started with technicians who got tired of watching homeowners get overcharged for underexplained work.
We service both residential and light commercial systems across San Marcos, TX: split systems, packaged units, ductless mini-splits, gas furnaces, electric furnaces, and heat pumps.
We're not the loudest advertiser in San Marcos, TX, and we're fine with that — most of our San Marcos, TX calls come from repeat customers and referrals, which tells you more about the work than any billboard could.
We carry general liability and workers' compensation coverage on every job in San Marcos, TX, which protects your property and our team equally.
We track every San Marcos, TX job through to a documented completion, which is part of why repeat calls on the same fault are rare. That same standard applies whether the call comes from a single-family home, a rental property, or a small business across San Marcos, TX.

Catching a problem early, before it becomes a total breakdown, almost always means a shorter repair and a smaller bill.
A system that runs but never actually cools usually means a refrigerant charge issue, a failing capacitor, or restricted airflow — not something a thermostat adjustment will fix. Ignoring warm air from the vents rarely makes the underlying issue cheaper to fix later.
A furnace that clicks but never lights, or one that lights and shuts off within seconds, usually points to a failing ignitor, a fouled flame sensor, or a safety switch doing exactly its job. Our San Marcos, TX techs see this specific pattern often enough to diagnose it quickly rather than guess.
Dirty coils, duct leaks, and failing components all show up on the utility bill before they show up as a total breakdown. Our San Marcos, TX techs see this specific pattern often enough to diagnose it quickly rather than guess.
None of these noises are 'normal system sounds' worth ignoring — they're early warnings. Ignoring strange noises: grinding, squealing, banging rarely makes the underlying issue cheaper to fix later.
This is one of the most misdiagnosed HVAC complaints, since it's tempting to blame the thermostat instead of the actual airflow path. Our San Marcos, TX techs see this specific pattern often enough to diagnose it quickly rather than guess.
Short cycling is often caused by a dirty air filter, low refrigerant, or an oversized system, and it gets more expensive to ignore, not less. Ignoring system short-cycling rarely makes the underlying issue cheaper to fix later.
From the first symptom to the final fix, this is what AAA Pro HVAC covers across San Marcos, TX.
We service central air, packaged units, and ductless mini-splits, and we size every new installation with an actual load calculation rather than matching the old unit's tonnage on a guess. SEER2-rated equipment options are explained honestly, with real payback numbers for your specific San Marcos, TX climate, not a generic sales pitch. This is one of the most requested Hvac calls we get across San Marcos, TX.
Every furnace call starts with a combustion analysis and carbon monoxide safety check before any repair recommendation, because a cracked heat exchanger is a safety issue first and a repair line item second. Heat pump-specific diagnostics cover the reversing valve and defrost cycle, components that a generalist unfamiliar with heat pumps can easily misdiagnose. Techs handling heating & furnace services carry the specific parts and tools this job calls for, not a generic kit.
Indoor air quality add-ons including whole-home filtration, UV air treatment, and humidity control are installed and serviced by the same San Marcos, TX crews handling your core system. Mastic sealing, not just tape, on any duct joint we repair, since tape degrades in attic heat within a couple of seasons. Techs handling ductwork & indoor air quality carry the specific parts and tools this job calls for, not a generic kit.
Total no-heat and no-cool failures get priority dispatch across San Marcos, TX, day or night, holiday or not. After-hours pricing is disclosed on the call, before dispatch, so there's no surprise on the invoice. Techs handling emergency hvac service carry the specific parts and tools this job calls for, not a generic kit.
Every maintenance visit follows the same documented multi-point checklist across San Marcos, TX, with actual readings recorded, not just a signed-off form. Filter selection is matched to your specific system rather than a generic one-size recommendation. Techs handling preventive maintenance plans carry the specific parts and tools this job calls for, not a generic kit.
We understand that commercial downtime has a cost beyond comfort, which is why commercial dispatch is scheduled around your business hours, not just first-available. Preventive maintenance agreements for San Marcos, TX property managers and facility teams keep equipment running and budgets predictable. Techs handling commercial hvac service carry the specific parts and tools this job calls for, not a generic kit.

We ask a few diagnostic questions up front so the tech arrives with likely parts already loaded. Our San Marcos, TX dispatch and field teams are trained on this exact sequence so nothing gets skipped under pressure.
We text a confirmed arrival window so you're not waiting around all day for a vague morning-or-afternoon slot. This step matters as much as any other in the Hvac process, and skipping it is usually where things go wrong at other companies.
You approve the flat-rate price before any repair work begins; nothing gets added afterward. Our San Marcos, TX dispatch and field teams are trained on this exact sequence so nothing gets skipped under pressure.
Every repair and installation is backed by a written workmanship guarantee, detailed in your final paperwork. This step matters as much as any other in the Hvac process, and skipping it is usually where things go wrong at other companies.

Every technician dispatched in San Marcos, TX holds required state licensing plus EPA Section 608 certification for refrigerant handling. This isn't a marketing line — it's how every San Marcos, TX call gets handled, from the first ring to the final invoice.
Diagnosis happens first, quote second, repair third — that order never changes, in San Marcos, TX or anywhere else we operate. Ask any San Marcos, TX customer who's had a repeat issue elsewhere fixed correctly here on the first visit.
We stage trucks throughout San Marcos, TX so a technician is rarely more than an hour out on a standard call. This isn't a marketing line — it's how every San Marcos, TX call gets handled, from the first ring to the final invoice.
We diagnose electrical and airflow faults with actual instruments, which is why our repairs tend to hold long-term instead of recurring. Ask any San Marcos, TX customer who's had a repeat issue elsewhere fixed correctly here on the first visit.
Every repair and installation across San Marcos, TX comes with documented guarantee terms, not a verbal promise that's hard to hold anyone to. This isn't a marketing line — it's how every San Marcos, TX call gets handled, from the first ring to the final invoice.
After-hours and emergency rates are disclosed on the phone before a truck is dispatched anywhere in San Marcos, TX. Ask any San Marcos, TX customer who's had a repeat issue elsewhere fixed correctly here on the first visit.

Real feedback from real Hvac calls handled across San Marcos, TX, not cherry-picked marketing copy.
Had the new capacitor in and the system running before I'd even finished my coffee.
System was short-cycling every few minutes and two other companies just wanted to sell me a new unit.
Tech tested the ignitor's resistance right in front of me and swapped it in under thirty minutes.
This crew actually measured the house and explained why our old system was oversized the whole time.
Signed up for the twice-yearly maintenance plan after a bad experience with a surprise breakdown the year before.
They had someone at the door within the hour and didn't blink at the after-hours call.
Turned out to be a slow leak at the schrader valve — they found it with dye, fixed it, and recharged properly.
Turned out a duct joint in the attic had come apart completely — sealed it and the room finally cools properly.

Response time depends on current call volume more than distance, since trucks are staged throughout San Marcos, TX — call dispatch for a live estimate. This is one of the questions our San Marcos, TX dispatch team fields most often.
Yes, an after-hours rate applies and is disclosed on the phone before dispatch — never hidden until the invoice arrives. This is one of the questions our San Marcos, TX dispatch team fields most often.
Yes — the diagnostic charge is credited toward the approved repair, so you're not paying twice for the same visit. Feel free to ask your San Marcos, TX technician directly if anything here needs more detail for your specific situation.
We service all major residential and light commercial HVAC brands, including central air, ductless mini-splits, gas and electric furnaces, and heat pumps. Feel free to ask your San Marcos, TX technician directly if anything here needs more detail for your specific situation.
We'll give you an honest repair-versus-replace comparison so financing is a choice, not a pressure tactic. Feel free to ask your San Marcos, TX technician directly if anything here needs more detail for your specific situation.
Twice yearly is standard — once before cooling season, once before heating season. This is one of the questions our San Marcos, TX dispatch team fields most often.
As a rule of thumb, a repair under a third of replacement cost on a system with years of life left is usually worth making. Feel free to ask your San Marcos, TX technician directly if anything here needs more detail for your specific situation.
Most 'no warning' failures actually had small symptoms beforehand — short cycling, a faint hum, rising bills — that got missed. This is one of the questions our San Marcos, TX dispatch team fields most often.
Mini-splits are often the practical choice for additions or homes where extending ductwork isn't feasible. Feel free to ask your San Marcos, TX technician directly if anything here needs more detail for your specific situation.
That distinction matters for accountability, insurance coverage, and the consistency of the work. This is one of the questions our San Marcos, TX dispatch team fields most often.
If you're near the edge of our service area, call dispatch to confirm before assuming either way. This is one of the questions our San Marcos, TX dispatch team fields most often.
Yes — every repair and installation is backed by a written workmanship guarantee detailed in your final paperwork. This is one of the questions our San Marcos, TX dispatch team fields most often.

Whether you're in a major metro area or a smaller community across San Marcos, TX, dispatch routes the closest available technician to your address. We serve San Marcos and the zip codes around it directly, with trucks positioned to keep response times short. Same-day appointments are available across most of San Marcos on non-emergency calls, and priority dispatch applies to total no-heat or no-cool situations regardless of neighborhood.
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