HVAC · Austin, TX
AC & Heating Repair That Keeps Austin Comfortable
Fast AC repair, honest tune-ups, and system replacements built for Texas summers. Upfront pricing, straight recommendations, and same-day service when the heat won't wait.
What we handle
HVAC services we do every day
AC and furnace repair, tune-ups, and installs to keep Austin homes comfortable year-round.
Free replacement quotes and upfront repair pricing — no surprise add-ons.
- AC repair & diagnostics
- Heating & furnace repair
- System replacements & installs
- Seasonal tune-ups & maintenance
- Capacitor & compressor repairs
- Smart thermostat upgrades
- Ductwork & airflow fixes
- Refrigerant leak repair
Why Keystone
Why choose Keystone for hvac
We fix before we sell
If a repair makes sense, we'll say so. You'll never get pushed into a new system you don't need.
Stocked trucks, same-day fixes
Common parts ride with us, so most AC repairs are done in a single visit.
Built for Texas heat
We size and tune systems for real Austin summers, not a spec sheet.
Upfront, guaranteed
Flat-rate pricing you approve first, and a workmanship guarantee on every job.
Recent work
HVAC projects around Austin
How it works
Our hvac process
- 1
Tell us the symptoms
Warm air, strange noises, or a system that won't start — we'll come ready.
- 2
Diagnose honestly
We pinpoint the issue and lay out your options, including repair vs. replace.
- 3
Fix & verify
We complete the work and confirm your system is cooling or heating properly.
- 4
Back it up
Upfront price, clean work, and a written guarantee.
Reviews
What Austin says about our hvac work
“AC died during a 102° week with a newborn at home. They diagnosed a failed capacitor, had the part on the truck, and had us cool again the same day. No upsell.”
“Got three quotes — Keystone was the only one that didn't try to scare me into the biggest unit. Honest sizing, clean install, comfortable house.”
FAQ
HVAC questions, answered
Still have a question? We're happy to talk it through — no pressure.
(512) 555-0148My AC isn't cooling — what's wrong?
It's often a failed capacitor, low refrigerant, a clogged filter, or a tripped breaker. We diagnose the exact cause and give you an upfront price to fix it — frequently the same day.
Should I repair or replace my system?
We'll give you the honest math: the age of the unit, the cost of the repair, and efficiency. If a repair gets you several more good years, that's what we'll recommend.
How often should I get a tune-up?
Once a year for cooling (spring) is ideal in Central Texas, plus a heating check in the fall. Regular tune-ups catch small issues before a July breakdown.
Do you offer emergency AC service?
Yes — no-cooling calls during a heat wave are a priority and we offer 24/7 emergency response across the Austin area.
Are estimates free?
Quotes for repairs and replacements are free and upfront. We'll explain any diagnostic fee before we begin.
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Get your hvac project quoted today
Licensed, bonded & insured — serving Austin and the surrounding area.