Commercial HVAC Repair in Austin, TX
When a unit quits in the middle of a Texas afternoon, you need a technician who diagnoses the actual fault instead of swapping parts until something works. 512 Mechanical repairs commercial HVAC across the Austin metro, with the readings documented and the invoice itemized.
Repairs on the equipment your building actually runs
Commercial HVAC is not scaled-up residential work. A packaged rooftop unit serving a 40,000 square foot office has economizers, staged compressors, VFD-driven fans and a controls layer that a residential technician has never touched. Diagnosing it properly means understanding the sequence of operations, not just reading a fault code off a display.
512 Mechanical works commercial and industrial equipment exclusively. Our technicians arrive with gauges, meters, a laptop for the controls, and a truck stocked for the equipment classes common in Central Texas. Most repairs get resolved on the first visit; when a part has to be ordered, you get a firm answer on what it is, what it costs and when it lands.
Every repair call ends the same way: photographs of what we found, the actual readings we took, and a written explanation of what failed and why. If the failure points at a larger problem — an undersized unit, a controls issue, a maintenance gap — we tell you that too, with the numbers behind it.
Commercial systems we work on every week
If it heats, cools or moves air in a commercial building in Central Texas, we service it.
- Packaged rooftop units (RTUs), gas/electric and heat pump
- Split systems and ductless mini-splits
- Variable refrigerant flow (VRF) systems
- Air handling units and fan coil units
- VAV boxes, reheat coils and zone controls
- Computer room and server closet units (CRAC/CRAH)
- Make-up air units and exhaust fans
- Condensers, evaporator coils and TXVs
- Scroll and reciprocating compressors
- Economizers, dampers and actuators
- Thermostats, sensors and control boards
- Condensate pumps and drain systems
What happens when you call us
You reach a person
Not a queue and not an answering service. We take the building address, the equipment, and what it is doing, then tell you honestly when a truck can be there.
We diagnose before we quote
The technician takes readings across the system, not just at the failed component. Guessing is expensive for both of us.
You approve the repair
You get the finding, the fix, and the price before work starts. Quoted work stays quoted; time and material is itemized line by line.
You get the documentation
Photos, readings and a written condition report, so you have a record to hand to ownership instead of a scribbled work order.
When a repair stops making sense
Texas heat is brutal on commercial equipment. A rooftop unit rated for fifteen to twenty years often runs hard enough here to age faster than the nameplate suggests, and the last few years of that life get expensive.
We will tell you plainly when you are past the point of repair being the right call. The signals we look at are the age of the unit against its expected service life, the cost of this repair against replacement, whether the refrigerant is still readily available, how many service calls the unit has generated in the last two seasons, and what it is costing you in energy compared to a current-efficiency machine.
When replacement is the answer, we handle it end to end — equipment selection, crane and rigging coordination, curb adapters, electrical coordination, startup and commissioning. See rooftop unit service and change-outs for how that work runs.
Serving the Austin metro and Central Texas
Repair crews dispatch from northwest Austin and cover the metro. Emergencies get same-day dispatch; routine service is scheduled.
Frequently asked questions
How fast can you get a technician out?
True emergencies — a building down, product or a process at risk — get immediate dispatch, same day. Routine service calls are scheduled into the queue rather than same-day, typically within a day or two depending on how booked the crews are and how far out you are. Preventive maintenance agreement customers move ahead of non-contract calls, which is one of the practical reasons an agreement is worth having.
Do you work on brands you did not install?
Yes. We service nearly every major commercial brand — Trane, Carrier, York, Daikin, Lennox, AAON, Rheem, Goodman and others. We do not require that we installed the equipment, and we do not charge more because someone else did.
What does a commercial HVAC repair cost in Austin?
It depends entirely on the equipment and the failure. A contactor or capacitor replacement is a few hundred dollars; a compressor change-out on a large rooftop unit runs into the thousands. What we will commit to is that you get the diagnosis and the price before any repair work starts, and that quoted work stays at the quoted number.
Do you offer after-hours commercial HVAC repair?
Yes, 24 hours a day, seven days a week, including holidays. See emergency commercial HVAC service for how after-hours dispatch works.
Let's get your building running right
Tell us what is going on and we will get a technician or an estimator on it. For anything urgent, call — that is always the fastest path.
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24/7 Dispatch(512) 316-9646
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Office12108 Roxie Dr Suite D
Austin, TX 78729 -
HoursMon–Fri 8:00a–5:00p
Emergency service 24/7/365
Request service or a quote
Equipment down right now?
Emergency commercial HVAC and chiller response across Austin and Central Texas — nights, weekends and holidays.