If it can be fixed, we’ll fix it
Licensed Air Conditioning Contractor in San Antonio
A good air conditioning contractor in San Antonio shows up fast, tests the system, and tells you what’s actually wrong.
Cooling Services Our Crews Handle Year-Round
We take pictures because doing things right means something
When we say we’re nothing like other companies, we mean it
From the moment you call to the moment we’re cleaning up, we’ll treat you like family because doing the right thing is why we’ve been growing for 15 years, and we’re just getting started.
Year-round comfort you can afford
Good
$29 / month
Better
$199 / semi-annually
Best
$399 / year
Did you know?
The summer blockbuster exists because of air conditioning. In the 1920s, movie theaters were some of the only cooled buildings in town. Families that couldn’t cool a house bought tickets instead, and Hollywood started saving its biggest films for July.
Questions & Answers
Ice on the coil or the copper line means airflow or refrigerant is off. A dirty filter, a crushed or leaking return duct, and a weak blower motor all starve the coil of warm air until it ices over. Low refrigerant from a leak does the same thing. Shut the system off, run the fan to thaw it, and get the cause found, because running a frozen system can kill the compressor. In a San Antonio attic in July, a restricted duct turns into a frozen coil fast.
Hard starts, breaker trips, warm air with the outdoor fan still spinning, and a loud hum or clatter at the condenser all point at the compressor. San Antonio systems wear compressors early because our summers keep them running far more hours than the rating assumes. A tech checks amp draw, capacitor health, and refrigerant pressures before calling it. Absolute Zero looks at the whole system first, since a failed capacitor or contactor can look like a dead compressor.
Four things decide it: the age of the system, the refrigerant it uses, how many repairs it has had lately, and the efficiency gap between what you have and what’s sold now. A six-year-old unit with a bad capacitor is an easy repair. A 14-year-old R-22 system with a leaking coil is money spent on a machine that’s already done. San Antonio equipment ages faster than the label suggests, so age 12 and up deserves the honest conversation. Absolute Zero lays out both options with no pressure either way.
Yes. Under the federal AIM Act phasedown, the industry moved off R-410A in 2025, and new residential systems now ship with A2L refrigerants, mainly R-454B and R-32. Your R-410A system is still legal to run and still repairable, since R-410A remains available for service work. What changed is the repair versus replace math, because a new system won’t accept the old refrigerant and replacement equipment costs more than it used to. On a system past 12 years facing a big failure, that shift is worth weighing before you spend on the repair.
Refrigerant leak repairs price out on where the leak is, how much refrigerant the system holds, which refrigerant it uses, and whether the leaking part is still under warranty. A loose fitting at the service valve is a quick fix. A pinhole in an evaporator coil buried in a San Antonio attic means pulling the coil, and older R-22 systems cost more to charge because that refrigerant is scarce now. Absolute Zero finds the leak before adding refrigerant, since topping off a leaking system just pays for gas that leaves again.
A breaker that trips on a cooling cycle usually means the compressor is drawing too much current, the capacitor is weak, or the condenser fan motor is failing. Dirty condenser coils raise head pressure and amp draw, which happens fast on the northwest side of San Antonio where dust and grass clippings collect on outdoor units. Reset it once. If it trips again, leave it off and call, because repeat resets damage compressor windings.
Most San Antonio AC repairs finish in one visit, often inside one to two hours once the problem is found. Capacitors, contactors, fan motors, and drain clogs are same-visit fixes. Coil replacements, compressor swaps, and anything needing a special-order part can run a day or more depending on parts availability. Absolute Zero runs two crews, so a second tech gets pulled in when a job needs four hands.
Short cycling comes from an oversized system, a dirty filter, a failing capacitor, a poorly placed thermostat, or low refrigerant tripping a safety switch. Oversized units are common in San Antonio because bigger got sold as better for years, and they cool the air fast without pulling humidity out. The house feels clammy at 74 degrees and the compressor wears out early. A tech should confirm the tonnage matches the home before anyone touches the equipment.
Sizing comes from a load calculation on the actual house. Ceiling height, window area and direction, insulation levels, duct condition, and how much ductwork sits up in the attic all move the number. A 1980s Braun Station home with original ducts and mature oak shade needs different tonnage than a new two-story in one of the newer Helotes subdivisions with the same square footage. Absolute Zero runs that calculation before ordering equipment, because guessing tonnage is how homes end up with short-cycling systems and humidity complaints.
A tune-up is scheduled maintenance on a working system: coil cleaning, drain flush, refrigerant check, electrical readings, and filter service. A repair fixes something that already failed. Most San Antonio breakdowns in July trace back to something a spring tune-up would have caught, like a weak capacitor or a scaling drain line. Skipping the tune-up saves nothing if it becomes an August no-cool call.
Check the thermostat batteries, the breaker, and the filter first, then look for ice on the copper line at the outdoor unit. If the system is frozen, switch it to fan only so the coil can thaw while you wait. Close the blinds on the west side and get the house buttoned up, since San Antonio afternoons heat an unconditioned home quickly. Then call (210) 574-8857, because the phone is staffed day and night through heat waves.
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