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When the Texas heat pushes your AC to its limit, you need more than a quick patch—you need experts who know our homes’ systems inside and out. At Radiant Plumbing & Air Conditioning, we bring decades of experience to every AC repair, whether it’s troubleshooting an older unit near the historic district or fine-tuning a high-efficiency system in a new development. We understand the strain long summers, humidity, and heavy use put on your cooling system – and we know how to restore comfort fast.
Our licensed technicians don’t just replace parts; they diagnose issues with precision, explain your options clearly, and deliver lasting solutions. With upfront pricing, 24/7 emergency service, and our satisfaction guarantee, Radiant makes it simple to stay cool, confident, and comfortable. From thermostat malfunctions to full system breakdowns, we’ve seen it all—and San Marcos families trust us to get it right the first time.
In San Marcos, your air conditioner works hard through long summers, and your furnace takes its turn when the temperatures drop. With Radiant Care Club, you’ll keep your whole HVAC system running at peak performance year-round. Membership includes seasonal tune-ups for heating and cooling, plus a full plumbing check, so small issues never turn into big, costly surprises.
As a member, you’ll enjoy no dispatch fees, a 10% discount on repairs, and the peace of mind that comes with priority service. From checking refrigerant levels and cleaning coils to testing gas connections and inspecting ductwork, our licensed pros go beyond the basics to keep your home efficient, reliable, and comfortable in every season. Care Club isn’t just maintenance—it’s your ticket to worry-free comfort.
When it comes to AC repair in San Marcos, you deserve more than promises – you deserve protection. At Radiant Plumbing & Air Conditioning, our Home Comfort Guarantee ensures every cooling service is delivered with integrity, precision, and care. From tune-ups and repairs to full system installs, we back our work with clear, written guarantees, including upfront pricing, satisfaction, and installation assurances. If your system doesn’t perform as promised, we’ll make it right. That’s our commitment to keeping San Marcos families cool, comfortable, and confident—no matter how high the Texas heat climbs.
We proudly service the following cities and neighborhoods across San Antonio, TX:
Not seeing your area? Give us a call at 210-294-6703
When your air conditioner falters in San Marcos, every minute counts. Our long, humid cooling season pushes systems hard, from attic air handlers to split systems. Radiant specializes in fast, precise AC repair that restores comfort and keeps energy bills in check. We pair veteran-employed craftsmanship with clear diagnostics, so you know exactly what’s wrong and what it takes to fix it.
San Marcos humidity creates its own challenges: duct sweating, musty rooms, and algae in condensate lines that can trigger ceiling leaks. We tackle the root causes—verifying refrigerant charge, checking blower speeds, clearing condensate drains, and sealing/leak-testing ductwork. Variable speed and two-stage systems get tune profiles that match real-world conditions, not just lab specs. Outdoor units take a beating from storms along the I-35 corridor, so we clean coils, inspect fan motors and capacitors, and recommend hail guards or surge protection where it makes sense.
For light commercial spaces, reliable cooling is business-critical. We service rooftop package units and mini-splits, manage zoning and economizers, and set up proactive maintenance plans that reduce downtime. Whether it’s a no-cool at 4 p.m. or uneven temps between floors, our technicians arrive with stocked trucks and the mindset to fix it right the first time.
Need more than ac repair? Discover some of our other San Marcos service offerings:
Need air conditioning service today? You’ll get transparent pricing, options that respect your budget, and a tech who explains everything clearly. From the Square to Spring Lake, we keep San Marcos cool with integrity, precision, and pride. We Answer the Call.
