AC Installation & Replacement

Air Conditioning Installation in Castroville, TX

Local AC Replacement & New Installations for Medina County Homes

A/C Technical Services has been based in Castroville since 1991, with 34 years of residential and commercial HVAC service in South Texas. Every installation we do is backed by Gregg Zinsmeyer’s 52 years of hands-on industry experience. When you’re making a major equipment decision, that depth of local knowledge matters. We know the climate demands here, we know the homes, and we’re not dispatching from across the region.

We handle AC installation and replacement for homeowners throughout Castroville and the surrounding Medina County area. Our team is licensed, insured, and offers free estimates on new installations and full-system replacements.

Ready for a free estimate? Call us at (210) 791-8172 or reach out online. We offer same-day service options and are available 24/7.

Why Castroville Homeowners Choose A/C Technical Services

A new air conditioning system is one of the larger investments a homeowner makes. We’ve built our reputation over three decades by treating it that way. Gregg and Carol Zinsmeyer founded this business on a straightforward commitment: quality workmanship, professional service, and showing up on time.

Here’s what you can count on when you work with us:

Free estimates on installation and replacement with no obligation
Same-day service options when your situation can’t wait
24/7 availability for urgent needs
Warranty-backed service on the work we perform
ABC Contractor Accredited with active membership in local and national industry organizations
Spanish-speaking technicians available (Hablamos Español)
On-time service is a commitment we hold ourselves to, not just a phrase

Signs Your Castroville Home May Need AC Replacement

South Texas summers are long and demanding. A system that’s struggling now may continue to fall behind as temperatures climb. These are the most common signals that replacement may make more sense than another repair.

System age over 10 to 12 years combined with a significant repair need often tips the math toward replacement
Rising energy bills without a change in usage habits can point to a unit losing efficiency
Can’t keep up during peak heat suggests the system may be undersized, worn, or both
Frequent breakdowns or an expired warranty are common replacement triggers
New construction or a home addition where no existing system serves the space
Older equipment that doesn’t meet current SEER2 efficiency standards, which can mean higher monthly costs than a modern replacement would carry

Not sure whether repair or replacement makes more sense? We can assess your current system honestly and give you a clear recommendation.

Schedule Your Free AC Installation Estimate in Castroville

Don’t wait for the next breakdown. Whether you’re replacing an aging system or installing AC in a new space, A/C Technical Services is ready to help. We can come to you, evaluate your home, and give you a straightforward estimate with no pressure.

We’re local, we’re available, and we stand behind our work. Call (210) 791-8172 to schedule your free estimate or to reach us after hours.

What to Expect During a Residential AC Installation

A residential AC installation or replacement isn’t a single step. It’s a sequence of assessments and work that affects how well the system performs over time.

Assessment & System Sizing

A proper installation begins with a review of your home’s square footage, insulation, existing ductwork condition, and layout. Correct system sizing is the foundation of long-term comfort and efficiency in South Texas. An undersized unit runs constantly without reaching the set temperature; an oversized one short-cycles and leaves the home humid. Load calculation, not guesswork, determines the right fit.

Equipment Selection

Once sizing is confirmed, we work with you to identify equipment that matches your home’s needs and efficiency goals. SEER2 ratings measure how efficiently a system cools relative to the energy it uses, and they vary across equipment tiers in ways that affect your long-term operating costs.

Installation & Startup

On installation day, the old equipment is removed, refrigerant is handled according to EPA requirements, and the new system is connected to your existing ductwork or new infrastructure. We then run a startup test covering airflow, refrigerant charge, and thermostat operation before we leave. Residential AC installations in Texas may require a permit and inspection. As a licensed contractor, we handle compliance so you don’t have to track it yourself.

We approach every job with a focus on clean, efficient work, leaving your home undisturbed except for a properly functioning new system.

AC System Types for Castroville Homes

The right system depends on your home’s configuration, whether existing ductwork is in serviceable condition, and your budget and efficiency priorities. Here’s a plain-language overview of the main options.

Central Air Conditioning

Central AC paired with existing ductwork is the most common residential installation type in South Texas homes. If your ductwork is in good condition, replacing the equipment while keeping the distribution system is typically the most cost-effective path for whole-home cooling.

Ductless Mini-Split Systems

Ductless mini-splits are well-suited for home additions, detached structures like garages or workshops, or homes without existing ductwork. We install mini-split systems and can help you determine whether this approach fits your space and goals.

Heat Pumps

Heat pumps provide both cooling and heating from a single system. In Medina County, where winters are mild compared to much of Texas, a heat pump can be an efficient choice for homeowners who want to address both seasons with one installation.

Every home is different. A qualified technician can walk through the tradeoffs with you during your estimate so you’re choosing equipment based on your specific situation, not a general recommendation.

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Why Choose A/C Technical Services?

We’re Committed to Quality Customer Service With Every Job

Licensed & Insured
We make it easy for you to have confidence in the team you call.
Hablamos Español
Work with an HVAC technician who speaks your language.
Backed by a Warranty
We back all of our services with a warranty for your peace of mind.
Available Day or Night
No matter when you need us, we're ready to help.

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Fast and Professional
“If you need an AC company. Go no further. Fast, professional, and great communication to take care of client.”

- John S.

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