AC Installation in Rio Grande City, TX

AC installation in Rio Grande City has one job that matters more than anything else: keeping a house comfortable through long stretches near or above 100°F without running up the power bill. That starts with choosing the right type of system, sizing it to the actual house, and installing it so the refrigerant circuit is clean, tight and charged correctly.

956 Multi Service sells and installs new air conditioning equipment across Starr County and western Hidalgo County. Many installs are finished the same day the customer picks a unit, and the old equipment leaves on our truck. This page walks through the choices, the sizing, the install day and what drives the cost, then points you to the more specific pages for replacements, manufactured homes, new builds and payment options.

Every install we quote includes:

• A Manual J load calculation and a duct check
• Refrigerant recovery and haul-off of the old equipment
• Pad, line set, disconnect and condensate drain
• Brazing, a pressure test and a deep vacuum
• Start-up readings and thermostat setup

Choosing between central, package and ductless equipment

Most homes in the area end up with one of four setups. The right one depends on whether the house already has ducts, where those ducts run, and how much room there is in the attic or under the floor.

If you are leaning toward ductless, our mini-split installation page covers head placement and multi-zone layouts in more depth. For heating as well as cooling, see how heat pumps handle a Valley winter.

How big should the new AC be for this heat?

Tonnage is where many installs go wrong. A unit that is too large drops the temperature quickly, shuts off, and never runs long enough to pull moisture out of the air, so the house feels cool and clammy at the same time. A unit that is too small runs all afternoon and still loses ground on the hottest days.

We size with a Manual J load calculation, the industry method published by ACCA. It accounts for floor area, ceiling height, insulation depth, window size and which way the glass faces, infiltration, and the number of people in the house. The old unit's size is a clue, not the answer, because many homes here were fitted with whatever was on the shelf at the time.

Efficiency is the second decision. Since 2023, systems are rated in SEER2, a stricter test than the old SEER number. Texas falls in the Department of Energy's Southeast region, so a new split central AC under 45,000 Btu/h has to meet at least 14.3 SEER2, and larger systems at least 13.8 SEER2. New equipment is also built for R-454B or R-32 refrigerant instead of R-410A, which changes which coils and line sets can be paired with it.

Install day, start to finish

The whole job, in order:

1. Call and describe the house and the old system.
2. Walk-through: rooms, windows and insulation measured; ducts, pad and wiring checked.
3. Written options for each system.
4. Scheduling, often the same day you choose when the schedule allows.
5. Install: removal, setting, sealing and charging, below.
6. Handover: start-up readings, thermostat and warranty paperwork.

A typical replacement on existing ductwork goes in this order:

Prep and removal

The power is shut off at the disconnect, refrigerant is recovered from the old system into a recovery cylinder, and the old condenser and indoor coil come out.

Setting the new equipment

The new outdoor unit is set level on a solid pad. If the old pad has sunk or cracked, our crew also pours concrete condenser pads, so that does not need a second contractor. The indoor coil or air handler goes in next, with a clean condensate drain and a float switch where the layout calls for one.

Sealing and charging

Joints are brazed, the system is pressure tested, then pulled into a deep vacuum to remove air and moisture.

Refrigerant is released and the charge is fine-tuned using superheat or subcooling readings, the measurements that tell a technician whether the coil is getting the right amount.

Haul-off and handover

The old unit is loaded on the truck and the work area is cleaned up.

We finish by checking airflow at the vents and setting up the thermostat with you.

Replacement, mobile homes, new builds and financing

Installation covers several different situations, and each has its own page:

• AC replacement is for houses with a working duct system and a tired or failed unit, including older R-22 equipment that is no longer worth recharging.
• Mobile home AC deals with package units, belly ducts and the sizing quirks of single-wide and double-wide manufactured homes.
• New construction HVAC covers load-calculated design, rough-in and duct layout for new houses and room additions.
• AC financing explains how to compare payment offers when a new system is not in this month's budget.

What moves the installed cost up or down

We do not publish a flat price because two installs that look alike from the street can be very different jobs. The quote depends on:

• Tonnage and efficiency tier. Bigger systems and higher SEER2 models cost more up front.
• System type. A package unit, a split system and a multi-zone mini-split each carry different equipment and labor.
• What can be reused. A sound pad, disconnect and ductwork keep costs down. Undersized or leaking ducts, a line set that is too small or too old for the new refrigerant, or a corroded disconnect add to the job.
• Access. Tight attics, crawl spaces under manufactured homes and long line-set runs take more time.
• Electrical work. Some older homes need a new breaker, wire size change or disconnect.
• Add-ons. Float switches, surge protection, a new thermostat or ductwork repairs.

The federal 25C energy tax credit ended for equipment placed in service after December 31, 2025, so it does not apply to 2026 installs. Ask your electric provider and the equipment manufacturer about current rebates, and check with a tax professional for your situation.

Warranty registration and first-year care

New equipment carries the manufacturer's parts warranty, and many brands extend it only if the unit is registered online within a set window after install. Keep your invoice and the model and serial numbers somewhere you can find them. Texas requires anyone installing A/C equipment to hold a TDLR licence, and you can look up any contractor on the TDLR website before you sign.

Permits, codes and refrigerant rules

Inside Rio Grande City limits, the Planning and Code Enforcement Department issues permits and inspects mechanical and electrical work to International Code Council standards; outside the city, ask what applies at your address. EPA Section 608 requires the old refrigerant to be recovered, not released. R-454B and R-32 are rated A2L, mildly flammable, so installs follow the manufacturer's leak-check steps.

For the first summer, change or wash the filter on schedule, keep weeds and mesquite branches cut back from the outdoor unit, and rinse caliche dust off the coil fins with a gentle hose spray. A tune-up before the next hot season keeps the new system running the way it did on install day.

Why homeowners pick 956 Multi Service for a new system

956 Multi Service has served Starr County since July 2024 as a small Rio Grande City crew, and our 41 Google reviews average 5.0, many praising clean, same-day installs. The same people set the condenser, pour the pad and haul the old unit off. Phones are answered 8 AM to 7 PM, Monday to Saturday. Payment options: cash, Discover, American Express, MasterCard or Visa, with financing available on new equipment.