The Best AC Installation & Replacement in Las Cruces

Sun City Plumbing & Heating leads Las Cruces AC installation for fast, full-day crews that finish a replacement in a single visit.

By The Scoop Editorial Team · How we pick · Updated July 2026

Editor's Pick

Sun City Plumbing & Heating

★★★★★ 4.9 · 1597 reviews

Open 24/7

  • NATE Certified
  • Trane Comfort Specialist
  • Since 1984
  • Warranty

Sun City Plumbing & Heating's installation crews get singled out for working full days to finish the job in one visit. Customers describe installers arriving before eight in the morning and staying past eight at night to complete an AC replacement rather than stretching it across multiple appointments, and more than one customer calls the process notably faster than expected. The company also handles the manufacturer side of a replacement, one customer describes a defective part being shipped under an American Standard lifetime warranty, which matters when the install itself is only half the equation on a long-term system.

"Sun City today replaced my toilet and fixed leaking issues."Verified review
Best for: homeowners who want the full replacement done in a single day
Call Now (575) 526-9758 Visit Website
Sun City Plumbing & Heating, AC Installation & Replacement in Las Cruces
Sun City Plumbing & HeatingPhoto: Sun City Plumbing & Heating
TOP OF THE TOWN LAS CRUCES, NM THE SCOOP AC INSTALLATION & REPLACEMENT
2No. 2 in Las Cruces

Starrett's Heating & Air Conditioning

★★★★★ 5 · 138 reviews

Open 8 AM–5 PM, closed Sun & Sat

  • Licensed
  • Insured
  • Since 1993
  • Warranty

Starrett's Heating & Air Conditioning customers repeatedly mention being upfront about both cost and timeline before the installation starts, which sets clear expectations from the first estimate. One customer describes the crew going well beyond a standard install by tracking down the only remaining replacement part in the city to complete a repair-and-replace job that another company might have simply upsold into a full system swap. Customers also describe frequent communication throughout the installation without having to ask for updates, and consistent praise for central air conditioning installs that perform well from day one.

"He went above and beyond in searching for the part required to replace the broken part."Verified review
Best for: buyers who want a clear cost and timeline before committing
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Starrett's Heating & Air Conditioning, AC Installation & Replacement in Las Cruces
Starrett's Heating & Air ConditioningPhoto: Starrett's Heating & Air Conditioning
3No. 3 in Las Cruces

Aircon Heating & Cooling

★★★★★ 4.9 · 306 reviews

Open 8 AM–5 PM most days, closed Sun

  • Warranty

Aircon Heating & Cooling customers describe full system replacements completed in a single day, even when the job required rebuilding parts of the system to fit new equipment properly rather than forcing an imperfect fit. One customer's entire system was removed and replaced in one visit, described as a beautiful job despite the added complexity. Customers also mention the crew taking time after installation to explain the correct filter type for the new equipment, which is a detail that affects how well a new system performs long after the installers have left the property.

"He even showed me how to properly install the filter explaining the type of filter that would be most efficient."Verified review
Best for: a full replacement where the new equipment does not match the old layout
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Aircon Heating & Cooling, AC Installation & Replacement in Las Cruces
Aircon Heating & CoolingPhoto: Aircon Heating & Cooling

How Las Cruces's Top AC Installation & Replacement Compare

How Las Cruces's top ac installation & replacement providers compare
Business Hours Known for
Sun City Plumbing & Heating Top Pick Open 24 hrs homeowners who want the full replacement done in a single day
Starrett's Heating & Air Conditioning 8 AM–5 PM buyers who want a clear cost and timeline before committing
Aircon Heating & Cooling 8 AM–5 PM a full replacement where the new equipment does not match the old layout

What People Are Saying

★★★★★
Most recently, your team installed a new air conditioner and cleaned and sealed our ductwork.
Sun City Plumbing & Heating
★★★★★
We were offered a great deal on a whole new HVAC system.
Starrett's Heating & Air Conditioning
★★★★★
I would definitely recommend AirCon to anyone needing a new HVAC system or annual maintenance.
Aircon Heating & Cooling

AC Installation & Replacement in Las Cruces

Replacing an AC system in Las Cruces is not a decision homeowners take lightly, and the crew doing the work matters as much as the equipment going in. A rushed installation shows up later as short-cycling, uneven cooling, or a warranty claim that gets denied over improper setup. We read the installation-specific feedback for every HVAC company in the market, looking for crews that show up prepared, communicate the timeline honestly, and finish the job to a standard that holds up for the next decade of Las Cruces summers.

Why AC installation timing matters in the Mesilla Valley

Demand for AC installation in Las Cruces spikes hard once summer heat arrives, and a system failure during that window often means choosing between an uncomfortable wait and paying a premium for rushed scheduling. Homeowners with an aging system are generally better served planning a replacement before the hottest stretch of the year rather than waiting for a complete failure, since installation crews book up fastest exactly when everyone else's system is also failing.

That said, several Las Cruces installers do manage fast turnarounds even during peak season, with customers describing next-day installs completed in the middle of summer. If a system fails during the hottest part of the year, it is worth calling multiple companies rather than assuming a multi-week wait is universal, since capacity varies significantly by company.

Sizing and fit: why a like-for-like AC swap is not always the right call

Replacing an AC system is not always a matter of installing new equipment in the exact footprint of the old unit. Ductwork, electrical connections, and pad or platform placement sometimes need modification to properly fit newer equipment, particularly when the replacement unit has a different tonnage or efficiency rating than what it is replacing. A rushed installation that forces new equipment into an old configuration without adjustment can create airflow or efficiency problems that show up months later.

Ask directly whether your installation requires any modification beyond a straight swap, and get that scope included in the written estimate. A company willing to explain why a rebuild or adjustment is needed, rather than quietly working around a mismatch, is generally the safer choice for a job this significant.

Manufacturer warranties on new AC installations

A newly installed AC system typically carries a manufacturer warranty on parts and components, separate from any workmanship warranty the installer provides on their own labor. These warranties can run for many years on major components like the compressor, but they generally require proper registration and, in some cases, proof that installation followed the manufacturer's specifications exactly.

Ask whether the installer handles warranty registration on your behalf and what happens if a covered part fails down the line, since coordinating a manufacturer warranty claim after installation can be more complicated without the original installer's support. A company that proactively handles this, rather than leaving it entirely to the homeowner, saves real time if something needs replacing under warranty later.

What to Know Before You Choose

Questions Las Cruces Locals Ask

Who is the best AC installation company in Las Cruces?

Sun City Plumbing & Heating is our top pick for AC installation in Las Cruces. Customers describe full-day crews completing an entire replacement in a single visit, faster than expected, along with direct coordination on manufacturer warranty claims. Starrett's Heating & Air Conditioning is a strong runner-up for buyers who want a clear cost and timeline upfront.

How long does an AC installation take in Las Cruces?

A standard residential AC replacement is often completed in a single day by an experienced crew, though jobs requiring ductwork modification or a non-standard equipment fit can take longer. Customers describe some Las Cruces installers finishing full-day jobs from early morning into the evening to complete the work in one visit.

How do I know if I need a full AC replacement or just a repair?

An honest technician will diagnose the actual issue before recommending replacement, and customers describe at least one Las Cruces company specifically recommending a filter change over an unnecessary replacement. If a technician cannot clearly explain why repair is not viable, it is worth getting a second opinion before approving a full system swap.

Is a new AC system correctly sized just by matching the old unit's tonnage?

Not necessarily. Home layout, insulation, and ductwork condition all affect proper sizing, and simply matching the old system's tonnage can result in a unit that is too large or too small for the space. A proper installation should include a sizing assessment rather than a straight equipment swap.

What warranty comes with a new AC installation in Las Cruces?

New equipment typically carries a manufacturer warranty on major components, and the installing company usually adds its own workmanship warranty on the labor. Confirm both in writing, and ask whether the installer handles warranty registration and future claims directly.

Can I get an AC installed quickly during peak summer season in Las Cruces?

It depends on the company. Some Las Cruces installers report next-day turnarounds even in the hottest part of summer, while others book out for weeks during peak demand. Calling multiple companies rather than assuming a universal wait time is the best way to find faster availability.

Still deciding? You can't miss with Sun City Plumbing & Heating, our top pick. Call Sun City Plumbing & Heating
More HVAC guides AC RepairEmergency AC RepairFurnace & HeatingMaintenance & Tune-Ups The full Las Cruces HVAC guide

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