AC Repair & Service in Round Rock, TX

Koala Cooling & Plumbing is based in Round Rock and repairs every major AC brand, usually the same day when our schedule allows. The service call is $131, or $49 for Koala Club members and waived when you have paid work done. Diagnosis is free, and you approve the written repair price before we start any work.

When your AC goes out in Round Rock in July, you don't have time to wait. Koala Cooling & Plumbing has been Round Rock's hometown AC team since 2019 — same-day service available, pricing posted online before anyone sets foot in your house, and over 1,050 five-star HVAC reviews from your neighbors.

AC Services We Provide in Round Rock

AC Repair

Whether it's a refrigerant leak, a failed capacitor, or a compressor on its way out, our licensed technicians diagnose it fast and fix it right. Same-day appointments available.

AC Repair

AC System Replacement

If your system is 12+ years old or the repair cost doesn't make sense, we'll walk you through replacement options with pricing posted online — no salesperson, no pressure.

AC Replacement

See System Costs Now

Heat Pump Services

Installation, repair, and maintenance for heat pump systems across Round Rock. Central Texas is one of the best climates in the country for heat pumps — we'll help you decide if it's the right fit. Have a gas furnace instead? See our furnace and heating repair page.

Heat Pump Services

Preventative Maintenance

A Koala Club membership keeps your system tuned before the hottest days hit — for $28.79/month you get annual inspections, priority scheduling, and no service fees.

Common AC Repairs We Make in Round Rock

Round Rock summers regularly push past 100°F, and most of the breakdowns we see come from parts wearing out under that load. These are the repairs we make most often:

Clogged condensate drain line — our most common call. Left alone, it can shut the system down or back water into your ceiling. $277 at our standard price, $249 for Koala Club members.

Failed capacitors — the part that helps your compressor and fan motors start. We test them against the manufacturer's tolerance and replace weak ones before they quit on the hottest day of the year.

Refrigerant leaks — found with electronic leak detectors, then UV dye if needed. We weigh in the refrigerant, so you're billed for exactly what your system took.

Frozen evaporator coils — usually an airflow or refrigerant problem. Here's what to do (and not do) if your AC freezes up.

Fan motors and compressors — checked with amp-draw readings, so we know what has actually failed before we replace anything.

See our full AC repair services for everything else we fix.

How We Diagnose and Price Your Repair

Every Koala technician carries our StraightForward Pricing™ book — about 100 of our most common repairs, priced in advance. Everyone in Round Rock pays the same published price, from $98 for minor repairs up to $2,449 for the largest compressor valve jobs, and your tech shows you that price before any work begins.

To get the diagnosis right, we use digital gauges and check superheat and subcooling — the readings that show how your system is really performing. We don't just top off refrigerant and hope it holds.

Repair or Replace? A Straight Answer

If your system is 12 years or older, or a repair costs more than the system is worth, we'll tell you — and you can see real replacement prices for every system and tier on our AC replacement cost page before anyone visits. Not sure where your system stands? Read AC repair vs. replace: how Round Rock homeowners can tell the difference.

If you do replace, we size the new system with a Manual J load calculation (here's what size AC you actually need), and we come back after the install to re-check and fine-tune the refrigerant charge once your home's heat load has settled.

Koala Club

Why Round Rock Homeowners Choose Koala

Local since 2019 — we're not a franchise. Scott and Stacie Feller started Koala in Round Rock and still run it here.

Prices posted online — every system, every tier, before anyone comes to your house.

1,050+ five-star HVAC reviews — 4.9 stars on HVAC from your actual neighbors, not aggregate reviews from across Texas.

100% Satisfaction Guarantee — if we can't make you happy, we remove our equipment and refund every dollar. In writing.

Same-day availability — call by mid-morning and we're typically on site that day.

Carrier Factory-Authorized and a Lennox dealer — and licensed by the State of Texas (HVAC license TACLA26515E).

1st place for HVAC in the 2025 Best of Round Rock Awards.

Round Rock Neighborhoods We Service

We run calls every day across all of Round Rock — Forest Creek, Teravista, Paloma Lake, Walsh Ranch, Stone Canyon, Chandler Creek, Mayfield Ranch, Great Oaks, Vista Oaks, Sonoma, and every neighborhood in between. If you're in a Round Rock zip code, we can get to you fast.