Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateHVAC Company in Round Rock, TX
Round Rock’s HVAC needs aren’t the same as Austin’s or Cedar Park’s. Our crews here work on everything from 1980s tract homes with original equipment to brand-new builds in Teravista, often on the same day. The common thread is the Texas heat: when a compressor fails during a 100°F stretch, the repair can’t wait until next week. We’re Coldharbour Heating & Air, and we put a written price in your hand before any work begins. If a repair fails within 365 days, we return and correct it at no charge. Call (361) 204-1605 when your system stops doing its job.
Why Round Rock Homes Are Different
Round Rock grew fast, and that growth shows up inside your walls. Homes built in the 1980s and 1990s housing booms – many in the older sections along Mays Street and Sunrise Road – often have attic-installed gas furnaces and condenser units that are now twenty to thirty years old. We see capacitor failures, corroded contactors, and heat exchangers that have quietly cracked from years of expansion and contraction. Newer construction in master-planned communities like Paloma Lake and Teravista presents the opposite problem: high-efficiency systems with tighter building envelopes that need careful load calculations when anything changes, because the original sizing was done to the inch.
On the east side, homes built in the 1960s and 1970s sometimes still run on original galvanized ductwork. Central Texas humidity corrodes that galvanized steel from the inside, restricting airflow until blower motors burn out repeatedly. The same repair on the west side might be a simple motor swap; on the east side, it might require ductwork attention to keep the new motor alive. Winter matters less here than up north, but freeze events like Winter Storm Uri in 2021 exposed undersized heat pump defrost cycles and poorly insulated condensate lines across Round Rock. We plan for that kind of cold in our fall furnace checks.
Styles & brands we work with
Our Main Round Rock Services
Most calls we get in Round Rock fall into two buckets: air conditioners that quit during the summer, and furnaces that act up when the rare freeze hits. Here’s how each one works in this city.
AC Repair in Round Rock
Summer is when Round Rock’s air conditioners show their age. A unit that limped through May often flatlines in July, when 100°F days push compressors and capacitors past their limit. We diagnose first – no opening a cabinet and guessing – then hand you a written price before any tool comes out. Most repairs run $150 to $650 in Round Rock, and every repair comes with our 365-Day Done Right Promise. If the same problem returns within a year, we come back and fix it at no charge. That guarantee is on paper, not remembered by whoever answered the phone. Full details are on our AC Repair in Round Rock page.
Furnace Repair in Round Rock
Round Rock furnaces spend most of the year idle, which means the first cold snap is when ignition problems surface. Older attic units are especially prone to flame sensor buildup and igniter failures after months of sitting. We work on gas furnaces, electric furnaces, and heat pumps across the city, from older neighborhoods near downtown to newer subdivisions. Repairs typically fall between $150 and $700, and the price is written down before we start. Our Furnace Repair in Round Rock page covers the most common jobs, including what a furnace tune-up before winter should cost.
AC Installation in Round Rock
A new air conditioning system in Round Rock isn’t a phone quote. It’s a load calculation based on your home’s square footage, window direction, insulation, and ductwork condition – and those variables differ block to block here. A 1980s home with original ducts needs a different plan than a 2015 build in Teravista. New systems in Round Rock typically run $3,500 to $7,500 installed, depending on efficiency and the state of your existing ductwork. We quote a fixed written price and set a firm install date. Full details on AC Installation in Round Rock.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Round Rock
Our technicians are trained across all major residential brands, so the unit already sitting in your home is a unit we can fix. We regularly service Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. Our vans carry common replacement parts for most of those brands, which means fewer second trips to the supply house. See our brands for more.
See the difference
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After
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AfterPricing for HVAC Company in Round Rock, TX
| Service | Typical range in Round Rock |
|---|---|
| AC repair (general) | $150 – $650 |
| Furnace repair (general) | $150 – $700 |
| AC installation (new system) | $3,500 – $7,500 |
| HVAC tune-up | $80 – $200 |
What pushes a repair toward the high end here is usually age and access: an attic furnace in a 1980s home with tight clearance costs more to work on than a ground-level closet unit in a newer build. The number we quote is the number you pay – it’s written down before the first tool comes out, and it doesn’t change at the door.
Neighborhoods We Serve in Round Rock
We work across the entire Round Rock area, and our techs know the difference between the older streets near downtown and the newer loops in the master-planned communities. Response times are typically within a few hours during normal business days, and same-day repair calls are common.
- Teravista
- Paloma Lake
- Mays Crossing
- Round Rock West
- Chandler Creek
Service Area – Cities Near Round Rock
Coldharbour’s dispatch is coordinated from our Austin office, and crews serve Round Rock locally every day. We also cover nearby communities for homeowners who need the same written price and 365-day guarantee: Pflugerville, TX, Leander, TX, Manor, TX, and Austin, TX.
Serving Round Rock, TX - Our Local Coverage Area
We’re based in the Round Rock area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About HVAC Company in Round Rock
Same-day service is common, especially for AC repair during heat waves and furnace calls during freezes. Our dispatch is local, and the person who answers the phone 24/7 can tell you when a technician will arrive before you hang up.
Most new AC installations and some furnace replacements in Round Rock require a permit from the City of Round Rock. We handle that paperwork as part of the installation, so you don’t need to visit city offices or file anything yourself.
Yes. Our techs are on older streets near downtown and in newer master-planned communities like Teravista and Paloma Lake every week. The tools and parts in our vans cover the equipment found in both 1980s tract homes and 2015+ builds.
If your system is acting up, call (361) 204-1605. A live person answers around the clock, and your estimate is free. If the work runs, the price is written before we start, and the repair carries a 365-day written guarantee. That’s the same promise on every job, in every Round Rock neighborhood.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Round Rock Customers Say
"Honest to a fault. Two companies told me I needed a whole new unit. Coldharbour said mine had years left and just needed a cleaning and a part. Saved me thousands."
- Marcus Reilly"Furnace was short cycling all winter. They diagnosed a bad sensor instead of condemning the whole unit like I feared. Cheap fix, honest call."
- Russ Tiedemann"Yearly tune up and they caught a cracked part I'd never have known about. Showed me the reading, replaced it, and wrote up the warranty. No upsell games."
- Dominic Rourke