HVAC Contractor · Katy, TX
HVAC Contractor in Katy, TX: Licensed, Local-Serving, Same-Day
It’s 3pm on a 99°F August afternoon in Cinco Ranch and the AC just quit. The real question isn’t only who can fix it. It’s who can actually get to your street in Katy today. Call (713) 598-2737 and we’ll tell you what’s wrong, and what it costs, before anyone touches the system.
Same-Day Service
AC · Heating · Heat Pumps
- Same-Day
- No After-Hours Surcharge
- TACLA72152E
One Call, Same-Day Cooling
Licensed TACLA72152E · Since 2016
Class A, verifiable on the TDLR registry
No after-hours surcharge, ever
Dispatched from the west side, not Loop 610
Houston-local since 2016
75 Degree AC is a licensed HVAC contractor (TACLA72152E) serving Katy, TX, covering ZIP codes 77449, 77450, 77493, and 77494 across Harris, Fort Bend, and Waller counties. Founded in Houston in 2016, the company holds a 5.0-star Google rating across 240 reviews, completes most repairs same-visit, and charges no after-hours surcharge. Call (713) 598-2737.
Reviewed by Kenny Ho, NATE-certified lead technician, 75 Degree AC (License TACLA72152E). Serving the Houston metro since 2016. Last updated: June 2026.
When a system quits in August, the real question isn’t just who can fix it. It’s who can actually get to your street in Katy today. So that’s where this page starts.
Are You a Katy Company, or Do You Drive From Houston?
We’ll answer it straight, because it’s the question most Katy homeowners are really asking. No, we don’t keep a storefront in Katy. 75 Degree AC dispatches from our Houston headquarters at 4800 W 34th St, and our trucks reach most of Katy in 30 to 45 minutes by way of I-10 or the Grand Parkway (TX-99). Same-day service is normal here, not a special favor.
What “local” actually means on an HVAC call is whether the person who shows up knows your area. Ours do. We’ve been working Cinco Ranch gate codes, Kelliwood HOA rules, and the builder-grade systems in Elyson and Firethorne since 2016. The dispatch board sends whichever truck is closest on the west side, not the one stuck inside Loop 610. And the number you call, (713) 598-2737, reaches the same team that services your neighbors.
Our Complete HVAC Services in Katy, TX
75 Degree AC handles the whole HVAC system for Katy homes and small commercial buildings. One thing we don’t touch: air duct cleaning or attic insulation. We’re a focused heating and cooling contractor.
AC repair in Katy
Diagnostics, capacitors, contactors, compressors, refrigerant, and drain lines.
AC installation and replacement
Right-sized systems, not whatever fits the old footprint.
Heating and furnace repair
Gas furnaces, electric heat, ignition and heat-exchanger work.
Heat pump service and installation
Repair, replacement, and dual-fuel setups.
AC maintenance and tune-ups
Seasonal checks before the Katy summer load hits.
Indoor air quality
Media filtration, UV, and humidity control (no duct cleaning).
Ductless mini-split
Room additions, garages, and the bonus rooms common in Cinco Ranch homes.
Light commercial HVAC
Rooftop units and split systems for Katy and Fort Bend businesses.
AC repair in Katy → · AC installation, heating & furnace repair, tune-ups, ductless, and commercial pages for Katy are rolling out now.
Same-Day & 24/7 Emergency HVAC in Katy, No After-Hours Surcharge
If your AC dies at 11pm on a Saturday in July, you pay the same diagnostic fee you’d pay at 10am on a Monday. No weekend rate. No holiday rate. No after-hours surcharge of any kind.
The phone is answered live
Call (713) 598-2737 and a person picks up, not a voicemail box somebody checks in the morning.
Same-day on most requests
With priority routing for no-cooling calls when a household has infants, elderly residents, or anyone medically fragile.
The truck carries the common parts
So most emergency calls finish in one visit instead of stretching into a multi-day wait.
What HVAC Service Costs in Katy, TX in 2026
No work starts until you approve a written, line-item quote. The diagnostic fee is flat, disclosed up front, and applied toward the repair if you go ahead. The ranges below are typical Katy-area market ranges for common jobs, not a fixed price list. Your actual quote depends on the part, the system, and how hard it is to reach.
| Service | Typical Katy range (2026) | What it covers |
|---|---|---|
| Diagnostic / service call | $89 flat (applied to repair) | Full system check, written findings |
| Run/start capacitor replacement | $180 to $350 | The #1 post-storm failure |
| Contactor replacement | $200 to $400 | Common surge-related failure |
| Condenser fan motor | $400 to $600 | Outdoor-unit motor failure |
| Seasonal tune-up | $89 to $149 | Multi-point inspection and cleaning |
| Full system replacement | $5,400 to $14,800 | 2,000+ sq ft Katy home, varies by brand and SEER2 |
Here’s why that matters. A common Katy complaint is being quoted thousands for a replacement when a $200 to $400 part was the real fix. We show you the failed component before we pull it, and we quote repair and replacement side by side. We don’t make more money by selling you a new system.
Katy Neighborhoods & ZIP Codes We Cover
Katy is unusual. The same “Katy, TX” address can sit in Harris, Fort Bend, or Waller County, and the city limits thread through all three. We cover all of it.
| Neighborhood / area | ZIP | County | Notes |
|---|---|---|---|
| Cinco Ranch | 77450 / 77494 | Harris / Fort Bend | One of the largest master-planned communities in the U.S. |
| Kelliwood | 77450 | Harris | Gated pockets, mature trees, 1990s and 2000s systems |
| Firethorne | 77494 | Fort Bend | Newer construction near FM-1463 and I-10 |
| Seven Meadows | 77494 | Fort Bend | Resort-style master-planned community |
| Elyson | 77493 | Harris | New construction near FM-529 and the Grand Parkway |
| Falcon Landing | 77494 | Fort Bend | Established homes near the Grand Parkway |
| Bear Creek Village / Westfield | 77449 | Harris | Older housing stock, more R-22 and full-replacement work |
| Tamarron / Jordan Ranch | 77494 | Fort Bend | New builds on the Katy and Fulshear edge |
We also work the Katy Mills corridor, the I-10 Energy Corridor, and Ventana Lakes. Tell the dispatcher your subdivision and ZIP and you’ll get an honest arrival window, not a vague “sometime today.”
HVAC Brands & Models We Service in Katy
We aren’t locked into one manufacturer, so the recommendation fits your home and budget instead of a factory quota. We install and service every major brand, and we’ll name the specific current models we work on:
| Brand | Models we install and service |
|---|---|
| Carrier | Infinity 24ANB7 · Performance 24ABC6 · Comfort 24ABB6 |
| Trane | XV20i · XR17 · XL18i |
| Lennox | Signature SL28XCV · Elite EL18XCV · Merit 14ACX |
| Goodman | GSXC18 · GSX16 · GSX14 |
| Daikin | DX20VC Fit · 19-Series · Aurora multi-zone |
| Mitsubishi Electric | M-Series ductless · P-Series · Hyper-Heat |
| Rheem / American Standard / Bryant | Prestige RA20 · Platinum 20 · Evolution 189BNV |
For room additions and the bonus spaces you see in a lot of Cinco Ranch and Seven Meadows homes, a Mitsubishi M-Series ductless unit cools a single zone without extending ductwork.
Built for Katy's Heat & Humidity: Why SEER2 Sizing Matters Here
Katy runs hot and wet. Greater Katy averages 102.4 days a year at or above 90°F, with an average August high near 94.9°F and yearly humidity around 74.7% (NOAA, George Bush Intercontinental normals). That load is the reason sizing and efficiency are more than sticker numbers here.
The floor is 14.3 SEER2
Texas sits in the DOE South region, where new split systems have to meet a 14.3 SEER2 minimum. For Katy's long cooling season, we usually point people toward 16+ SEER2.
Bigger is not better
A frequent problem in new Katy builds is an oversized AC that cools fast, shuts off, and never runs long enough to pull the humidity out of the air. The house ends up cold and clammy at the same time.
Right-sizing is a calculation
We base replacement sizing on a Manual J load calc for your home, and every system we install is matched in the AHRI Directory, the verification CenterPoint rebates require.
Repair or Replace? The R-410A to R-454B Decision in 2026
Two things changed the math in 2026. First, under the EPA AIM Act, the old R-410A refrigerant is phasing down through 2036, and systems built in 2025 and later use R-454B (Puron Advance) or R-32. Second, that transition pushed up the cost of a full replacement. Here’s a straightforward way to think it through:
Check the age
Under about 8 years and well maintained leans toward repair.
Find the failure
A capacitor, contactor, or motor is a repair. A failed compressor or a leaking coil on an R-410A system is where replacement enters the conversation.
Price the repair against the unit
If the repair comes in under roughly $1,000 on a younger system, repair usually wins.
Factor in the refrigerant
When the outdoor unit fails on an aging R-410A system, you're often replacing the matched system rather than topping off a refrigerant that's on its way out.
Run the rebate
CenterPoint Energy offers up to $500 on a qualifying ENERGY STAR heat pump plus $75 for a smart thermostat in 2026, which can tip the decision.
A quick note on tax credits. The federal 25C HVAC tax credit expired December 31, 2025, and Texas HEEHRA hasn’t launched. Any Katy contractor still advertising a $2,000 federal credit is working from old information. The live savings path in 2026 is the CenterPoint rebate above.
Common HVAC Problems in Katy Homes
Some failures show up here more than the national averages would predict. Blame the climate, the power grid, and the flood history.
After a CenterPoint outage or surge, the AC won't restart
This spiked after Hurricane Beryl in 2024 and comes back with every major outage since. When power snaps on, the surge often takes out a $180 to $400 capacitor or contactor, not the whole system. If a contractor's first move is to quote a replacement on a unit that died the day power came back, get a second opinion.
The unit sat in water after Harvey or a Barker/Addicks release
West Katy and parts of Cinco Ranch carry real flood exposure. An outdoor condenser briefly submerged, then professionally dried and inspected, is often salvageable. Prolonged submersion or black-water contact usually means replacement. Either way, we document the condition so you can file a flood-insurance claim.
The house runs all day but won't drop below 80°F
In Katy's heat, that usually points to low refrigerant, a dirty coil, or an undersized system fighting the load. It's a diagnostic, not a guess.
The float switch keeps shutting the system off
High humidity feeds biofilm in the condensate drain line. The drain backs up, the float switch trips the way it's designed to, and the AC stops cold. Clearing and treating the line fixes it.
Who Pulls the Permit in Katy? (City vs County)
Because Katy spans three counties, the permit office depends on exactly where your home sits. We pull the mechanical permit for you and handle the inspection, so you aren’t chasing paperwork.
| Where your home sits | Permit authority | Phone |
|---|---|---|
| Inside City of Katy limits (much of 77493) | City of Katy Building Permits, 901 Avenue C | (281) 391-4830 |
| Unincorporated Harris County (77449, parts of 77450) | Harris County Office of the County Engineer | (713) 274-3232 |
| Unincorporated Fort Bend County (77494, parts of 77450) | Fort Bend County Engineering, Richmond | (281) 633-7500 |
| Western 77493 fringe | Waller County, Hempstead | (979) 826-7600 |
Why Katy Homeowners Choose 75 Degree AC
We’re a Houston-area HVAC company that’s worked Katy and the west-side suburbs since 2016, and we bring the same specifics to every call.
Licensed and verifiable
Texas license TACLA72152E (Class A). Verify it yourself on the TDLR public registry in about 30 seconds. After Beryl, Katy saw a wave of door-to-door operators with no license on file. We've held ours since 2016, in public record.
A named, credentialed lead tech
Lead technician Kenny Ho is NATE-certified and holds EPA Section 608 Universal certification. Every dispatched tech carries EPA 608, and we run an 18-point diagnostic before quoting a repair.
Parts on the truck
Trucks carry capacitors, contactors, ECM blower modules, condenser fan motors, float switches, and both R-410A and R-454B, so most Katy calls finish in one visit.
Honest scheduling
You get a confirmed arrival window at booking and an ETA text before the tech shows up.
Real warranty terms
Workmanship is backed for one year on repairs, with the manufacturer's parts warranty (up to 10 years on registered equipment). Same issue back inside 12 months, the re-fix carries no diagnostic fee.
Insured
$1M general liability and $1M workers' compensation.
5.0 stars across 240+ Google reviews. We also serve Richmond, Cypress, and Sugar Land, so our Richmond TX HVAC team covers the Fort Bend side too.
What Katy Customers Say About Our HVAC Services
Live, unedited reviews from 75 Degree AC’s Google Business Profile — a 5.0 average across 240+ reviews from across the Houston metro.
Frequently Asked Questions: HVAC in Katy, TX
Do you have a Katy office or do your technicians drive from Houston?
No, we don’t have a Katy storefront. Our techs dispatch from the Houston headquarters and reach most of Katy in 30 to 45 minutes by I-10 or the Grand Parkway, with same-day service available. The dispatcher routes the closest west-side truck, and we’ve worked Katy’s neighborhoods and HOAs since 2016.
Which Katy ZIP codes and neighborhoods do you cover?
We cover 77449, 77450, 77493, and 77494, including Cinco Ranch, Kelliwood, Elyson, Firethorne, Seven Meadows, Falcon Landing, Tamarron, Ventana Lakes, Bear Creek, and the Katy Mills corridor. Because Katy spans Harris, Fort Bend, and Waller counties, tell us your subdivision and we’ll confirm an arrival window.
What HVAC services do you offer in Katy, TX?
AC repair, AC installation and replacement, heating and furnace repair, heat pumps, ductless mini-splits, indoor air quality, maintenance, and light commercial HVAC. We do not offer air duct cleaning or attic insulation; we focus on the heating and cooling system itself.
Are you a licensed Texas HVAC contractor?
Yes. 75 Degree AC holds Texas license TACLA72152E (Class A). You can confirm it on the TDLR public registry at tdlr.texas.gov/LicenseSearch. Every technician we dispatch works under that license and carries EPA Section 608 certification.
How much does HVAC service cost in Katy, TX in 2026?
The diagnostic is a flat $89, applied toward the repair if you proceed. Common repairs run roughly $150 to $1,200 depending on the part, a tune-up is $89 to $149, and a full system replacement for a typical Katy home runs about $5,400 to $14,800 depending on brand and SEER2. You approve a written quote before any work begins.
Do you offer 24/7 emergency HVAC service with no after-hours surcharge?
Yes. We answer the phone live at (713) 598-2737, run same-day on most requests, and charge no weekend, holiday, or after-hours surcharge. The diagnostic fee at 11pm Saturday is the same as 10am Monday.
What CenterPoint rebates can I get on a new AC in Katy?
CenterPoint Energy offers up to $500 on a qualifying ENERGY STAR heat pump plus $75 for a smart thermostat in 2026. The federal 25C tax credit expired December 31, 2025, and Texas HEEHRA has not launched, so CenterPoint is the active rebate path this year.
Should I repair or replace my AC in 2026 if it uses R-410A?
Repair usually wins if the system is under about 8 years old, has no major leak, and the repair runs under roughly $1,000. Replacement enters the picture when an aging unit has a failed compressor or a leaking coil, since R-410A is phasing down and new 2026 systems use R-454B. We quote both side by side so you decide.
What HVAC brands do you service and install in Katy?
Carrier, Trane, Lennox, Goodman, Rheem, American Standard, Daikin, Mitsubishi, and Bryant, all major brands. We don’t hold a single-brand exclusivity, so the recommendation fits your home rather than a factory quota.
After Hurricane Harvey or Barker/Addicks flooding, can a submerged AC unit be repaired?
Sometimes. An outdoor condenser that was briefly submerged, then professionally dried and inspected, is often salvageable. Prolonged submersion or black-water contact usually calls for replacement. We document the unit’s condition either way so you can support a flood-insurance claim.
Call a Licensed Katy HVAC Contractor Today
Whether the AC quit this afternoon in Cinco Ranch or you’re weighing a replacement before the next Katy summer, you can talk to a licensed technician right now. Same-day service, a flat diagnostic, no after-hours surcharge.
Serving Katy From
Houston HQ at 4800 W 34th St, Ste C50F · covering 77449, 77450, 77493 & 77494 across Harris, Fort Bend & Waller counties
Hours
Live dispatch 24/7 · same-day service, nights, weekends & holidays · no after-hours surcharge
License
Texas TACLA72152E · EPA 608 + NATE · verify at TDLR