A/C repair in Katy covers a lot of ground. The City of Katy grew up around a rail stop and rice farms, while the much larger Katy area around it is a spread of master-planned subdivisions, some built inside a federal flood reservoir. Here is what makes cooling and heating a Katy home different, and how one free call reaches a local company.
Houston Air & Heating does not fix air conditioners. Dial (832) 662-4107 and an automated assistant asks what you need and what is going wrong, then hands the call to an HVAC company in the Katy area that is independent and locally owned. It looks at the system, gives you its price and does the repair, and you pay it directly.
Katy: a railroad town that became a three county suburb
Settlers first called this stretch of coastal prairie Cane Island, after a creek full of cane, and by 1847 it was a stagecoach stop on the San Felipe Road. The town was platted in 1895, got its post office and its name in January 1896, and sat on the Missouri, Kansas and Texas rail line. Rice farming and rice mills carried it for decades. Katy did not incorporate until 1945.
Today the city counted 21,894 people in the 2020 census and reaches into Harris, Fort Bend and Waller counties. Most people with a Katy address actually live outside it. Cinco Ranch, for example, is an unincorporated community of nearly 17,000 people about 10 miles southeast of the city. That matters for permits, for which county handles flood questions and for who you call when something goes wrong.

Services Katy homeowners ask about
Most summer calls are plain AC repair: warm air, a unit that hums but will not start, or ice on the copper line. A system that quits on a holiday weekend is what emergency AC repair is for. Search data shows a steady interest in AC replacement in Katy, which fits an area where the first wave of subdivisions now has aging equipment, so the AC installation and replacement page is worth reading before you sign anything. And when the first cold front comes through, furnace repair takes over.

AC Repair in Houston
Warm air, a unit that hums but will not start, ice on the lines or a tripped breaker. How a careful diagnosis works in Houston heat and what to ask before you approve a repair.

Emergency AC Repair (24/7)
No cooling at night, on a weekend or during a heat wave or power outage. What to do while you wait and who is most at risk.

AC Installation and Replacement
Why a load calculation matters more than the brand, what a complete replacement quote lists, and permits in Houston.

Furnace Repair
Gas furnace not lighting, short cycling or smelling hot on the first cold front. Gas and carbon monoxide safety first, then what a technician checks.
Katy homes and the Barker Reservoir
The Addicks and Barker reservoirs are federal flood control lakes that sit dry most of the time. During Hurricane Harvey in 2017 they filled, and some Katy area neighborhoods learned they were built inside the Barker flood pool.
What happened upstream
The Army Corps of Engineers kept the reservoir gates closed during the storm to hold water behind the dams. Water backed up onto private land, and Fort Bend County leaders named Canyon Gate, Kelliwood, Cinco Ranch and areas along Mason Road among the neighborhoods that flooded.
What a court found
In December 2019 a judge on the U.S. Court of Federal Claims ruled that the way the government built and ran the dams amounted to a taking of the upstream properties that flooded, which opened the door to compensation for owners.
What it means for your AC
If your home flooded then or since, a condenser or air handler that sat in water deserves a careful look, even if it seemed to run fine afterward. If you are replacing equipment, ask whether raising the condenser and air handler makes sense for your lot.
Growth, new houses and first replacements
Katy ISD shows how fast the area keeps filling in. Demographers reported that the district gained about 14,870 students, or 18.6 percent, over five years, more than any other Houston area district. Much of that growth is in the northwest part of the district, where master-planned communities such as Elyson and Cane Island are still being built.
That mix means a Katy street can hold a 40 year old house next to one that is two years old. Each has its own typical problems. In a brand new home, the builder's warranty may cover a system that never cooled one room properly, so read it before you pay for a repair. In a home from the 1990s or early 2000s, the original equipment has likely been replaced once already, and the ducts in a hot attic may be due for a check too.

Safe checks before you call
- Thermostat. Set it to Cool, lower than the room is now, and put in fresh batteries when the display looks dim or blank.
- Filter. A filter packed with dust can freeze the coil and stop the airflow. Swap it if you can see it is clogged.
- Breaker. Reset a tripped AC breaker one time. A second trip means the circuit needs a professional.
- Outdoor unit. Pull grass clippings, leaves and toys away from the condenser so it can breathe.
- Water at the indoor unit. A full drain pan or a tripped float switch can shut the system down. Note it and tell the company.
Gas smell or carbon monoxide alarm? Gas service in the Katy area comes from either CenterPoint Energy or SiEnergy, depending on the address. If you smell gas, get everyone out, then call 911 and the gas company named on your bill from outside. If a carbon monoxide alarm sounds, leave the house and call 911.
Power, gas and permits for a Katy address
CenterPoint Energy owns the poles, wires and meters in the Katy area and handles outages. Katy is in the part of Texas with retail electric choice, so the company that bills you is the retail provider you picked, not CenterPoint. When the whole street goes dark, report it to CenterPoint. When only the AC is down, the problem is in the equipment or its circuit, which an HVAC company handles.
Inside the city limits, Katy's Permit and Building Services division handles permits and inspections. The city lists installing air conditioning and heating systems as work that needs a permit, has adopted the 2021 International Building Codes, and has mechanical contractors register with the city every year. Outside the city, different rules can apply depending on the county, so ask the company to spell out which permit, if any, your replacement needs and to list it on the quote.

Questions to ask a Katy HVAC company
- What is your Texas ACR license number? Then check it on the state's license search before work starts.
- Is my house inside Katy city limits? It decides whether the city permit applies.
- Did this unit or its wiring ever sit in floodwater? Ask them to look, especially near the reservoirs.
- Did you size the new system with a load calculation? A replacement should fit the house as it is now, not just copy the old tonnage.
- What refrigerant does the new system use? New equipment has moved to newer refrigerants, and the indoor and outdoor parts must match.
Why Katy homeowners call the line
One number across three counties
Whether your Katy address is in Harris, Fort Bend or Waller County, the same free number puts you through to an independent company that works in the area.
Any hour, including storm season
An automated assistant answers around the clock. If the company cannot pick up, your name, number and problem are passed along so it can call you back.
You pay the company, not the line
Calling is free. The HVAC company inspects, quotes and bills you directly, and the line never adds a charge.
Help checking who shows up
This site explains how to search TDLR's records for a company's Texas air conditioning license, and check it yourself ahead of signing.
How a Katy call works
- Dial the numberAn automated assistant picks up (832) 662-4107 at any hour and asks what you need help with.
- Say what is wrongTell it whether the trouble is cooling or heating, where in the Houston area you are, and what the system is doing.
- Reach a local companyYour call is transferred to an independent, locally owned HVAC company, which gets a short summary of your problem before it answers.
- Work it out with themThat company inspects, quotes, repairs and bills you directly. If nobody can pick up, your name, number and problem are passed on for a call back.
About this line: Houston Air & Heating is a free phone line, not an HVAC contractor. It answers your call and connects you with an independent local heating and air conditioning company, which inspects, quotes and does the work, and which you pay directly. Companies may pay a referral fee. You never pay the line. Read how the line works.
Verify the license before work begins. Texas requires anyone contracting to do air conditioning, refrigeration or heating work to hold an Air Conditioning and Refrigeration (ACR) Contractor license from the Texas Department of Licensing and Regulation (TDLR). Ask the company for its ACR license number, then confirm it on the TDLR license search (opens in a new tab). The line does not check this for you.
Areas near Katy
Every greater Houston community the line serves:
