People looking for AC repair in Carrollton, TX, are often living in a house that is about fifty years old. That age shapes almost every repair conversation, from the ductwork in the attic to the refrigerant in the lines. Below is what is different about cooling and heating a Carrollton home, and what to expect from the company you are put through to.
Dallas Air & Heating is a free phone line, not a repair shop. When you call (469) 649-7066, an automated assistant answers, asks whether the trouble is cooling or heating, and takes your name, callback number, ZIP code and a short description. Then it transfers you to an independent, locally owned heating and air conditioning company that works in Carrollton. That company diagnoses the problem, sets its own price and is paid by you.
Carrollton: a city that boomed in the 1970s
The Handbook of Texas describes Carrollton as a farming and railroad town that became known for "grain and gravel." It had only 1,610 residents in 1950. Then the Sun Belt boom arrived. The population hit 13,855 in 1970 and jumped 193 percent to 40,595 by 1980, and the Handbook notes that nearly three quarters of the city's housing at that time had been built during that one decade. The city kept growing, to 82,169 in 1990 and 133,434 in the 2020 Census.
For an air conditioner, that history is the most important local fact. A house finished in 1975 has probably been through several outdoor units by now, yet it may still have the duct layout, return grille size and attic insulation its builder chose half a century ago. A good technician looks at the whole system, not just the box in the yard, because a new condenser cannot make up for a return that is too small or ducts that leak into a hot attic.
What a 1970s Carrollton house usually needs checked
A guide to the questions worth raising, not a diagnosis. Many homes have been remodeled or had new equipment, so your house may not fit the pattern. The data plate on the outdoor unit shows its age and refrigerant.
| Part of the system | Why it matters in an older house | What to ask |
|---|---|---|
| Ductwork | Original metal trunks or early flex duct may have loose joints or crushed runs, sending cooled air into the attic. | Can you check the ducts for leaks and airflow before sizing a new unit? |
| Return air | Many older homes have a single central return. Rooms with doors closed can starve the system of air. | Is the return big enough for the equipment you are proposing? |
| Refrigerant | Systems installed before about 2010 may use R-22. The EPA ended new production and import of R-22 in 2020, so recharging one gets costly. | What refrigerant is in my system, and what would a recharge cost against a replacement? |
| Electrical | Older panels and disconnects may not match what a modern unit's installation instructions require. | Does the electrical supply need any work, and is that in the quote? |
| Attic insulation | Insulation from the 1970s has often settled, so the attic air handler and ducts sit in extreme heat. | Would added insulation change the size of system I need? |
Three counties, one set of utilities
Carrollton is one of the few DFW cities split across three counties: Dallas, Denton and Collin. That split confuses new residents, but it does not change the utilities. Oncor delivers electricity across Carrollton, which means you choose a retail electric provider for your bill while Oncor maintains the wires and handles outages. Atmos Energy operates the natural gas system; local news coverage of a January 2024 house explosion on Highland Drive, caused by gas that leaked into a sewer line, quoted the fire chief on the leak that Atmos crews found.
Here is how to tell which kind of problem you have before calling anyone:
- Nothing in the house has power. It is an outage. Report it to Oncor, and set the thermostat to Off until power comes back steady.
- Lights work but the AC is silent. Check the thermostat mode and batteries, then look for a tripped breaker and reset it one time only.
- The breaker trips again. Leave it off. A repeat trip points to an electrical fault inside the equipment that a technician needs to find.
- Air blows but it is warm. Check for a clogged filter and make sure the outdoor unit is not buried in leaves or grass clippings. If you see ice on the copper lines, shut the system off and call.
Hail, heat and the outdoor unit
Carrollton has seen what a North Texas hailstorm can do. In the early hours of June 6, 2018, baseball-size hail hit Carrollton, Coppell and Arlington. CBS Texas reported heavy property damage along Hebron Parkway and State Highway 121 on the city's west side, and reporters found smashed windows across blocks between I-35E and the Sam Rayburn Tollway. The same report cited an Insurance Council of Texas estimate of about $425 million in insured losses from that storm.
Hail is hard on condensers. The thin aluminum fins on the coil fold over when they are struck, and a badly flattened coil cannot shed heat, so the system runs longer and the head pressure climbs. After a storm, look at the outdoor unit from a few feet away. If the fins look crushed or the fan guard is bent, have a company inspect it before the next hot stretch, and photograph the damage first in case your homeowner's policy covers it.
Before you replace a system in Carrollton
- Permit. Carrollton charges mechanical permits by job value, $4 per $1,000 with a $75 minimum, and issues them through the CityServe portal. Contractors also register with the city.
- Sizing. Ask for a load calculation. A 1970s house with new windows and attic insulation may need a smaller unit than the one it has.
- Ducts. Ask whether the ducts will be tested, sealed or replaced, and get that line item in writing.
- Refrigerant. New equipment now uses lower impact refrigerants such as R-454B or R-32. In May 2026 the EPA finalized a change that lets existing R-410A equipment keep being installed while supply lasts, so ask which you are getting and why.
- License. Get the TDLR license number on the quote and look it up before signing.
Why Carrollton homeowners call the line
One number on either side of the county line
Whether your address is in the Dallas, Denton or Collin County part of Carrollton, you dial the same number and give your ZIP code, and the call goes to an independent company that serves that part of the city.
Older houses need a real diagnosis
With so much housing from the 1970s, the cause is often in the ducts or return, not the outdoor unit. You describe the symptoms once, and the company you reach hears that summary before it picks up.
Answered after storms and at night
A hail-damaged condenser or a system that quits at 11 p.m. gets the same automated answer as a weekday call. Calling the line is free, and you pay only the company that does the work.
You check the license yourself
The line does not vouch for anyone. This page shows how to look up a TDLR air conditioning license, so you can confirm it before you approve a repair or a replacement.
Services Carrollton homes ask for most
Summer calls are mostly AC repair: no cold air, a unit that hums without starting, or a frozen line set. When the system quits overnight or on a weekend, read emergency AC repair for what to do while you wait. Many homes here heat with gas, so furnace repair and a fall safety check matter before the first cold snap. If your equipment is an R-22 unit or past its second decade, AC installation and replacement explains what a complete quote should list, and an annual HVAC tune-up is a good moment to have older ducts and drains looked at.
AC Repair
Warm air from the vents, a unit that hums but will not start, ice on the lines or water in the ceiling. What a proper diagnosis covers in Dallas heat and what to ask before you approve a repair.
Emergency AC Repair (24/7)
No cooling at night, on a weekend or in a heat wave. What to do while you wait, who is most at risk, and how after-hours calls are usually priced.
Furnace and Heating Repair
No heat on a cold North Texas morning, a furnace that short cycles or a heat pump stuck in defrost. Gas safety first, then what a technician checks.
HVAC Tune-Up and Maintenance
What a real spring or fall tune-up includes, what it does not, and the simple filter and drain habits that keep a system out of trouble.
How a Carrollton call works
- Call any hourAn automated assistant answers (469) 649-7066 and asks whether it is about cooling or heating.
- Describe the problemGive your name, a callback number, your city or ZIP and what the system is doing.
- Get put throughThe call goes to an independent, locally owned heating and air conditioning company, which hears a short summary before it picks up.
- Deal with them directlyThat company diagnoses, quotes, does the work and is paid by you. If it cannot answer, it gets your details to call back.
How this line works: Dallas Air & Heating is a free phone line, not an HVAC company. 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. The line holds no HVAC license and does not repair, install or schedule anything itself. Those companies may pay Dallas Air & Heating a referral fee. You never pay the line. How it works.
Check the license yourself. In Texas, air conditioning and refrigeration contractors are licensed by the Texas Department of Licensing and Regulation (TDLR), and the license number belongs on the company's quotes and invoices. Ask for it and look it up with the TDLR license search (opens in a new tab) before work starts. It is also fair to ask for a certificate of insurance.
Areas near Carrollton
Every DFW city with its own page on this site: