Searching for AC repair in Frisco, TX, usually means a house that is newer than most in Dallas-Fort Worth, built tight, with two systems for two stories. Newer does not mean trouble free, and Frisco adds its own twist: two different electric utilities and two different gas utilities share the city. Here is what matters for a Frisco home and what the free line does when you call it.
Dallas Air & Heating does not repair or install anything. It is a free phone line. Call (469) 649-7066, say whether it is a cooling or heating problem, and give your name, number, ZIP and what the system is doing. The automated assistant then hands the call to an independent, locally owned heating and air conditioning company that works in Frisco, and you deal with that company from there.
Frisco: a railroad water stop that grew into a city of 200,000
Frisco began in the early 1900s as a watering stop for steam engines on the St. Louis to San Francisco railway line, and in 1904 residents named the town after that railroad. For most of the century it stayed tiny: 1,845 people in 1970, 6,138 in 1990. Then growth took off. The census counted 33,714 residents in 2000, nearly 117,000 in 2010 and more than 200,000 in 2020, and the Census Bureau estimated about 237,000 by mid 2025. Frisco was the fastest growing city in the country for much of the 2000s and again in 2017.
The city spans Collin and Denton counties, and the Census Bureau puts the median owner occupied home value at about $642,000, among the highest in the area. That means large homes, often with one system upstairs and another downstairs, and a lot of houses whose original equipment went in during the same stretch of years.
What Frisco's green building ordinance means for your system
Frisco adopted a residential green building program in 2001. For single family homes with permits filed after June 30, 2007, the amended rules required ENERGY STAR performance, among other things.
Tested homes
Homes under the amended program had to score 83 or lower on the HERS index, a rating of energy use, with each house tested by an accredited inspector. A tighter, better insulated house usually needs less cooling capacity than an older home of the same size.
Sealed ducts
The rules called for duct joints sealed with mastic. When a technician finds the house will not cool, the ducts are less likely to be the first suspect, which points the search toward the equipment, airflow settings or the drain.
A thermostat on every floor
Each story needed at least one programmable thermostat. If one floor is hot and the other is fine, the problem is often limited to the system serving that floor, so tell the line which floor is affected.
Fresh air requirements
The program also required indoor air quality compliance with ASHRAE Standard 62.2, which deals with ventilation. Some homes have a fresh air duct or a ventilation fan tied into the HVAC system that should be checked during service.
Not every Frisco house falls under these rules. Homes permitted before mid 2007 followed the earlier version of the program, and the program's rules may have changed since. Treat this as a reason to ask questions, not as proof of what is in your attic.
Two electric companies and two gas companies in one city
Frisco's resident guide lists CoServ for electricity and Oncor for outage reporting, plus both CoServ and Atmos Energy for gas. CoServ is a member owned cooperative. In Oncor territory, you pick a retail electric provider and Oncor maintains the lines. A news report on an Atmos rate increase that took effect October 1, 2026, said CoServ Gas serves about 72 percent of Frisco's gas customers and Atmos about 28 percent, and that the increase applied only to the Atmos customers.
Why this matters for heating and cooling: the outage number, the gas emergency number and any efficiency incentive depend on which companies serve your address. Oncor's Home Energy Efficiency program, for example, is only for homes that get power through Oncor's lines. CoServ members should ask the co-op what it offers. Write both numbers on the inside of the furnace closet door so they are there when you need them.
When one floor of a Frisco house stops cooling
Many Frisco homes have two separate systems, and when only one floor is warm, a few safe checks help you describe the problem clearly.
- Check that floor's thermostat. Make sure it is set to Cool, set below the room temperature, and has working batteries if it uses them.
- Find that system's filter. Upstairs systems often have their return grille in a hallway ceiling. A clogged filter can cut airflow enough to freeze the coil.
- Look at the right outdoor unit. Note whether its fan is spinning and whether grass clippings or leaves are packed against the coil. Clear debris by hand with the power off at the thermostat.
- Check one breaker. If that system's breaker has tripped, reset it once. If it trips again, leave it off.
- Look at the drain. Attic units often have a float switch that shuts the system off when the pan fills. Water in the pan or a dripping secondary drain line over a window is worth mentioning on the call.
Tell the line which floor is warm and what you saw outside. That detail helps the company you are put through to arrive with the right parts in mind.
Permits and codes in Frisco
Frisco updates its building codes regularly. The city adopted the 2024 International Residential Code and 2024 International Mechanical Code, both with local amendments, effective March 1, 2026, and the 2024 energy code effective June 2, 2026. Mechanical contractors must register with the city's Building Inspections division, and Frisco verifies state licenses with agencies such as TDLR as part of that registration. Building permits are applied for online through the city's Plans and Permits portal. For a replacement, ask the company to show the permit on the written quote.
Why Frisco homeowners call the line
No need to sort out the utility map first
CoServ or Oncor, CoServ Gas or Atmos, the HVAC call starts with the same free number. Your ZIP code is what routes the call to an independent company serving Frisco.
Two systems, one call
Say which floor or which system is failing when the assistant asks what is wrong. The assistant can include it when it briefs the company ahead of the transfer.
Any hour, at no charge
The line answers around the clock, including weekends and holidays. The call is free; money changes hands only between you and a company you decide to hire.
A way to check the company
Frisco itself checks state licenses when contractors register. This site shows you how to look up the same TDLR license number before any work starts.
Services Frisco homes ask about most
Most summer calls are for AC repair, often on just one of a home's two systems. When a system quits on a weekend night with a full house, see emergency AC repair for what to do while you wait. Homes from Frisco's 2000s boom are reaching the age when owners weigh AC replacement, and newer homes benefit most from a yearly tune-up that keeps warranty paperwork and drains in order. Whether your heat comes from a gas furnace on CoServ Gas or Atmos, or from an electric heat pump, furnace and heating repair explains what to check first on a cold morning.
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 Frisco 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 Frisco
All the Dallas-Fort Worth cities the line covers: