Census data puts the median Arlington home at 1986. In those houses, an AC that runs but won’t keep up is often a mix of problems: an aging part, a leak, and a newer outdoor unit paired with an original indoor coil. Here’s how we sort it out, and what Arlington’s permit rules mean if repair turns into replacement.
AC not cooling in Arlington? Check these before you call
- Power. Oncor delivers electricity in Arlington. If the whole house is dark, check Oncor’s outage map or report it at 888-313-4747 before you call an HVAC company. An AC can’t run without power, and some systems wait before restarting after power returns, so give it a little time before you assume it’s broken.
- Condensate drain. Many systems have a float switch that shuts the AC off when the drain backs up. Water near the indoor unit is a clue.
- Ice on the lines. Turn the system off and let it thaw. Running it frozen can damage the compressor.
- Breakers. Check the breaker in the panel and the disconnect next to the outdoor unit. If a breaker trips again right after you reset it, leave it off and call.
- Air filter. A clogged filter cuts airflow and can freeze the indoor coil.
- Thermostat. Set to Cool, and below the room temperature. If it has batteries and a blank screen, replace them.
Still warm inside? Call 972-423-0012, any hour.
The AC repairs we see most
- Duct problems. A disconnected or crushed duct in the attic can make one room hot while the rest of the house is fine.
- Clogged drain line. Water at the air handler, or a float switch that shut the system off.
- Blower or fan motor. Weak airflow at the vents, or an outdoor fan that won’t spin.
- Frozen evaporator coil. Usually low airflow or low refrigerant.
- Refrigerant leak. Adding refrigerant without finding the leak only buys time. We find the leak and show you the options.
- Capacitor or contactor. The outdoor unit hums but the fan or compressor won’t start.
For more causes, see why your AC isn’t blowing cold air and signs your AC needs repairs.
Arlington homes and what their age means for your system
Arlington’s homes skew older than many DFW suburbs. Census data puts the median Arlington home at 1986, and more than half were built before 1990, which means plenty of attic ductwork that’s 35 years old or more.
The Census counts about 153,137 homes in Arlington. Here’s how they break down by decade built, and what that usually means for the HVAC system inside:
| Built | Share of homes | What we often find |
|---|---|---|
| 1950s–1960s | About 14% | 60 years or older. Many were built before central air was standard, so the ducts and equipment location were added or reworked later. |
| 1970s | About 19% | About 50 years old. Original ductwork is common unless it was replaced, and leaky duct joints in a hot attic cost cooling. |
| 1980s | About 26% | Arlington’s biggest decade. Most have replaced the outdoor unit at least once, but the indoor coil, furnace and attic ducts are often older than the condenser. |
| 1990s–2000s | About 32% | Many systems from this period ran on R-22 and are due, or past due, for replacement. |
The house’s age doesn’t tell you the system’s age. The data plate on the outdoor unit shows its model, serial number and refrigerant type, and that’s the first thing we read on a visit.
Mismatched equipment is one of the most common problems we find in older Arlington homes: a newer outdoor unit paired with an original indoor coil or furnace. The system runs, but it may never cool the way it should. On a repair visit, we’ll tell you if that’s what’s going on.
Arlington permits for HVAC work
- Inspections are required before work is covered up and when the project is complete. Replacing a minor part that doesn’t change the equipment’s approval is exempt.
- Every Arlington permit is applied for online at ArlingtonPermits.com, and trade work must be done by a person licensed in that trade.
- If mechanical is the only trade involved, it’s a stand-alone Mechanical Permit (MP). If the job also needs electrical or plumbing work, the City requires a remodel permit instead.
- The City of Arlington lists HVAC replacement as work that requires a permit.
Dallas Heating and Air Conditioning is registered with the City of Arlington as a mechanical contractor. For a replacement, we pull the permit and schedule the inspection, so you don’t have to.
Refrigerant and efficiency rules that affect your decision
R-22. Many air conditioners installed before 2010 use R-22. The EPA ended its production and import on January 1, 2020. An R-22 system can keep running, but it can only be recharged with recovered or reclaimed R-22, so a big leak on an old R-22 unit is often the point where replacement makes more sense than repair.
SEER2. Since January 1, 2023, Department of Energy rules require new split-system central air conditioners installed in the Southeast region, which includes Texas, to meet at least 14.3 SEER2 under 45,000 Btu/h and 13.8 SEER2 at 45,000 Btu/h and up. New split heat pumps nationwide must meet 14.3 SEER2. See SEER vs. SEER2.
New refrigerants. Under the EPA’s AIM Act rules, new home air conditioners and heat pumps are moving to refrigerants with lower global warming potential, such as R-454B and R-32. Read what the R-410A phase-out means.
How a Arlington repair visit works
- You call. We answer 24/7 and set a time that works for you.
- Diagnosis. A NATE-certified technician checks the thermostat, electrical, airflow, refrigerant and drain, and finds the cause rather than guessing.
- Written price. You get upfront written pricing before any work starts. If replacement makes more sense than repair, we’ll show you both.
- Repair and test. We fix it, then run the system and check the temperature drop across the coil.
- Follow-up. We tell you what we found and anything to watch for.
Why homeowners call us
- All major brands, including Carrier, Trane, Lennox, Rheem, American Standard, York, Daikin, Mitsubishi, Fujitsu, Amana, Bryant and Goodman
- Registered with the City of Arlington as a mechanical contractor
- Financing available
- Upfront written pricing before any work starts
- 24/7 service
- NATE-certified technicians
More for Arlington: HVAC service in Arlington, heating repair in Arlington, AC installation in Arlington. See also AC repair and HVAC maintenance and tune-ups.
Call 972-423-0012, open 24 hours.
