HVAC and Furnace Tune Up in Dallas: What Spring and Fall Checks Cover

An HVAC tune up in Dallas is a short visit with a long reach. A system that cools hard from May into October and then switches to heat for a few sharp winter weeks wears out small parts steadily, and most of them give some warning first: a weak capacitor reading, a coil caked with pollen and dust, a drain line starting to slime over. A good spring AC check and a fall furnace tune up catch those while the fix is small and the schedule is open. This page explains what a proper tune-up covers for cooling and for heating, what it does not cover, the habits that matter between visits, and how to spot a visit that is really a sales pitch.

Dallas Air & Heating does not do tune-ups. It is a free phone line. Call (469) 649-7066, tell the automated assistant it is for maintenance, and give your name, callback number, city or ZIP and what kind of system you have. The call is transferred to an independent, locally owned heating and air conditioning company, which books the visit, does the work and bills you directly.

What a real HVAC tune-up in Dallas includes

The phrase "tune-up" covers two very different visits. One is a quick look: the filter gets a glance, the outdoor unit gets sprayed, and a sticker goes on the cabinet. The other takes measurements, compares them with the numbers printed on the equipment and writes them down. Only the second tells you anything.

There is a national yardstick for the second kind. The Air Conditioning Contractors of America (ACCA) publishes ANSI/ACCA 4 QM, Maintenance of Residential HVAC Systems, which ACCA describes as a manufacturer-endorsed set of minimum tasks for a maintenance inspection. It was reaffirmed by ANSI in 2024 and is a free download. ACCA notes it gives homeowners a baseline for judging whether a recommended repair really answers something the technician found. ENERGY STAR publishes a shorter version of the same idea, and the table above follows it.

Why the measurements matter

A capacitor (a small part that gives the motors their starting kick) can look fine and still test weak. A contactor (the switch that turns the outdoor unit on) can be pitted inside. A refrigerant charge that is slightly off still cools, just less well. None of that is visible from the yard. A technician with a meter and gauges can find it in minutes, and a written reading lets you compare this year with last year.

It also protects you. If the company recommends a repair, ask which reading points to it, what the normal value is, and what yours showed. A good technician will answer without hesitation.

What a tune-up does not include

Knowing the limits keeps the visit honest on both sides. A standard tune-up is an inspection and cleaning, not a repair. Expect these to be quoted separately if they come up:

• Parts. A failed capacitor, contactor, motor or igniter found during the visit is a repair with its own price.
• Refrigerant. Adding refrigerant is not routine. If the charge is low, there is a leak, and finding it is a separate job.
• Deep coil cleaning. A rinse of the outdoor coil is common. Pulling and chemically cleaning an indoor coil often costs extra. Ask in advance.
• Duct work. The DOE lists checking and sealing duct leaks as part of professional service, but sealing ducts in a hot attic is usually its own project.
• Air quality add-ons. Ultraviolet lights, whole-home purifiers and duct cleaning are products, not maintenance. Decide on them separately.

Filters: the small habit with the biggest payoff

The single most useful thing you can do between visits costs a few dollars. ENERGY STAR says to check the filter every month, especially in heavy-use months, change it if it looks dirty, and change it at least every three months no matter what. The U.S. Department of Energy says that replacing a dirty, clogged filter with a clean one can cut an air conditioner's energy use by 5 to 15 percent.

North Texas gives filters plenty to catch. Children's Health in Dallas lists mountain cedar pollen from December to February, tree pollen such as elm, oak and pecan from February to June, grass pollen from March to September, ragweed from August to November, and mold all year with a late-summer peak. That leaves very few months with nothing in the air. Add pets, construction dust from new building nearby or a house that stays closed up all summer, and a monthly look is not overkill.

Write down the filter size printed on the frame and keep a spare on hand. Higher-rated pleated filters catch finer particles but can restrict airflow on a system that was not designed for them, so ask the technician during the tune-up what rating your blower and return can handle.

The condensate drain and the outdoor coil

Every air conditioner pulls water out of the air, and that water has to leave through a small drain line. In warm, humid weather the line can grow slime and clog. The DOE notes that a blocked drain reduces the system's ability to control humidity and can leave moisture that discolors walls or carpet. Many systems have a float switch that shuts the cooling off when water backs up, which is a nuisance but better than a ceiling stain. A spring tune-up should include checking the drain, the pan and that switch. Between visits, find where the line ends outside and confirm it drips while the AC runs on a muggy day.

The outdoor unit sheds the heat your house collects, and it needs open air to do it. The DOE recommends trimming plants back at least 2 feet from the condenser. Grass clippings, leaves and seed fluff all collect on the fins. Cottonwood fluff is a known culprit in late spring: one HVAC owner quoted by House Digest explains that a coil plugged with it runs at high pressure and makes both the fan motor and the compressor work harder. Keep the area clear and point the mower discharge away from the unit. Leave anything beyond a gentle look to the technician.

Furnace tune up: gas furnaces, heat pumps and the fall check

The fall visit is about safety as much as comfort. The U.S. Consumer Product Safety Commission recommends a yearly professional inspection of all fuel-burning heating equipment, including furnaces, water heaters, flues and vents, because faulty equipment can leak carbon monoxide. The CPSC also recommends carbon monoxide alarms on every level of the home and outside sleeping areas. If a CO alarm sounds, get everyone outside and call 911. If you smell gas, leave right away and call from outside: Atmos Energy, which supplies gas to much of North Texas, lists a 24-hour emergency line of 866-322-8667, or call 911.

Heat pumps need the fall check too, even though the same outdoor unit already had its spring visit. In winter it runs in reverse, relies on a defrost cycle to melt frost off the outdoor coil, and leans on electric backup heat when it gets very cold. The DOE says the gap in energy use between a well-kept heat pump and a badly neglected one can be 10 to 25 percent. North Texas winters are short but can be severe: during the February 2021 winter storm, the National Weather Service recorded minus 2 degrees at DFW Airport and 139 straight hours at or below freezing. That is not the week to discover the backup heat does not work.

Warranty paperwork and maintenance records

Equipment warranties vary by manufacturer and model, so the certificate that came with your system is the only real answer. Two general points are worth knowing. First, some manufacturers require you to register the equipment within a set window after installation to get the full warranty term; one major manufacturer, for example, ties its longer parts term to online registration within 60 days of installation. Second, many warranties cover defects "under normal use and maintenance," which is a good reason to keep every tune-up invoice with your installation records.

You also have rights. The Federal Trade Commission says companies generally cannot void a warranty or deny coverage just because you used a part made by another company or had service done by someone not associated with them, unless that part or service is provided free under the warranty. They can deny coverage for damage the outside part or service actually caused.

Simple checks you can do between visits

None of these involve opening the equipment, touching wiring or handling refrigerant or gas parts. Those belong to a technician.

1. Filter. Look at it monthly, change it when it is dirty and at least every three months.
2. Outdoor unit. Keep 2 feet clear around it. Remove leaves, clippings and fluff from around the base.
3. Drain. On a humid day, confirm the condensate line drips outside while the AC runs. Water in the indoor pan with a dry outdoor line means call.
4. Vents and returns. Keep furniture and rugs off them. Starving the system of air can freeze the indoor coil.
5. Thermostat. Replace batteries once a year and confirm the mode and schedule fit the season.
6. Alarms. Test smoke and carbon monoxide alarms when you change the clocks, which is also ENERGY STAR's suggested reminder for booking the seasonal checkups.

Maintenance plans: what to ask first

Many HVAC companies sell yearly agreements that bundle the spring and fall visits. The line does not sell plans and does not vouch for any company's terms. Before you sign one, ask which checklist each visit follows, whether you get readings in writing, whether it covers every system in the house, whether coil cleaning is included, what exactly is discounted, and whether it renews automatically and how to cancel. A plan is a scheduling convenience, not a promise that nothing will break.

1. Call any hourAn automated assistant answers (469) 649-7066 and asks whether it is about cooling or heating.
2. Describe the problemGive your name, a callback number, your city or ZIP and what the system is doing.
3. Get put throughThe call goes to an independent, locally owned heating and air conditioning company, which hears a short summary before it picks up.
4. 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.

Tune-ups across Dallas-Fort Worth

The line takes maintenance calls from Dallas and the cities around it. Each area page covers what is local, from the electric and gas utilities to the age of the housing.

• All Dallas-Fort Worth service areas
• McKinney
• Frisco
• Plano
• Allen
• Richardson
• Garland
• Mesquite
• Irving
• Carrollton
• Lewisville
• Flower Mound
• Denton
• Fort Worth
• Arlington
• Grand Prairie

Guides and next steps

• How to Choose an HVAC Company in Dallas
• Free AC Refrigerant Guide (PDF)
• Emergency AC Repair (24/7)