Technician in work gloves reading a gauge manifold hooked to an outdoor air conditioning unit next to a flower bed

AC Repair in Houston: What Your System Is Telling You

Air conditioner quit, short cycling, or blowing air that is barely cool? Sort out the symptom here, do the safe checks, then call the free line any hour to reach an independent Houston-area HVAC company.

Call (832) 662-4107 Match your symptom

When you need AC repair or air conditioner service in Houston, the first job is figuring out what kind of failure you have. A system that will not start, one that runs but cannot keep up, and one that is leaking water are three very different problems. This page helps you narrow it down, do the checks that are safe for a homeowner, and know what a proper diagnostic visit should include before you pay for one.

Houston Air & Heating is not a contractor. It is a free phone line answered at any hour by an automated assistant. You say what the system is doing and which part of the Houston area you are in, and the assistant hands the call to an HVAC company that is independent and locally owned. That business sends the technician, prices the repair and bills you directly.

Why Houston air conditioners break when they do

The cooling season here is long and it does not let up. Under the 1991 to 2020 climate normals, the normal daily high at Bush Intercontinental sits in the low to mid 90s through most of June, July and August. Actual summers often run hotter than the averages: the National Weather Service Houston/Galveston office counted 145 days at or above 90 degrees in 2025, beating the old record of 142 set in 2011.

That means months of near continuous run time, and Gulf Coast humidity adds a second load: the system has to pull water out of the air, not just heat. The U.S. Department of Energy notes that electrical controls can fail from frequent on and off cycling and from corroded wires and terminals. Drain lines carry water every day for months. When something gives out, it is usually one worn part that finally failed under load.

Technician reading pressure gauges attached to an outdoor condenser beside a brick home and wood fence

One thing that is not a breakdown: on the hottest late afternoons a healthy system may fall a degree or two behind the thermostat, then catch up after sunset. If the air from the vents feels clearly cold and the house recovers overnight, that is usually normal for a Houston August.

Houston AC repair triage: symptom, likely cause, safe check

Use this table to describe the problem accurately when you call. It does not replace a diagnosis: only a technician with meters and gauges on your equipment can confirm which part failed.

Air conditioning symptoms, what they often point to, what a homeowner can safely check, and what a technician tests
What you notice	Often points to	Safe check for you	What a technician tests
House is warm, vents blow mild air	Choked filter, iced indoor coil, outdoor fan stopped, refrigerant leak	Thermostat on Cool and below room temperature; look at the filter	Airflow, then fan and compressor operation, then the refrigerant charge
Thermostat calls for cooling, nothing happens	Tripped breaker, dead thermostat batteries, drain safety switch, control fault	Fresh batteries; reset a tripped breaker one time only	Power at both units, low voltage controls, the float switch
Outdoor unit hums, fan blade sits still	Failed start component or fan motor, compressor struggling	Turn the system off and leave it off	Electrical components against their ratings, motor and compressor draw
Frost or ice on the copper line	Poor airflow or low refrigerant	System off, fan on, let it thaw; replace a dirty filter	Blower and coil after thawing, then pressures and temperatures
Water at the indoor unit or a ceiling stain	Blocked condensate drain, cracked pan, failed float switch	System off, towels and a bucket down	Drain cleared and flowing, pan condition, safety switch
Short on and off cycles all day	Thermostat placement, electrical wear, charge problem, oversized equipment	Make sure the thermostat is not in sun or near a lamp	Cycle timing, controls, charge, equipment sizing
Breaker trips again after one reset	Electrical short in a motor, compressor or wiring	Leave the breaker off and call	Insulation and amperage tests before anything restarts

Safe checks a homeowner can do

Some no-cooling calls end with something simple. These steps never involve removing a panel, touching wires or handling refrigerant.

Read the thermostat. Mode on Cool, set a few degrees below the room, fan on Auto. A blank screen often just needs new batteries.
Pull the filter. If you cannot see light through it, put in a new one. A clogged filter cuts airflow, and the Department of Energy lists dirty filters among the most common causes of poor cooling.
Check the breakers. The indoor and outdoor units usually have separate breakers. If one has tripped, you may flip it back on a single time. If it flips off again, stop there: repeat trips mean an electrical fault.
Look at the outdoor unit. Clear leaves, grass clippings and overgrown plants from around it without reaching inside. Note whether the top fan spins when the system is calling for cooling.
Look at the indoor unit. Standing water in the pan or a float switch that has tripped can shut the whole system down on purpose. Note it for the technician.

Still warm after those checks? Call and describe exactly what you saw: the thermostat reading, whether the outdoor fan turns, any ice or water. That summary goes to the company you are put through to.

Call (832) 662-4107

If anyone in the house is elderly, very young or has a health condition and the indoor temperature is climbing, cooling them comes before the repair. The emergency AC repair page covers heat illness warning signs and how to keep people safe until help arrives.

What a good diagnostic visit looks like

A diagnostic visit is the technician's time spent finding the cause. You are paying for measurements, not a guess. A careful technician usually works in this order and tells you what the readings were.

Ask you what happened. When it started, what you noticed, what you already checked. Your notes save time.
Confirm airflow. Filter, blower, indoor coil and return air. Refrigerant readings mean little if the system is starved for air.
Test the electrical side. Components measured against their rated values, motors and compressor checked for proper current draw.
Measure the refrigerant side. Gauge pressures and pipe temperatures checked against the maker's charging data. A low charge always means refrigerant escaped somewhere, so the leak has to be located. Only a technician certified under EPA Section 608 may connect gauges or add refrigerant.
Check the drain. The condensate line flushed and flowing and any float switch tested, which matters a lot in Houston homes with the air handler in the attic.
Explain and price. What failed, why, what fixing it costs in writing, and anything else worth watching.

How long the repair itself takes

Many common fixes happen during the first visit if the part is on hand: a worn electrical component, a cleared drain, a replaced thermostat. A leak search can take longer because the technician has to trace the circuit. Big components, such as an indoor coil or a compressor, may need to be ordered and often take a separate trip. Attic work in summer is slow, hot work and can stretch the clock.

If you are told the part is days away, ask whether anything can get partial cooling going in the meantime, and whether the price changes if it arrives sooner.

Air handler with flexible insulated ducts in a residential attic above pink insulation

Before you approve the repair, ask

What is the visit or diagnostic fee?Get the number before anyone is dispatched, and ask whether it counts toward the repair.
What is your Texas ACR license number?Texas requires an ACR contractor license, issued by TDLR, for this kind of work. Look the number up yourself.
What did you measure?A technician who tested something can tell you the reading and show you the failed part.
Can I have the total in writing?Parts, labor and refrigerant, before the work begins.
If refrigerant is low, where is the leak?The EPA advises asking for leaks to be found and repaired rather than having a leaking system topped off.
Is this worth repairing at this age?If replacement comes up, ask for the repair price too. The repair or replace guide walks through the decision.

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.

For a closer look at how individual parts fail and what each repair involves, see the air conditioning repair guide to components. If the problem is a system that runs but will not cool, the AC not cooling guide goes deeper, and for drips and puddles there is the AC leaking water guide.

Fewer repair calls next summer

Change the filter on schedule through the cooling season. Keep shrubs, mulch and mower clippings away from the outdoor unit. Pick a steady setting: ENERGY STAR's thermostat guidance uses 78 degrees for the hours you are home in summer, and setting the thermostat far lower does not cool the house faster, it only keeps the system running longer. A spring HVAC tune-up, before the first heat wave, gives a technician time to catch a worn part while it is still a small job.

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.

Related services

Technician crouched beside an outdoor condenser next to a brick wall

Air Conditioning Repair

The parts of a central air system that wear out in Gulf Coast heat and humidity, what each repair involves, and when a repair stops making sense.

Technician walking to a service van in a driveway at dusk

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.

Two technicians servicing an outdoor AC unit beside a house

HVAC Tune-Up and Maintenance

How often to service an AC and furnace on the Gulf Coast, when to book it, and the filter and drain habits that matter most in humid heat.

AC repair across the Houston area

The same number works from Katy to Baytown and from Conroe down to League City. Every town page explains local details such as the utility, the county and typical housing.

Comparing companies before you hire one? Read how to pick a Houston HVAC company, which covers license checks and written quotes.

Common questions

How long does AC repair take?

It depends on what failed and whether the part is on the truck. Small electrical parts and a clogged condensate drain are often handled during the first visit once the problem is found. A refrigerant leak that has to be located, an indoor coil, a compressor, or any part that has to be ordered takes longer, sometimes several days. Ask the technician for an honest timeline before you approve the work.

Can I get AC repair today in Houston?

The phone line picks up at any hour and puts you through to a local, independently owned HVAC business. Whether a technician gets to you today depends on that business's schedule and how busy the season is. Before you hang up, ask for a likely arrival window and the visit fee.

Is Houston Air and Heating an AC repair company?

No. Houston Air and Heating only answers the phone for free and passes your call to a separate, locally owned heating and cooling business. That business sends a technician, sets the price and collects payment from you. It may pay the line a referral fee.

Should I keep running my AC if it is blowing warm air?

Do the quick checks first: thermostat on Cool, a clean filter, breakers on. If the air is still warm, or you see ice on the copper line, hear humming with no fan turning, or smell burning, switch the system off at the thermostat. Running a struggling system can turn a small repair into a compressor replacement.

Is air conditioner service the same thing as AC repair?

People say air conditioner service for both, so be specific on the call. If the system has stopped cooling, is leaking or is making a new noise, you need a repair visit, where a technician tracks down the fault and prices the fix. If it still cools fine and you want it checked before summer, that is a maintenance visit, covered on the HVAC tune-up page. The two are often priced differently, so ask which fee applies before anyone is sent.

How much does AC repair cost in Houston?

Prices come from the company doing the work, never from the line. The cost depends on the failed part, labor, how hard the equipment is to reach, refrigerant if a leak is involved, and whether the visit is after hours. The AC repair cost guide explains published ranges and what drives them. Always get the diagnostic fee and a written repair price before work starts.

AC down in Houston? Reach a local company now

One free call, any hour. Say whether it is the AC or the heat, where you are and what is happening, and the line transfers you to an independent, locally owned HVAC company that looks at the system and prices the job itself.

Call (832) 662-4107

Any hourAn automated assistant takes calls around the clock, including weekends and holidays.
No charge to youThe line never bills callers. Prices come only from the HVAC company.
Ask for the ACR licenseGet the company's Texas license number and check it on TDLR before work begins.
Your decisionYou hear the diagnosis and the price first, then choose whether to go ahead.