Why does my AC run all day in Houston?

In Houston, long AC runtimes can happen because of high heat, heavy humidity, poor insulation, dirty filters, low refrigerant, or an aging system that can no longer keep up. If your AC runs constantly but your home still feels warm or sticky, a technician can inspect the system and determine whether you need maintenance, repair, ductwork service, or replacement.

Can duct leaks make my AC feel weaker than it really is?

Yes. Leaky ducts can let cooled air escape into attics, walls, or other unconditioned spaces before it reaches your rooms. That can make your AC seem undersized or ineffective, even if the unit itself is working. Sealing or repairing ductwork can help more cooled air reach the living areas of your home.

Why is my AC stronger in the morning but worse in the afternoon?

Your AC may seem stronger in the morning because outdoor temperatures are lower and the system has less heat to fight. By late afternoon, Houston heat, sunlight, attic temperatures, and humidity can put more stress on the system. If your AC cannot keep up later in the day, the issue may involve airflow, refrigerant, insulation, ductwork, or system age.

What should I check before calling for HVAC service?

Before calling for HVAC service, check that the thermostat is set correctly, the air filter is not clogged, the breaker has not tripped, and the outdoor unit is clear of debris. If those items look normal and the system still is not working correctly, schedule service so a technician can diagnose the issue safely.

When is an HVAC issue urgent enough for emergency service?

An HVAC issue may need emergency service if your AC fails during extreme heat, your heater stops working during a cold front, the system is leaking near electrical components, or you notice burning smells, loud noises, or repeated breaker trips. Fast service can help protect your comfort and reduce the chance of further system damage.

What HVAC upgrades help older Houston homes feel more comfortable?

Older Houston homes may benefit from duct sealing, improved filtration, smart thermostats, indoor air quality products, updated insulation, or a properly sized replacement system. The best upgrade depends on whether the main issue is uneven cooling, high humidity, poor airflow, dust, or unreliable equipment.

Should I replace my AC before it completely fails?

Replacing your AC before it fails can make sense if the system is older, needs frequent repairs, struggles during hot weather, or causes energy bills to rise. Planning ahead gives you more time to compare equipment options, review financing, and avoid making a rushed decision during a Houston heat wave.

Can HVAC service help reduce dust and musty odors?

Yes. Dust and musty odors can come from dirty filters, duct buildup, duct leaks, excess humidity, or poor airflow. HVAC service can help identify whether your home needs maintenance, duct cleaning, duct sealing, improved filtration, or an indoor air quality solution.

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Houston HVAC Services

One Hour Air Conditioning & Heating® of Houston

4.7

(10586 reviews)

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HVAC Emergencies

Fast 24/7 emergency HVAC repairs to restore your comfort when you need it most today.
Air Conditioning

Reliable air conditioning services to keep your home cool and comfortable all year.
Thermostat Repair

Expert thermostat services for precise temperature control and maximum energy savings.
Ductwork

Expert ductwork services to optimize airflow and maximize HVAC system efficiency.
Indoor Air Quality

Comprehensive air quality solutions for healthier, cleaner indoor air in your home.
Heating

Professional heating services to keep your home warm and comfortable year-round.

Houston HVAC Services

Air Conditioning Repair, Installation & Maintenance

24/7 HVAC Service You Can Count On

Whether your air conditioner stops cooling in a Houston heat wave, or your heater refuses to turn on in winter, we’re ready to help, day or night. With transparent pricing, a satisfaction guarantee, and certified HVAC technicians, we keep homes comfortable year‑round.

Need immediate help? Don't wait in the heat or cold. Book your service online now for fast, reliable dispatch!

Comprehensive Heating & Cooling Services in Houston

We offer full‑spectrum HVAC services designed for Houston’s unique climate and home comfort needs.

Air Conditioning Services

AC repair for all major brands and models
New AC installation & replacement
Preventative AC maintenance to avoid breakdowns
Emergency cooling service available 24/7

Heating & Furnace Services

Fast, dependable heating system repair
Professional heater installation & replacements
Annual maintenance plans to improve efficiency
Thermostat diagnostics and upgrades

Indoor Air Quality & Duct Services

Air duct cleaning and sealing
Indoor air quality assessments
Dehumidifiers and air handlers to improve comfort

Emergency HVAC Services

Available any time, including nights, weekends, and holidays. We diagnose and fix urgent HVAC issues quickly so you’re never left uncomfortable.

Ready to restore your comfort? Skip the phone call! Use our easy online scheduler to pick a time that works best for you. Schedule your HVAC service online.

Why Choose One Hour Air Conditioning & Heating® of Houston for HVAC Services?

Local Experts with National Support - We combine local Houston service with the resources of a nationwide HVAC brand. Our technicians are trained, insured, and background checked.
Straightforward Pricing, No Hidden Fees - You’ll know your options and costs before any work begins. We believe in clear communication and honest service.
On‑Time Guarantee - We show up when we say we will, or you don’t pay your service fee. Prompt service matters.
100% Satisfaction Guarantee - Materials, labor, and craftsmanship are backed by our warranty so you can feel confident every time.

Don't let a broken AC or heater disrupt your day. Experience prompt, professional service from Houston's trusted HVAC experts. Lock in your appointment online.

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Hours of Operation

We are available 24/7 to take your call for emergencies. For all other services, our appointment hours are:

Monday

24 hours

Tuesday

24 hours

Wednesday

24 hours

Thursday

24 hours

Friday

24 hours

Saturday

24 hours

Sunday

24 hours

Special Offers

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$89 AC Tune-Up

with Breakdown Free Guarantee

Regular price: $149. Breakdown-Free Guarantee valid for 6 months from date of service. Recommended repairs must be completed at time of service.

Expires: August 31, 2026

Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply.
Free Second Opinion

On System Replacement

Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply.
$50 Off

Any Repair

Service fee may apply. Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply.
10% Off

Indoor Air Quality Products

Expires: July 31, 2026

Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply.
Seal Your Air Ducts & Get 50% Duct Cleaning

Expires: July 31, 2026

Valid at participating locations. Limit one coupon per household. Coupon must be presented at time of purchase. Cannot be combined with any other offers or discounts. Some restrictions, taxes and fees may apply.
$1776 off Full System Replacement

4th of July

Expires: July 31, 2026
$76 off Repairs

4th of July

Expires: July 31, 2026

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Why Choose One Hour Air Conditioning & Heating® of Houston for HVAC Services?

Experience the One Hour Air Conditioning & Heating® Difference

Local Experts with National Support - We combine local Houston service with the resources of a nationwide HVAC brand. Our technicians are trained, insured, and background checked.
Straightforward Pricing, No Hidden Fees - You’ll know your options and costs before any work begins. We believe in clear communication and honest service.
On‑Time Guarantee - We show up when we say we will, or you don’t pay your service fee. Prompt service matters.
100% Satisfaction Guarantee - Materials, labor, and craftsmanship are backed by our warranty so you can feel confident every time.

We have a reputation for being punctual, friendly and knowledgable

4.7

(10586 reviews)

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It's not like your A/C unit breaks all the time and you already know all the great repair and service firms. So, I looked up their reviews and the competition and saw similar reviews. What separated this company was their BBB A+ rating and I could see why in the technician that came to my house. David, asked me the right questions, understood that I knew what the cause was and I wanted a solution. Dave was about to tell me several options they provide, and I told him just give me the right solution, so I don't have this problem again. I got the solution I was expecting and signed up for them to execute the solution. David was great to work with and was very knowledgeable. I would definitely call on them again, but hopefully I will not have to.

Code Blue (Codeblue009)

a week ago

I highly recommend Ricardo for any AC maintenance or tune-up service. He was extremely professional, knowledgeable, and friendly throughout the entire visit. Ricardo took the time to thoroughly inspect the system and clearly explained everything he found in a way that was easy to understand. What I appreciated most was that he was honest, patient, and willing to answer all of my questions without rushing. He made sure I understood the condition of my AC system and provided helpful recommendations to keep it running efficiently. It’s clear that he takes pride in his work and genuinely cares about his customers. If you’re looking for someone reliable, professional, and thorough, Ricardo is the person to call. Excellent service from start to finish!

James Gonzales

a month ago

Customer service: great. Scheduling: great Updates on where you are in the queue: great Have questions? Get answers fast. Linnell is amazing. Great guy. Talked us through what he was doing and what our next steps are. No hidden prices or gotchas and most importantly, my house is cooling again! Thank you all for your help!

Jeff Mechler

a month ago

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Meet the Houston Team

Jimmy Sanchez

General Manager

Jimmy Sanchez is our General Manager in Houston. He started his HVAC career with One Hour after retiring from the U. S. Marine Corps with 28 years of active service in 2016. Jimmy is an avid supporter of military events and now leads the military recruiting efforts and the One Hour Honors Veteran chapter. A Veteran program with a purpose to lead and inspire action toward honoring and helping US Veterans, military members , and their families. He makes the welfare of his employees his top priority. His favorite part about his job is seeing his employees reach their professional and personal goals as well as communicating how they can meet or exceed their customers’ goals and expectations. He feels his team has passion and is committed to ensuring outstanding customer service. In his spare time, Jimmy enjoys golf, fishing and spending time with his family.
Ursula White

Service Manager

Ursula White serves as the Service Manager, ensuring all runs smoothly in the One Hour office. Ursula, a native of Dallas, has been with the company for 15 years. She has been happily married for 8 years and has 5 beautiful children. When not in the office, Ursula enjoys playing the saxophone, enjoying time with family and being outdoors.
Bill Saillant

Parts Manager

Bill Saillant is a first-generation HVAC expert who has worked at One Hour Air Conditioning & Heating for over 49 years. Bill started his career in air conditioning and heating services after graduating from technical high school, and he has been a part of the HVAC industry ever since. One of Bill’s favorite things about his job is helping his customers. He is also passionate about working with his One Hour team. Bill’s success story resonates with many young people who feel college is out of reach or not the right fit for them. Technical high school helped pave the way for Bill’s future and can be a great option for many people interested in starting a new career.

HVAC Near Me In...

One Hour Air Conditioning & Heating® of Houston services the following communities:

Houston
Conroe
Cypress
Katy
Hempstead
Cinco Ranch
Greater Heights
Memorial
Richmond
Seabrook
Spring
Stafford
Galveston
Tomball
League City
Magnolia
Alief
Alvin
Angleton
Bacliff
Barker
Baytown
Beasley
Bellaire
Brazoria
Brookshire
Channelview
Crosby
Damon
Deer Park
Dickinson
Freeport
Fresno
Friendswood
Fulshear
Galena Park
Highlands
Hitchcock
Hockley
Huffman
Humble
Huntsville
Kemah
Kingwood
La Marque
La Porte
Lake Jackson
Manvel
Missouri City
Mont Belvieu
Montgomery
Needville
New Caney
Orchard
Pasadena
Pearland
Pecan Grove
Pinehurst
Port Bolivar
Porter
Rosenberg
Rosharon
San Felipe
Santa Fe
Seabrook
Sealy
Simonton
South Houston
Sugar Land
Texas City
The Woodlands
Waller
Wallis
Webster
West University
Willis

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