Emergency Heating Service Katy, TX | 24 Hour HVAC Service

About Us

All makes and models | Heating and air conditioning service and repair

A customer-focused, family-run company, Alief Ultra Mechanical- Air Conditioning and Heating provide excellent service for AC service Houston-area residents with expert, energy-efficient heating and cooling solutions for year-round comfort. Because our business is built on referrals from satisfied customers, we make connecting you with the most dependable equipment and highest quality service our daily mission.

When you need work done on your heating replacement Houston, TX, HVAC systems, and HVAC contractors in Houston, TX or need to replace current equipment, the Ultra Mechanical And Alief team is ready to come to your aid, offering the solutions and furnace repair Houston TX that delivers maximum comfort and value.

Our Services

Heating

Air Conditioning

Indoor Air Quality

Ductless

Client Testimonials

Caitie R.

I’ve been with this company since 2007, and would never use another A/C tech. You won’t be sorry – I completely trust Heath and that’s super important Check Out Our Other Services: AC Repair Houston AC service Houston AC Replacement Houston Heating Replacement Houston TX HVAC repair Houston Furnace Replacement ...

Rebecca B.

They have an extremely helpful crew of people and are super easy to work with. The office answered all of my questions with no problem! Would highly recommend them for your heating repair Houston and AC repair Houston needs! Here are some other services: AC service Houston AC replacement Houston furnace ...

Mona Sellers H.

Best price and derive in Houston! Highly recommend this company. I have used them for years on AC repairs, correcting airflow, and yearly AC check-ups. They arrive on time and they are neat and clean. They are so professional and friendly. Recently had an entire unit go out and no ...

Lynn P.

This was our first experience using Ultra Mechanical, we had always used Alief Heating and Air for our HVAC repairs and maintenance for many years. We just requested a service call and a technician named (Tony) came out the following day and was on time and very thorough in his ...

Alaa J.

Edwin is very nice and professional, he explains what’s the problem and then he recommends what is best for you. Ultra Mechanical is where to go when you have an air-conditioning problem. You can check our other services: AC service Houston AC repair Houston AC replacement Houston Heating replacement Houston ...

Mayce E.

Edwin was the hero of the day! He was prompt and very friendly, he knew exactly what was the issue & fixed it in the same day he was very professional, we’ll definitely use his service again & we highly recommend him. Here are some other services to check: AC ...

Comly L.

Jeremy has been servicing our heating and air conditioning system for several years. He is very professional and provides excellent service. At Alief Heating and Air Conditioning, We offer heating replacement Houston TX at an unbeatable cost. Our main motive only is customer satisfaction. Here are some other services: AC ...

Diana C.

Jeremy is a very hard working man he works to get the job done his the best highly recommend Ultra Mechanical. If you are looking for AC repair Houston, then you can contact Alief Heating and Air Conditioning. We offer our services with proper skills and experience. Here are some ...

Bill J.

I have done business with John at Alief Air for the last 10 years and have always received 5-star service. I would highly recommend them. Here are some other services to check: AC service Houston AC repair Houston AC Replacement Houston AC Companies in Houston TX Furnace Repair Houston HVAC ...

Greg P.

This is a first class operation that stands behind their products and service. They are the only one i’ll call for my A/C needs. You can check our other services: AC Service Houston AC Replacement Houston AC repair Houston AC Companies in Houston TX HVAC repair Houston Furnace Repair Houston, ...

MsM G.

Jeremy is the best ac tech around and has been with this company for over 10 years. If you want the job done right call ultra mechanical!!! Here are some other services to check: AC Companies in Houston TX AC Repair Houston AC service Houston AC replacement in Houston Furnace ...

Janet S.

I have been highly satisfied with the service, quality, courtesy, and professionalism of Ultra Mechanical and am happy to see the new Alief merger! You can check our other services: AC Repair Houston AC Service Houston AC Replacement Houston AC Companies in Houston TX HVAC Repair Houston Furnace Repair Houston, ...

Mark L.

Edwin came out on a Sunday to replace a broken fan motor. He did it in a timely manner and was very friendly. Much appreciated. Check Out Our Other Services: AC Repair Houston AC Replacement Houston Furnace Repair Houston, TX HVAC companies Houston HVAC repair Houston Heating Replacement Houston, TX ...

Ayham C.

We had some issues with one of our A/C systems and techs from ultra mechanical came on time and got it fixed in less than an hour. I recommend this company for their professionalism. Edwin was very knowledgeable explaining the problem and its solution. At Alief Heating and Air Conditioning, ...

James H.

John has been servicing our units for several years. Always great service, calls to let me know he is on his way, explains if there are issues. Will continue to rely on John for our HVAC work. If you are looking for AC repair Houston, then you can contact Alief ...

Zsofia H.

John worked very efficiently and was extremely helpful throughout the process of fixing our air conditioner. He was knowledgeable and professional, showing care, respect, and expertise during our appointment. Check Out Our Other Services: AC companies in Houston TX AC replacement Houston AC repair Houston Furnace repair Houston, TX HVAC ...

Ammie C.

I was very please with Ultra Mechanical & Alief Heating and Air Condition. Their prompt service they gave my mother who is 90 years old was very much welcome. I really appreciate how they showed respect and courtesy to my mom. They made sure the problem was fixed and that ...

Ben E.

I am really impressed with the service received, we were using Alief Heating and Air before they merged with Ultra Mechanical, Edwin was thorough and professional and tuned up our aging system and fixed a problem we’d been having for a while now that other companies were not able to ...

Alex N.

Excellent Service. Kept us informed about when he would arrive. Arrived on time. Finished everything that we needed to be done. Check Out Our Other Services: AC Repair Houston AC Replacement Houston HVAC Contractors in Houston Heating Replacement Houston TX HVAC repair Houston Furnace Service Houston TX AC maintenance Houston ...

Rosemary N.

Best customer service of all the businesses I deal with! Reliable, responsive, friendly–from the person who answers the phone, to schedule, and then technician who comes to my home (usually John, THE best). You can check our other services: AC Replacement Houston AC Repair Houston AC service Houston HVAC contractors ...

Robert R.

Excellent service. Thanks, Edwin! Fast, courteous, professional. Great job. We’ve had the service plan for years. Thanks. Here are some other services to check: AC Replacement Houston AC Repair Houston AC service Houston HVAC repair Houston Furnace Repair Houston HVAC contractors in Houston Heating Replacement Houston TX AC maintenance Houston ...

Christina R.

Jeremy is very professional. And Knowledgeable. He is very good at what he does. I will only recommend Ultra Mechanical. If you are looking for AC repair Houston, then you can contact Alief Heating and Air Conditioning. We offer our services with proper skills and experience. Check out other services ...

Eric P.

The technician Edwin was great. Very professional and explained what he saw when checking our AC system. Thank you Ultra Mechanical. Here are some other services to check: AC repair Houston AC companies in Houston, TX AC replacement Houston Furnace replacement Houston HVAC repair Houston Heating replacement Houston, TX AC ...

Samantha A.

I recommend to request for John! He is always a pleasure and very informative. Quick and efficient. John is a rockstar!!! 😎 Check Out Our Other Services: AC Replacement Houston AC Repair Houston AC Service Houston AC Companies in Houston, TX Heating Replacement in Houston, TX HVAC repair Houston Furnace ...

Liz P.

John is brilliant and has been for years. I have always recommended them and everyone who has used them has been happy with their service. Could never recommend them enough. Check Out Our Other Services: AC Repair Houston AC Service Houston HVAC companies Houston AC Replacement Houston HVAC repair Houston ...

Richard T.

I’ve been using them for 15 years. Great service. On-time. Take care of me. No need to look for others. Check Out Other Services: AC Repair Houston AC service Houston AC Replacement Houston HVAC repair Houston HVAC companies Houston Furnace Repair Houston TX Heating Replacement Houston TX AC maintenance Houston ...

Charlie B.

I’ve used these guys for the last 9 yrs. huge house with two AC units. Hasn’t been without problems but John has always provided me an honest service and good prices. These are guys you can trust, congratulations guys – 1st as always. Check Out Other Services: AC Repair Houston ...

Terri N.

Highly recommend for A/C & heating service. Very responsive. Technicians are very professional and friendly. I have their service plan and have replaced a couple of systems with them. They are knowledgeable, fair & honest. At Alief Heating and Air Conditioning, We offer furnace service Houston, TX at an unbeatable cost. ...

Rene D.

Happy to see the merger of Alief Air with Ultra Mechanical. John with Alief Air has been our service technician for probably 20 years and has always been on time, friendly and most of all provided professional and proficient maintenance and repair of our HVAC systems. We certainly trust what ...

John S.

John and Edward came and checked all of our units out tweaked what needed to be tweaked and repaired one unit that was not working. As always, very professional and courteous. Great job guys and thanks. You can check our other services: AC Repair Houston AC service Houston AC replacement ...

Jiyuan C.

Our AC unit stopped blowing cold, and John came out just hours after the first call was made! Fantastic service, quick response, very transparent, and great results. My first call will always be Ultra Mechanical! Here are some other services to check: AC Repair Houston AC Service Houston AC Replacement ...

Patricia T.

We have used Alief Heating and A/C for 28 years ~ They have provided seasonal maintenance spring/fall every year with qualified and respectful service. Over the years they replaced our outdoor a/c unit and have worked on the furnace to keep it running without replacement. We have never had to ...

Melanie R.

Alief Heating and Air Conditioning has serviced our homes (plural) for about 20 years with the utmost professionalism and knowledge, but also kindness and understanding, at all times. Even now that we find ourselves in a brand new, ready-built home, Alief identified a flaw in our AC system that the ...

Michael Mc.

I’ve been using Alief Heating & A/C for over 10 years with no regrets. Whether it’s John or any other technician, I always get a knowledgable professional who knows exactly what to do. Most of the time it’s just routine maintenance. However, for the times that warrant repairs, I am ...

Tamara O.

Our company has been using Alief Heating and Air since 2008. We love John!! He is always great to work with and takes care of anything we need. Gibson’s Landscape Here are some other services to check: AC repair Houston AC maintenance Houston AC service Houston AC installation Houston AC ...

Kate K.

John is always prompt, professional, and helpful. Straight shooting and honest information are so helpful when dealing with A/C in these old homes. We trust Alief Heating & Air Conditioning for HVAC repair Houston. Check out our other service: AC replacement Houston AC repair Houston AC service Houston AC maintenance ...

Chris W.

We recently had an issue with our AC unit. Ultra Mechanical came at the appointed time and resolved the issue in a timely fashion. Very professional service. Would recommend them to anyone needing good service. Thank you Edwin. Check out our other service: AC repair Houston AC service Houston AC ...

Lyn F.

I recommend Alief to all my family and friends, and tell them to ask for John. I trust him completely. He has always taken such good care of us, and I know whatever he says to me is the best advice I can get anywhere. Great company, great guy! You ...

Art P.

I have used Alief for our AC and heating needs for almost 10 years now. They installed our system and have kept it in top notch shape. Mike and John really know what they are doing. They are always responsive and make sure that the work is done right. I ...

BK C.

I have used Alief heating & AC for years and they have repeatedly offered great services. One of our AC units was not working. John came on time and got the unit working promptly and performed regular maintenance on the other units too. As usual, John is knowledgeable, thorough and ...

Stephen S.

Fast and reliable service. Edwin was our technician for problems we were having with our AC and he was great to work with. Excellent customer service, he was able to quickly diagnose and take care of the problem. I would highly suggest using this company for all your needs. Check ...

P Krenek

Mike and John have been servicing our home and businesses for over a decade. They are courteous, prompt and honest. We are fortunate to know them. You can check out our other services: Heating replacement Houston TX AC replacement Houston HVAC contractors in Houston TX AC installation Houston HVAC repair ...

Michael N.

Called Ultra Mechanical last week to get the air conditioner serviced. They set an appointment for 9 am the next day. Showed up on time and thoroughly checked, tested and cleaned the air conditioners. We signed up for the yearly maintenance plan as they will come again this fall to ...

Jerry H.

Our service rep today was John who is a long time employee of the company and does such a superb job for us that we request his services every time there is a need or annual inspection. He has been doing this for almost 19 years for us and constantly ...

M Wilson

Every house we have ever owned in the Houston area, we have had Alief/Ultra maintain and service our heating and air conditioning. We have been a loyal customer for over 15 years and John has been so easy to work with. He is very knowledgeable and has saved us a ...

Jean S.

John has been coming out to our house for years. He does a fantastic job every time. We always ask for John. He is friendly. Answers all our questions. He is reliable and always on time. We just love John, he is part of the family. Here are our other ...

Paul E.

We have been depending on Mr. Holder for our cooling and heating needs now for over 23 years. We haven’t been disappointed to date. Service and maintenance have always been timely, thorough and fairly priced. Heath has always been friendly, courteous and very respectful of our property. We consider him ...

Juan R.

Edwin is a highly qualified technician and performs his tasks with absolute transparency and honesty. The job is well done and don’t leave loose ends to come by later as many others I have deal with in the pass. He have deep knowledge of his ditties Here are our other ...

Peter Z.

Ultra is great. I have been using them for about 5 years now and they are incredibly responsive. I just had my annual spring checkup and two guys came (i have 4 AC units), Edwin and Jeremy and they were very nice, efficient and capable. Great guys and their dispatch ...

Heather G.

My mom recently had her AC fan go out & this company came to the rescue! They set up a service time for the very next day, the serviceman (Tony) was punctual, polite, and willing to go the extra mile to help! They are always sure to keep your home ...

Shirley C.

Very efficient, they are able to come to fix my AC the same day. Which is important for me and my cats when it’s 105 F in this hot summer. They are very kind and helpful, I’ll definitely use them again in the future. Here are check out our other ...

Joseph E.

If you own a home, then you know what I am talking about. You are walking through your house and something just doesn’t feel right. Then you look at your thermostat and realize that your AC unit is not cooling. For a lot of people, this is cause for panic. ...

ED Houston, TX

“Thanks for a job well done. In addition to improving the air flow return, I also have more movement room in the attic. Thanks again.” Here are check out our other services: AC repair Houston AC service Houston HVAC repair Houston Furnace service Houston, TX AC replacement Houston Heating replacement ...

Charles Missouri City, TX

“This is my third experience with this contractor in purchase and installation of Trane products. I am very pleased with the quality of their work and the operation of the Trane products.” Here are check out our other services: AC repair Houston AC service Houston AC companies in Houston TX ...

Chris Katy, TX

“In my opinion, Ultra Mechanical is the most professional and knowledgeable A/C team I have ever worked with. Their knowledge and level of service should be a model to every contractor – in every industry. I can’t say enough about how much I value this level of service and quality. ...

Bill Kingwood, TX

“Ultra Mechanical did an outstanding job replacing our air conditioning units and furnace. I have never had such a positive experience with a service provider and I recommend their services to others.” You are check out our other services: AC repair Houston AC service Houston AC companies in Houston TX ...

Silkwood Houston, TX

When it comes to explaining why you should make Ultra Mechanical your HVAC service contractor, we think our clients say it best. “Ultra Mechanical is our contractor of choice. They always do an excellent job.” Check out our other services: AC repair Houston AC service Houston AC replacement Houston AC ...

Matthew O.

“Alief Heating & Air Conditioning is a family business that takes pride in their work. I first called them when my A/C broke in the middle of summer a couple of years ago. They were prompt, professional and incredibly reasonable with respect to price. Since then they have come to ...

J.B. Bennett

“I have known Mike, the owner, for more than 30 years. He shoots straight and he knows his business. He cares how the customer feels. He recommends high quality ac and heating systems. He put in both of mine and my parents systems, too. He and his employees are the ...

Don James

“I can’t say enough about this company’s service! They said they would be here between 1 and 3. The truck rolled up at 1:10. The technician, Mr. John Williams was very qualified and efficient. After 30 minutes, the unit was blowing cold air. The total time he was here was ...

Matthew Hardy

“A+ job!!! The HVAC system in our home had seen better days. All the components in the attic were 30+ years old, and the outside unit was about 18. Time for an upgrade to beat the Houston heat and save energy. The folks at Alief Heating & Air Conditioning did ...

Carolyn Broussard

“I had a Trane unit for 25 years (was still running), but wanted to replace the system while it was still working with another Trane. I received three bids. Two from large companies (they didn’t carry Trane units and the bids were for a smaller system than what I had) ...

Diane Leary

“As I was home during the day more during the summer, I noticed my a/c ran continually, and my house was never cool. At first I thought it was just the summer heat, but when I got my June electric bill, I knew I had a problem. I called Alief ...

Amanda Mize

“I came home for lunch and had realized my a/c had gone out. I called Alief Heating & Air Conditioning and they had someone out that afternoon. The technician, John, was very concerned about my comfort, and now my unit is working like it is new again. I will definitely ...

Marilyn Cassidy

“The folks at Alief Heating & Air Conditioning are awesome!” Check out our other services: AC repair Houston AC service Houston Furnace service Houston, TX HVAC companies Houston Heating replacement Houston AC maintenance Houston AC installation Houston

Allysion A.

“We have been using Alief Heating and Air since the early 80’s. We have never had an issue with the service and customer service is always wonderful. If you need work done on your AC repair Houston unit they are the place to call. They always explain what they are ...

TG Johnson

“ We used them last year for a new Trane and they were great. They did an excellent job protecting our home and the AC works great. Today we called for a service call on an older Trane and they sent a 20 year employee. He got us back up ...

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