What Our Customers Say

"Jeremy Cisneros was awesome! So appreciative of him and taking great care of our unit."

"Leo arrived earlier than expected and did a fantastic job. Have used this company for years and believe them to be honest and reliable and reasonably priced. Ask for Leo!"

"We have worked with Heath and his exceptional service people since 2002, and across three properties - we would not use anyone else for HVAC service. In Houston where AC is critical, they never failed…timely, reliable and conscientious. First met Heath when we moved into a new property in 2002 when it turned out a switch we didn’t know about had been flipped turning off our downstairs AC - Heath showed us, flipped the switch and said ‘have a nice day’ - no service fees - just a thoughtful human being who didn’t take advantage. Over 24 years, we found their service and thoughtfulness has never changed. Even when we sold our last property last year - they were still supporting us through the insane inspection process, going over and above. Our last invoice $0. There are good companies and then there are great companies…. Heath and team are definitely the later. 10/10 highly recommend."

"Alief Mechanical performed above and beyond when it came to our new HVAC installation! Thank You!"

"Leo Francisco was very professional and helpful. He arrived early! He checked our AC and replaced all the filters. He did a great job!"

"Highly recommended. I have been using Alief Ultra Mechanical for over 10 years. Referred by a friend with multiple rental properties. AUM has always been professional, courteous and timely in resolving HVAC issues regardless of the repair scope. I trust their repair/service recommendations."

"This is a first rate HVAC Company that I have been using for years. The service is superb. From the office staff taking my call to the mechanic coming into my home everything is one smooth process. Especially outstanding are Stacy and John. They are always willing to help me in any way they can. I highly recommend Alief Ultra Mechanical."

"Excellent Company! John Wilson is always professional, friendly, and provides top-notch service. Honest diagnosis and quick repair! 5 Stars"

"Impeccable service. Crews are always on time and wear shoe protectors. They installed 3 systems in my new home. As a builder, I found working with them extremely easy and I was confident that their knowledge and experience was worth every penny paid. As a customer, they respected not only my time, but my home as well. Their attention to detail is pretty remarkable. Definitely using them in my next build."

"My apologies to Alief Ultra. I was told Stacey would call me back. I didn’t realize she was out of office."

"Outstanding service from start to finish by Leo (Routine HVAC maintenance check 2 units). He arrived early for appointment, but only by checking to see if convenient first. He was courteous and professional upon arrival and even wore shoe covers to keep our home clean. He was friendly, knowledgeable, and took the time to answer all of my questions with patience and clarity. It’s rare to find someone who combines technical expertise with such a personable approach. Highly recommend for anyone looking for reliable HVAC service!"

"Fantastic experience. I worked with John who is just the best! Our A/C unit was old and we were starting to have problems with it so I got 3 estimates from different companies to replace the unit and we really liked everything about the Alief estimate as well as liking John's presentation. He explained everything to us and the crew that installed the unit was great and friendly and polite. I had a question and called them last night after hours and within a few minutes someone called me back. And first thing this morning someone called me and told me John would be at my house between 9 and 9:30 to make a minor adjustment and he was here right on time. They are quick to respond and great to work with. The A/C is really nice and has features that my old one didn't have. We are totally happy with our experience with Alief Ultra Mechanical."

"Leo Francisco was great. He arrived at specific time. He was courteous and prompt. He explained the issue to me. I am so grateful. He did a great job. Highly recommend."

"Called on Sunday afternoon when AC quit cooling and they were here within a couple hours. Leo quickly diagnosed the issue after checking all 3 systems. Extremely professional and he explained the issues in easy to understand terms. Could not have been more pleased with the level of service and professionalism."

"I’ve known this company for the past 22 years and they have taken care of my HVAC system I would not trust anyone else. Top notch service, they take great care in making sure your home is left clean when they leave Jeremy is the best, he has gone above and beyond when he comes to servicing my system I would recommend them to anyone Thanks"

"Leo was prompt and on time. Checked everything and changed my filters! Great service!"

"We have been using Alief Ultra Mechanical for nearly 20 years, and they have installed both our Trane HVAC units and replaced both furnaces in the last 10 years. The service and communication are excellent, and they are very fair. Thank you, John Williams, for all these years of great service. Best regards - Chris S."

"Amazing service by Leo Francisco! Highly recommend him and his team."

"Jeremy has been servicing my units for years. He is incredibly professional, knowledgeable and kind. Alief Ultra Mechanical is the best!"

"Jeremy came out to service both of my units and I don't believe you could find a more competent and pleasant service tech. He explained everything of what he was doing and why and what I should be on the lookout for. I highly recommend Jeremy for any of your air conditioning service needs. This is the second or third time he's serviced our units."

"We have been using Alief Ultra Mechanical for many years. In our experience, they have always been responsive, professional and caring. We had a new upstairs A/C unit installed last year and the new system has worked great. We did have an issue with mice chewing up the wiring for the temperature sensors outside in the condenser. Our primary tech, Jeremy, knew how to solve this for us. Hours after completing that repair, we experienced a sudden loss of A/C with the downstairs unit, just as the temps outside were getting up to 100ºF. Ultra Mechanical got Jeremy out the same day. He diagonosed the issue, and it wasn't the A/C. Turned out that the Generac SMM module had failed. So we had to get our electrician out to replace that unit. Jeremy stayed in touch with us throughout to be sure we got our A/C back on line before the weekend. Observing Jeremy service our units, he strives to make his repairs and adjustments the right way, not taking short cuts that could lead to future issues. Jeremy also gives clear explanations on what he's doing and solid advice on the care of our system With support by service professionals like Jeremy and their customer focused office staff, Alief Ultra Mechanical remains our go to provider for our A/C system."

"Best AC/heating company! Always respond quickly and professionally."