Rated 4.18 / 5 from 17 reviews
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A J Warren Services AJ Warren Service Company has been in business in Houston since January 15, 1973. Over the years we have established a reputation for quality and value unsurpassed in the air conditioning industry. We maintain a continuing quality improvement process in our company. We are completely and absolutely dedicated to your satisfaction.

AJ Warren has won the first place national Award for Excellence in Residential Contracting from the Air Conditioning Contractors of America. We are equally as dedicated to quality and customer satisfaction with our commercial customers. A. J. Warren Service Company is your best source for total indoor comfort and air quality solutions.
Services
Residential
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AJ Warren Service Company has been an American Standard Customer Care dealer for many years. We have installed hundreds of their systems for our customers. American Standard AC and heating equipment has proven to be very dependable. Our customers that have purchased new American Standard systems have been very happy with them.
Commercial
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A J Warren Service Company understands how important it is for a business to manage the costs associated with maintaining a comfortable indoor environment for employees, managers and customers. With high internal building loads and fresh air code requirements, this is can be a significant portion of a business' overhead. Let us provide your business with an HVAC expense business plan.
Thermostats
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The Ecobee thermostat has a touchscreen that uses a graphical user interface to guide an owner through establishing settings. Like other programmable thermostats, the Ecobee lets you set a schedule for what the temperature should be when you wake, leave the house during the day, return, and go to sleep. You can also set date and time ranges for vacation settings.
Indoor Air Quality
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We are the experts that can solve your IAQ problems. We would love to answer your questions and find out how we can help you. Please call. Did you know that the air you breathe indoors may be more polluted than the air outside? The Environmental Protection Agency has reported that indoor air pollution levels can be 100 times higher than the air outdoors.
Services
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A J Warren Service Company has the best NATE certified technicians ready to help you with anything related to Air Conditioning, Heating and Commercial Refrigeration. We repair, replace and provide maintenance for all brands of equipment. We design and install the best quality systems available. We are experts in Indoor Air Quality, Zone System and Controls. Call us today.
Reviews (17)
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Katie R.
Oct 05, 2021
AJ Warren has been our HVAC service provider for years. We are always pleased with the quality of their work and the caliber of service technicians. We would highly recommend AJ Warren to anyone with AC or heating issues. Services: A/C system maintenance, Install AC
Pb Wells
May 25, 2021
I can't say enough terrific things about Mark and his installation team. Mark was prompt with the estimate, fully answered all my questions, and patiently dealt with my elderly mother who was getting the new system. The team was professional, thoughtful, and completed the work on the day and time frame as promised. Hands down, this is the best AC/Heating company I have ever dealt with.
Bobby Ambrose
Nov 26, 2020
I hired A.J.Warren Service Company to replace my two 25 year old Trane systems. I could not have been more pleased with the experience. Everyone from Jay, Henry, Erik, and Jose and the entire team were very professional. They were courteous, punctual, hard working, and tidy. The installation was impeccable. As a retired HVAC person, I can appreciate a good installation and this one was one of those. Thanks again for a great job.
Jennifer Lee
May 10, 2020
I have, unfortunately had a lot of AC issues this year. AJ Warren has been AMAZING to work with. I worked with Mark and Tomas. They proposed repairs that actually worked and they were very responsive to questions and supportive with issues that have proven very difficult to resolve. I am extremely pleased with their service. I would highly recommend them for AC issues both big and small.
Sam Kiser
Nov 23, 2019
There not the top of the line a 1 year old unit making loud noise out side unit 22 days pass 1 year nstalled it wrongly maybe or this would not have fixed it but it did. There tech rep said the AC unit need to be screwed down to the pad. WHY WAS IT NOT DONE IN THE BEGINNING? Still wants $ 85.00 more dollars. I am not paying them to do the job right after the fact. Paid $6.358.00 And 85.00 TO find out IT'S not BOLTED DOWN. 5 trips back starting day 3 to remove rotten smell new AC was putting out. 4 weeks later it was fixed. NOT REAL HAPPY WITH SERVICE. THE AC WORKS really good that's why 3 stars.

So every once in a while even the best drop the ball on a lot of small items that as a customer seem bigger than the whole as it make you question the value of your work not personal just questioning the small details. The product is top quality without a doubt. Just many small things add up.
Trevor Clark
May 25, 2017
A different A/C repair company only wanted to replace entire unit due to its age. I sent them away and called AJ Warren. Alex at AJ Warren listened to my story, looked into the unit, and fixed it within an hour without using any parts. AJ Warren is now my go-to company for A/C repair and will be the first and only company I call when I inevitably need A/C work. Thanks for the great service Alex!
Randy D.
Jul 13, 2016
Willie is freaking awesome. I had called John Moore and they came out to look at our unit. John Moore did not even diagnose the problem, they immediately started trying to sell us a new system. Willie from AJ Warren came to our house and immediately knew what was wrong from my description of our problem. It was a simply bad switch that had burned out. Willie fixed it within 10 minutes and we had air again. I will always use these guys in the future.
C. J.
May 24, 2016
We've used AJ Warren's annual maintenance program for 10 years. This helped stretch the life of our old system which was installed by the home builder. When the time came for a new system, we chose AJ Warren after researching multiple companies and products. We chose AJ Warren because of the impeccable service we had received, coupled with their thoroughly documented quote and willingness to educate us on the differences in products & services available. Our experience has been great and we recommend them to everyone we know.
Joseph Paterson-Roberts
Nov 13, 2015
Over the years I have become used to other AC companies recommending replacement of the whole unit if it is older than 5 years, no matter what the actual problem is. With my last problem same again from two other vendors but when I called AJ Warren for a third opinion, they found the real issues and replaced only the parts that needed to be replaced for an honest, affordable and complete repair.
Joseph Paterson-Roberts
Jul 17, 2015
Over the years I have become used to other AC companies recommending replacement of the whole unit if it is older than 5 years, no matter what the actual problem is.
C. Johnson
Jul 15, 2015
We've used AJ Warren's annual maintenance program for 10 years. This helped stretch the life of our old system which was installed by the home builder. When the time came for a new system, we chose AJ Warren after researching multiple companies and products.
B. Thomas
Apr 23, 2015
Don't use, horrible experience with overcharging and lying, check the BBB instead of Angie's list, the screen their reviews, buyer beware.
Brooke R.
Mar 04, 2015
AJ Warren charged us $486 for a part that cost anywhere from ($46-$89 we called around different vendors in Houston with the model # of the part the tech replaced) plus labor. We've had a service agreement with them and have had work done in the past with no issues. The part that was replaced was also replaced by AJ Warren a year earlier (2 weeks past our parts & labor warranty).

When we called to speak with the owner, we were told they stand behind the price increase because they have to make a profit. I understand charging a mark up, but I feel this mark up was extreme and not a way to treat a returning customer. The company stands behind the mark up and has refused to adjust the price. The company also has quite a few complaints with the BBB for similar issues. We will not be using them again and filing our own complaint.
Mimi Houston
May 31, 2014
We are very happy to have installed the Lennox XC25 HVAC system by AJ Warren in October 2013. My husband and I live in the house, which was built in 1950s, with two dogs and four cats. Last summer our fifteen-year-old AC unit stated making high-pitched noises and it scares us since we can't be without AC here in Houston. My husband would have just dealt with the nation wide hardware store for the install using whatever they have.

But I wanted to buy the best one with the best dealer in town. So I started researching and picked 7 companies that are NATE Certified, ACCA members, and good reviews on the Internet. This is how I found AJ Warren. On their website, we saw the owner's comment about the introduction of his company on the first page. I understood how their technicians are well trained and it is good to know for the clients that they are hourly employees and not on commission.

After I talked with 7 dealers to get for a quote, I was very impressed Mark Yamaguchi of AJ Warren since he analyzed the comfort level of our house and wrote a 10 page report on how we can improve our comfort with some pictures of our ducts and grilles for air outlets. We talked and emailed each other over and over, and I sometime might have given him a hard time with captious questions.

He always replied to me. I now understand the importance of air circulation and duct sealing. Also how the dual stage or variable speed like XC25 works. To make the air circulate well we decided to install return air inlets in each room too. It took two and half days to finish everything since we asked them to do additional work such as 5 return air inlets, 2 new supply air outlets, duct insulation, wrap & seal, installing exhaust duct from exhaust fan to the outside, installing a kitchen duct from vent hood to outside roof jack, and disassembling and removing a whole-house fan in attic.

All their technicians worked very hard from 9am to 6pm and I didn't even realize if they took a break or went to lunch. They are all polite, friendly, and well knowledgeable. When they finished the installation they completely cleaned all the mess. I think it was truly win-win relationship between AJ Warren and I as a client since they could sell the best items that they have and I could buy the best items for what I need.

I am so glad I didn't deal with the lowest priced contractor. It is really correct to say, "You get what you pay for". The smell of this 55-year-old house is very good now. I feel as if we live in a new house because of good air circulation.
Mimi Houston
Oct 04, 2013
We are very happy to have installed the Lennox XC25 HVAC system by AJ Warren in October 2013. My husband and I live in the house, which was built in 1950s, with two dogs and four cats. Last summer our fifteen-year-old AC unit stated making high-pitched noises and it scares us since we can't be without AC here in Houston.
Seth R.
Sep 11, 2013
As an attorney of over 15 years, truth and candor are very important to me. I often spend the time to write positive reviews of businesses and rarely write a negative review. However, in this case the poor business practices of and abominable treatment provided to me by AJ Warren Service Company warrant the time and review. This is NOT about their technicians and I did indeed find Willie to be the consummate and knowledgeable professional and someone I would easily trust in my home without being there.

This is about the company's OWNERS and the profound disrespect with which they treated me when I had the "audacity" to express my dismay that the company charged me $450 for less than one hour of work. AJ Warren had serviced both of my residential air conditioning units a number of times before I contacted them to address a "gushing" sound coming from my vents that sounded like a windstorm inside my house.

The first technician, as nice as he was, was unknowledgeable of my system and believed it was one called an "iQ Drive" model that constantly changes speed. He left my home with a small service call charge not having corrected anything. My system then completely failed and I went to the attic to find that parts of my system from the technician's visit had not been replaced, including important protective covers for the circuit boards, and that the emergency shutoff sensor that prevents the system from running with the cover off was "taped off" so that it would run in the technician's presence even without the cover. AJ Warren then sent Willie, who had performed previous service at my home, and who immediately identified that the system was indeed failing by making the "gushing" noise because the motor was racing up and down in speed and also that the system was NOT the "iQ Drive" model his colleague misunderstood it to be. Willie advised that parts would be ordered under warranty and the system repaired.

To my dismay, when I called my wife after the parts arrived and Willie performed the repair, AJ Warren charged $450 for what was less than one hour of labor. I then called the company and spoke with Dwayne Ehlert, who, with A.J. Warren, III, owns AJ Warren. After I explained the prior course of dealing (including the mistake the first technician had made and the poor condition in which the unit was left) and requested an explanation as to how the charge was $450 since the parts were under warranty, Mr. Ehlert tersely responded, "How about I don't charge you and don't do business with you any longer." Unbelievably, Mr. Ehlert then told me that I should expect a lot more repair bills for my Maytag unit because it has one of the poorest reliability ratings in the industry. What's so unbelievable about that? AJ Warren showcases the Maytag system as one of their best selling products on their website! However, I suspect the company is generating serious revenue on repairs of these units that they so eagerly sell. Again, this is a company with very courteous technicians, but whose owners believe that IT IS THE CUSTOMER'S PRIVILEGE to do business with them and not the other way around.

Do not be fooled by the "window dressing" of Angie's List and BBB badges on the website, because if you dare seek to question a $450 hourly charge, you will be reprimanded and left searching for another servicing company.
Marilyn M.
Oct 19, 2012
Amazingly prompt and beyond efficient and courteous service! Very thorough and detail oriented without sneaking finding hidden or frivolous problems onto your bill. They walked me thru some tips to avoid the extra cost of a wkend/emergency service call and then *they called me* the moment they opened on Mon to schedule my appt. Willie is an amazingly kind man and does an outstanding job as my Service Tech. Wish I could give him and the company 50 stars!