Rated 4.91 / 5 from 23 reviews
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Desert Diamond Mechanical You can depend on Desert Diamond Mechanical Heating & Cooling of Phoenix, Arizona for your home or business's HVAC needs. Contact us at any time for information about our HVAC services or to schedule an appointment. We provide heating and cooling services in Phoenix and surrounding communities, including Glendale, Sun City, Goodyear, Carefree, and Peoria.

Our technicians can perform repairs, maintenance, and new system installations for any size home or business. Call today for a free estimate! At Desert Diamond Mechanical, we accept cash, Mastercard, Visa, Discover, and American Express. Financing is also available with approved credit.
Business details
  • Year established: 2011
Services
A / C Repair
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For air conditioner repair in Phoenix Metro and surrounding cities, Desert Diamond Mechanical Heating & Cooling is the right choice. Our fully licensed, extensively trained, and regularly updated technicians work tirelessly to earn your satisfaction.
A / C Service
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For essential upkeep of your cooling system in Phoenix Metro and surrounding cities, rely on the experts from Desert Diamond Mechanical Heating & Cooling. As a Trane Comfort Specialist, our technicians are trained, qualified, and consistently updated in the proper procedure to optimize the performance of all makes, models, and styles of air conditioners.
Installation
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When it's time to answer the challenge of winter comfort, Desert Diamond Mechanical Heating & Cooling completes your project on-time, on-budget, and to your specifications. We partner conscientious job performance with proven products to bring you ease-of-management, precision temperature control, and outstanding energy efficiency.
Repair
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There's never a convenient time for a heating malfunction. Fortunately, it's always the right time to call on Desert Diamond Mechanical Heating & Cooling for skilled service. Our highly trained, regularly updated, and fully insured team of technicians are always available to assist you. Contact us anytime, 24 hours a day, 365 days a year, and never pay overtime charges for repair.
Heating
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Don't be tempted to ignore your vital heating equipment. Although it sits idle during those long months of high temperatures, your heating system is still under attack from dust and other contaminants.
Reviews (23)
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C. Di
Jun 18, 2022
I called Desert Diamond Mechanical to get a quote on a new unit. Steve called me back. Took some information, he very professionally answered all my questions. Within 15 min or so he emailed me several options( different options are always good). I Would highly recommend based on the professionalism alone. P.S so it turns out my best option was to replace system.

Desert Diamond Mechanical was great they scheduled an install right away ( 3 days ). Install was today. I am extremely impressed with the team of professionals that work at Desert Diamond Mechanical, the installers Estevan and Dennis where great they said I would have service in 6 hours and I did. I also asked them to get me info on insulation and Steve Schilling stopped by just as they finished up and gave me 2 options of estimates. I really like the way Desert Diamond Mechanical does business, and I highly recommend them.
Photos Liberty Awnings & Shades
Jun 18, 2022
Matt arrived early (with a call ahead to see if I was available), assessed the issue quickly and had a repair estimate for me within 20 minutes. After I approved the repair, he was able to pick up the part and have the A/C unit in my showroom back up and running in less than 2 hours. He saved the company potential days of rescheduling and thousands of dollars in the loss of potential sales because we could not have customers in out showroom until the A/C was working again! Thank you so much! Will definitely recommend and use them again.
Helen I. Johnson
Jun 04, 2022
Tech Branden came out and took care of my air conditioner. I was so grateful, I called about 4:15 pm and he was at my house shortly after 5. The house was beginning to get really warm. Branden was amazing, he was very professional and explained to me everything he was doing, he was very thorough, by the time he left there was no doubt he cared about making the quality of service I received was important.

I am very much a customer type person, I've worked as a customer service job and believe it is very important to provide the service the customer expects. Brendan is a top notch technician, very impressed and totally satisfied. Therefore, I will use this company in the future.
M. S.
May 06, 2022
He showed (Matthew) when expected. I was told by the home inspectors that the heater did not work. It fired right up and he did a check on everything. So he was honest and did not try to sell me new unit like the other person did. Saved me a few thousand! These people are honest and very dependable. I would recommend them to anyone. He also installed new thermostat to replace the old one.

All in less than an hour. Very good people! Second time out. Matthew installed what was needed. Friendly person and knowledgeable. These people are here to help you when you need it. Would always recommend them!
Steve Stanczyk
Apr 19, 2022
I was in need of a complete new system install, heat pump and air handler. During the in home consultation I became aware of attention to detail that the other companies didn't offer so I went with Desert Diamond Mechanical. The technicians that performed the work carried over the same attention to detail. The air handler required additional configuration to be the most efficient possible and the end result was more even air flow throughout making for a much more comfortable home.

Even the thermostat is high quality and user friendly. The new system is far above what I had and I'm completely satisfied. If someone is looking for attention to detail and a very professional install Desert Diamond Mechanical is an excellent choice.
Ben B.
Apr 06, 2022
After 10 years of bandaging a Carrier system we opted for a new Trane system. I did my research and had 5 bids for the work. Desert Diamond bid was in middle but their attention to every detail is what sold me. There was zero pressure to "buy now". I received plenty of information on schedule time and updates leading up to the install. During the furnace install there was an issue where our dryer was damaged.

The install crew leader was upfront and explained exactly what happened. He mentioned he had already contacted the office to coordinate a replacement. I was extremely pleased with the quick response from the management team and assurance the issue would be resolved quickly. I am glad I chose Desert Diamond for this work and suggest you give them serious consideration for your AC needs.
John Gulick
Feb 22, 2022
Ivan arrived for my service call early and he explained everything in detail. He also went over warranty items on my unit that I was not aware of, saving me hundreds of dollars in repair costs. I am very pleased with Desert Diamond! As a new customer, I have them set for my next annual service. They are certified experts and will give you the best recommendation on repairs or replacement. Do yourself a favor, hire the best HVAC techs' in the valley to work on your system!
Lloyd Larson
Feb 14, 2022
Desert Diamond did a super job replacing our heat pump. Every aspect of this experience was done very professionally. The estimate was top notch and everything was explained in great detail. The job itself went very well. I was quite impressed with the fact that a couple of the managers came out to help the technicians so that they could get done a little early on a Friday after working late the night before.

The inspection after install was also handled very well. Seems to me that they have a great team and I would gladly use them again in the future and would highly recommend them to anyone requiring A/C or.
Denise Conn
Jan 31, 2022
My technician, Joe N was amazing! He set a high standard for great customer service. Joe kept in touch with me prior to my appointment by actually calling me on the phone and speaking with me. He was pleasant, helpful and knowledgeable in his field of expertise. Once he completed his inspection, he explained everything to me. I have two dogs and put them up before he arrived.

Once he got to my home, he told me that he has 4 dogs and he wanted to meet my little ones. My 16+ year old dog is always, I mean always unsure and shy of anyone other than me. Joe was totally welcomed and she immediately let Joe pet her. I would highly recommend this company because they did a good job on the installation of the a/c unit and the price was less than other companies in the area. Thank you Joe!
Desirae Crespo
Jan 17, 2022
Steve from Desert Diamond came out to measure for a new A/C unit. He was friendly and professional. The reason I am leaving a 3 is because he added about an extra $400 to the initial quote. While its not much compared to the $13,000 unit I am having put in, it still makes me leery of signing a contract with DDM. The contract clearly states that I am liable for any and all necessary and unforeseen costs needed to complete the install.

If they are going to add $400 here and $400 dollars there, who knows how much I will end up paying in the end. I am still on the fence about hiring them and am looking into other companies.
Dennis R. Remillard
Jan 15, 2022
I am so greatfull to the company for their professional and speedy service. It has been 3 time prior for checking and repairing our unit. It was old and again I called and they were there same day. This time the unit needs replacing. They also made that affordable and quick to replace. I love this company and their professional technicians. They deserve a big pat on the back for great service!
Christina Thiel
Jan 04, 2022
We called on Christmas Eve about a leak and they were here within 30 minutes! Joe was so friendly and helpful, he went above and beyond! We always have a wonderful experience with this company and anyone who services our air conditioner. Highly recommend them, you won't be disappointed!
Dan McIntyre
Dec 23, 2021
I've been doing business with Desert Diamond for nearly 20 years, when it was just Carlo doing it all. They are very professional and I've never had any issues with them trying to upsell me on something not critically needed. I just had my semi-annual PM service and the tech was Cody. All of the techs are great but I am always impressed with Cody, he goes above and beyond and takes the time to explain what he saw and shows me pictures to back up what he says. He is friendly, personable, and knowledgeable. With employees like Cody on staff I will continue to do business with Desert Diamond.
Jodi Crouch
Dec 19, 2021
This was an AWESOME AMAZING experience using Desert Diamond. The guys were personable, funny, professional and extremely knowledgeable! From the very beginning with inspection, measurements, scheduling to installation. I would definitely recommend. Great crew! Thank you for your services and crew! Services: Duct and vent cleaning, Heating system installation, AC installation
Carlie Morris
Dec 19, 2021
Steve was fantastic! Desert Diamond Mechanical never disappoints. I called in the morning, needing service and they were able to get me up and running the same day. Super friendly and very knowledgeable. Thank you Desert Diamond! 5 stars all around!
Vivian Dore
Dec 19, 2021
The gentleman they sent out, Joe, was very professional and knowledgeable. We absolutely loved the way he spoke with us and made sure we understood what he was doing. We were totally disappointed with the last service company that we had so we're already on guard. Joe put us at ease immediately and followed through with kindness and respect. A GEM in today's world. Thank you for employing such an honest person.
Jane Flach
Dec 14, 2021
Very pleased with this company especially Cody who was the one that originally came out to give me an estimate on cost to replace my 2 AC/ Heat systems. Very personable and honest young man. Scheduled the work within a couple days of accepting their estimate. The workers came on time and finished the entire job the same day by mid afternoon. Hopefully everything will work as it should. Very pleased with Cody stopping by while his workers were installing system and answering any questions I had.
Mindy Nethery
Nov 23, 2021
We've had a maintenance plan with Desert Diamond for a few years, and they've always been fantastic. Just completed our winter maintenance, and Joe was great! He was super knowledgeable and nice! He made sure to mention a few things to keep an eye on so we keep our system running and in good condition. Their team is always on time and has never missed an appointment. I would highly recommend this company to anyone looking for reliable a/c service!
Mimi Dolan
Apr 12, 2016
This company is top notch! I really wanted TRANE HVAC units as my last set lasted 28 years with 1 minor service call. I also wanted a group who installed a lot of new units and not just services them.
Pat Sherrod
Jan 20, 2016
I contacted Desert Diamond for an estimate on a new unit. The company sent Steve to my home who inspected my unit and gave me an estimate. After calling several companies and getting many estimates, Steve matched the price of another company, and I was very pleased with his professionalism.
Jean Glass
Dec 19, 2015
I purchased a new home last year and wanted to have a maintenance contract in place for my heating and cooling system. The previous contractor I worked with was unsatisfactory. A good friend recommended Desert Diamond Heating & Air, so I scheduled an appointment with them to do my winter tune-up.
Gabriela Jimenez
Dec 04, 2015
We where looking for a company that could do duct work and repair for SRP rebates, we also got a consultation for our system. They answered all our questions, they look into different options within our budget, and we decided to buy a new system with them.
Mark Cline
Aug 25, 2015
We were impressed with the professional presentation by Steve Schilling. He was very thorough and explained our choices for a new split system ac and gas heater. He ultimately presented the best quality unit at the best price and provided pictures and model numbers right down to the Honeywell thermostat.