Exceptional Service from Ian S. and Desert Diamond! I have been using Desert Diamond for years (they even installed my new air conditioner a couple years ago) and they have earned my HVAC and Plumbing business forever. Their latest service only solidified why I will never go anywhere else. Ian S. came out to install a water softener system, Reverse Osmosis system, a pressure regulator and some plumbing rework throughout the laundry room for us, and his work was absolutely impeccable. From start to finish, his customer service far exceeded my expectations. He was extremely friendly, personable and so good with my annoying dogs too!! What I appreciated most was his incredible attention to detail. Ian took his time to make sure every single aspect of the installation was perfect, and he left the workspace absolutely spotless. He also took the time to explain everything thoroughly, ensuring we knew exactly how the new systems worked before he left. If you want honest, meticulous, and top-tier service, ask for Ian at Desert Diamond. They truly are the best in the business! And worth every $! read more

See all

Absolutely amazing service!!!from the moment I booked online it was fast and professional!

The whole air-conditioned tun-up inspection went exceptionally great. Arturo is the maintenance technician i would want to do any inspection or any maintenance on my system. He is exceptionally excellent in not only performing his work but just as excellent in letting the customer know what he is doing and how the system is performing. read more

The product is substandard, at best, and does not cool properly in the dog days of summer here in Arizona, but their customer service is top notch. read more

Always pleasant to work with and professional!! I would highly recommend this company for all your A/C needs! read more

Arturo was pleasant, professional and informative. He carefully explained what he was going to do when servicing the HVAC. He also reiterated what he had done when he had finished. read more

Their installation of my new Double A/C system was virtually a work of art. Never saw such a neat job. TOTALLY IMPRESSED!

Sent out an unexpiernced tech to our home they did refund are money cut an un necessary hole in our ceiling just be careful .

Things were going really well until we got to pricing. The technician was definitely knowledgeable and made great recommendations. When I asked him to honor a coupon they had on their website, the tone posture became hostile, I was told to take it or leave it, and unfortunately, nothing was resolved after speaking to their service manager, Joseph. Any reasonable person would look at the coupon on their specials page, with a coupon perforation border printed on, and assume it's a special they are running. If this isn't bait and switch, what is? read more

Desert Diamond Air - Heating & Air Conditioning/HVAC Near Me - Phoenix, Arizona

Daniel C arrived on time with the professional attitude and knowledge I have received time after time from Desert Diamond. I have a maintenance contract and find it well worth the fee. I did need a small job completed but Daniel treated the whole visit as a priority and covered all tasks with the same level of expertise. read more

Absolutely the worst experience I've ever had with a plumbing company. Desert Diamond Plumbing came out, charged me for a diagnostic, and then tried to push an outrageously overpriced repair that made no sense. Instead of offering real solutions, they acted like salespeople, trying to scare me into replacing parts that weren't even broken. Their quote was beyond ridiculous -- thousands of dollars more than what other companies charge, and they only gave me one overpriced option. It was clear they cared more about padding their bill than actually fixing the problem. To make things worse, their customer service was dismissive and unhelpful, and they refused to stand behind their work or the so-called "diagnostic" they charged me for. Do yourself a favor and call literally anyone else. This company preys on people who don't know better. Dishonest, overpriced, and unprofessional. I wouldn't trust them to unclog a sink, let alone handle a major repair. read more

Craig was amazing to work with! When I found out that the coils were rusted out and leaking freon in my old Amana AC unit, I made many calls to many AC companies to get quotes on repairing versus replacing the unit. Craig was one of the only people to call and provide a quote for a new AC unit over the phone. When I called him to come out to finalize the quote, it was spot on from the original quote he provided over the phone. He took the time to ask me my concerns on my current AC set up and provided solutions to those concerns. He thoroughly explained everything they were going to do. He gave me the choice of a 10% discount off the AC unit or a 10 year labor warranty. He was also able to get me 0% interest for 3 years. He was able to get me the best price for a higher model Trane than any other company I called. He was even able to accommodate a last minute schedule change for when the weather was cooler. read more

These guys been out a few times with my units and don't rip people off ... They tell you you DONT need freon etc when they totally could. With prices going thru the roof for everything repair related lately, refreshing change . Keep units / filters clean and units will last longer people ... read more

Desert diamond has always done an excellent job Philip went beyond the call of duty. Even noticed that my dog had taken a poop upstairs and he cleaned it up without being asked just to be nice. I mean that's incredible. Speaks for the quality of the human beings they hire kind nice honest people Just look at their reviews you'll see what I'm talking about. He checked both my units and they're fine. I highly recommend them. They are my first choice for air conditioning always. They're the best! Phillip is one of the kindest people that I've meant from their company! read more

Very professional and knowledgeable staff. Always keeping the customer first. We have used Desert Diamond Air for over 10 years and always have been very satisfied. We continue to be impressed with this company. From service and sales to installation, they have been highly professional and customer oriented. The quality of every aspect of business we have had with them is of the highest caliber. We cannot recommend them highly enough. read more

I had a follow up visit from Steve after an energy efficiency inspection a week earlier. Without any pressure, he explained the issues beautifully. Based on my session with him and the high praise of the energy inspector, I would feel confident in hiring these guys for my HVAC needs. read more

Called for service on a Sunday. Visiting my mom for Mother's Day who is 88 years old. We live out of state. Called Diamond and on a Sunday a wonderful tech named Phillip arrived less than an hour from placing the service call. When we opened the door he had a nice friendly smile-no evidence of unhappiness being called out on a Sunday. Phillip kept up informed while he was up and down on the roof. My moms unit was manufactured in 1986. She keeps getting it repaired and it hangs on. It's only a matter of time until we will have to purchase a new one. Fortunately this time it was only the thermostat. I can't say enough about Phillips obvious passion for his job and his willingness to answer all my moms questions even repeated ones. He was quite informative to me. Laid out the choices when the into goes. And the next morning a comfort specialist from Diamon called and submitted a proposal to us. Will probably go with them. Very fair pricing. Lastly if you need service ask for Phillip. We trusted him the second he arrived. He was professional yet a great conversationalist. If you have Phillip doing your service you can rest assured it's being done correctly. He's very knowledgeable and professional. Thanks Phillip. Hard to find guys like you these days. read more

Great service and very professional customer service Their staff is well trained and show they really care read more

My a/c went out in August, and I called around but everyone was busy. Until Desert Diamond. This past summer was beyond brutal, so I needed the a/c fixed right away. The tech came out and diagnosed the issue to be the capacitor, which would cost $700 to replace. As if I had a choice.... It took about 15 minutes, the tech was nice enough I guess. My main gripe is that all these a/c companies gouge you on a/c repairs. It's not like you can go without or call around and get other estimates. You NEED a/c to be working during the summer. The capacitor costs $16 on Amazon. read more

i've been impressed with Desert diamond since I had a unit installed last year. The ongoing maintenance program is reasonable and I always find courteous servicemen to help me. Today was no different. Timothy was very professional. showed up on time. Gave me some good suggestions and continued my confidence and working with Desert diamond going forward. read more

Everything went well. It started with just calling to say my unit was not cooling well, to getting a service technician out ASAP. The tech was so knowledgeable he diagnosed the problem in no time. He didn't have the parts needed but ordered them and came out as soon as they came in. My home is nice and cool now. I will not hesitate to call Desert Diamond when I need a check up or have a problem. read more

These guys were awesome. Handled my weird air handler issues with great communication. Technician Ossiel worked tirelessly to address my problem. Happy to have a working a/c system again! read more

all the techs are great. unfortunately these companies assume all people have millions laying around for repairs. And not knowing anything about AC, how do i know what coats are approx or not? The last time they came out they told me I needed to service each unit and it was going be almost $4000 for each. I am a single parent and make good money and that's not reachable for me. My 2 units aren't that old and they could not keep up with the summer. I think we all almost died in here....good people but serious price gouging. read more

We called Desert Diamond Air in a panic when our a/c unit stopped working in this AZ summer, they scheduled an immediate "emergency" appointment for us and sent Ossiel to the rescue. The company provided tracking for our technician so we knew exactly when he would arrive! Ossiel was friendly, knowledgeable and honest about what was needed and upfront with how much it would cost. We are so lucky to have found a reliable company in our new neighborhood- thank you!! read more

We had Desert Diamond install 2, 4 ton Daikin Heat pumps and a Daikin Mini-Split in the garage. Their bid was competitive and included a few items that the competing bids didn't include (extra large water pan in the attic, emergency shut-off switch in the pan for excess water). They arrived on time, were very respectful, personable and cleaned up when they were done. So far the system is quieter, appears to cool better. It's too early to tell yet if it's more efficient. We will have to wait for our first bill. We also have less dust in the house. The mini split in the garage really makes a difference. Overall, we are happy with our choice of companies and with the new system. read more

I had a new 5 ton air conditioning unit put in 4/2019 and bought a 5 year warranty with the unit. Bought a separate maintenance contact with them to check out the unit every 6 months. I had another company do a maintenance check up 4/2025. They found the unit to be not running properly , had restricted coolant flow and was running hot. I went back to look at the last report Desert Diamond issued in March,2024 and they told me all was running Great, the numbers showing it had restricted coolant flow was very similar. Called them to have them come out and do their own check on the unit and repair the problem that was present back when it was in full warranty and they refused. Anyone thinking about buying an air conditioning unit or using them for Maintenance, I would say, think twice. If you have a warranty with them, have another company do a check on the unit before the warranty runs out because they will not tell you about an existing problem until you are out of warranty. Buyer/ Be aware. Nick M read more

Sam came to look at our A/C unit on a Friday at 8.30PM. Great time for a failure like that. By Monday he had located the compressor that we needed and on Tuesday morning it was installed and good to go! Thank you Sam and team for great service. I highly recommend Desert Diamond! read more

Tyler is extremely knowledgeable and spent a a significant amount of time assisting us in understanding each of the potential solutions related to our cooling concerns. At no point in the process did we feel any pressure to buy. As expected, we had additional questions arise after Tyler's visit. He was prompt in his responses and consistently made us feel valued. Our decision to purchase has been validated by the incredible post sale customer service. read more

On time. Communicated before arrival. Very respectful and efficient. Explained all procedures and results.

We scheduled a AC check up. We have a very old unit. Ossiel showed up on time (in the service window). He was friendly and efficient. He didn't try to sell us anything that wasn't needed, like a whole new unit. It was our first experience with Desert Diamond and it was great. read more

Desert Diamond is a very professional and capable company. Our existing space for the ac/and heat did not lend itself to a more updated system. Steve was very easy to work with and came out more than once to take measurements in order to give us options for the new system. They completed their work in the timeframe they promised and did a great job. We highly recommend them for any heating and air conditioning needs. read more

Called Desert Diamond Air for a maintenance tune up to start the summer. They far exceeded my expectations. We will definitely be calling them in the future. Antonio was on time and very friendly. Top notch service read more

Great service & pricing, they have a good follow up for fall & summer service, which is included in the unit price, I purchased a Trane XR16, got rid of 16 year old Goodman, the difference in the units is unbelievable & my APS bill has gone down, won't regret a Trane unit, I am a licensed home inspector In Arizona for last 13 years . read more

See all

Excellent, competent, professional. The Techs are well trained and executed the demo and reinstall as a Team. Quality Control Tech is outstanding ! Thorough, detailed, experienced, double checked the installation. This individual truly represented Ownerships Interests. Excellent in so many ways. I am already referring Desert Diamond to friends and Clients. John F Metz Service: Install AC read more

AC went out at 1030pm, in August in Arizona. Our house was up to 92 degrees!! So we called Desert Diamond Mechanical at 8am. They sent a tech same day - only a $70 charge and part of that is credited if you fix something. Steve S., an amazing tech shows up in full protection. Mask and show covers. He was very professional and found out the issue within 5-10 minutes. We are renters so he called the landlord and explained it all to her. He then talked to her family member who had more questions. He was nice and really cares that people make the right choices. He gave the option to fix and was realistic of what the could mean or the options for replacement AC. We chose to fix the problem. He said it would be a few hours, but he was done quickly and the air clicked on. Oh what an amazing sound!! Within 10 minutes you could feel that it was on, still hot but improving. One invoice was paid we got a immediate receipt with pictures of the problems, this is part of their inspection. Its been 3 hours -- house is cooling amazingly. I could not say enough good things about Steve S. and Desert Diamond Mechanical!! We will call them for all needs that they service! read more

Timothy did an excellent job with the regular maintenance of our HVAC system. He was punctual, friendly, knowledgeable, and thorough. Highly recommend Desert Diamond and Timothy. Happy Campers here. read more

We had a problem with our furnace not heating. Julio came out and did investigative actions and then some research to determine the motherboard had gone bad. He then had to do more research to find a part as our furnace is eight years old. Fortunately, one was still available with a shipping time of a week. We were contacted when the part arrived and the visit was scheduled within two days. Julio came back out and took great care to ensure the part functioned as intended doing multiple checks. He was courteous and thorough. read more

My technician was Julio. He walked me through everything he was going to do and then took time to educate me on what he found. He used pictures, data, and technical specs to give me exact information. He then provided very clear options and was upfront about pricing and timing. The initial experience with Desert Diamond was very impressive.. read more

They were responsive, thorough, and efficient. And their price for our new unit was thousands less than a competitor. read more

Desert Diamond Air - The new unit flying into position! - Heating & Air Conditioning/HVAC Near Me - Phoenix, Arizona

Desert diamond has incredible service! I noticed our ac wasn't working around 10 o'clock at night, I called and an operator answered right away and took down my information to have a tech come out the following day. Not only did they come out in the morning, the tech Ismael was able to determine the problem and got it fixed on the spot. The services are professional, timely. I would highly recommend this company for your ac needs! read more