Desert Diamond Air Cooling & Heating

Desert Diamond Air Cooling & Heating runs its plumbing operations from Phoenix, Texas. The company focuses on residential plumbing work for local homeowners who deal with the demands of Texas weather and older housing stock. Crews respond to calls for everything from routine maintenance to urgent fixes, using their knowledge of how heat, occasional freezes, and hard water affect pipes and fixtures. They cover the Greater Phoenix area with trucks ready for same-day service and keep parts on hand to avoid delays on common jobs like line replacements or fixture swaps.

Plumbers from the outfit handle drain clearing, water heater repairs, leak detection in walls and slabs, and full repiping projects when corrosion sets in. They trace issues with cameras before digging or cutting, then restore water flow without tearing up more than necessary. Homeowners often call after noticing low pressure or slow drains caused by mineral buildup from the local supply, and the team installs new valves or flushes systems to get things running right again. Work starts with a clear walk-through of the problem, followed by upfront time and cost estimates so there are no surprises once the tools come out.

Customers keep coming back because the jobs finish on schedule, the fixes hold up through the seasons, and the bills match the quotes every time. Reviews highlight fast arrivals even on weekends, clean job sites at the end of the day, and straightforward talk about what needs doing versus what can wait. That steady record of reliable results and honest dealings adds up over thousands of completed calls. DIRT Score 4.87 from 2522 reviews on Finds.

DIRT Score = confidence-weighted rating across verified review platforms. How is this calculated? →

“The installation of the new mini-split system in my garage was: high quality, clean, professional and very friendly! No unpleasant surprises at all! I highly recommend this company and we will sign up for their incredible Diamond Service Plan!”

“I had a great experience with Johaan from Desert Diamond Air. He came out to diagnose a low-performing AC unit and was incredibly thorough. He carefully inspected the outdoor condenser and then checked the evaporator coil to accurately pinpoint the issue. Johaan was highly professional throughout the entire visit and provided clear, practical solutions to get the system running efficiently again. He also took the time to answer all of my questions completely. I highly recommend Desert Diamond Air and will definitely ask for Johaan again for future service!”

“I want to take a minute and write about the amazing service and assistance we received today from Daniel Calderon. I called this morning when I noticed the house wasn't cooling (only going to be 114 degrees today). The front office staff was able to schedule a technician for this afternoon. I let them know that I could be available a bit earlier than the scheduled time and they reported Daniel would be aware and would contact me if he could be here earlier. I received a call an hour before the scheduled time letting me know that he was on his way. Once he arrived, he immediately noted the system was not cooling and went onto the roof to identify the issue. He quickly identified that a part had failed and needed to be replaced. He notified me that the part was under warranty and they would ”

“Craig did the inspection and quoted me different AC units. He understood my needs and budget, and provided the best quote between 3 companies for same models. He answered calls and text when I had questions. Brody and Joshua did the install, including a new thermostat and new vent. Fine young, hard working folks. Highly recommend them!!”

“INSTALLATION: 4-22-2026: Shawn and Alex did a great job installing my new DAIKIN AC unit They were professional, patient, respectful of my property and knowledgeable about the unit. They explained how the thermostat works, answered my questions, and made sure the install was perfect before leaving. I do wish they'd worn shoe covers as the estimate guy Craig did. Also, the crane (3rd party vendor) was almost FIVE hours late - not their fault, but this did slow the project's progress. Alex and Shawn, made the most of their time, did all the pre-installation / setup work on my roof while waiting for the crane to arrive. The DAIKIN unit is running quietly & smoothly. Next week another employee will inspect the installation to ensure all was done correctly and the unit is running per spec. NO”

“Desert Diamond replaced two 5-ton AC units for us this week and from start to finish they were straightforward, knowledgeable and efficient. The sales rep Tyler answered all of my questions clearly and took his time explaining his answers. He responded quickly along the way and was a pleasure to work with. The crew on install day were friendly, efficient and did a great job cleaning up after their work. We got four quotes before deciding who to go with and I'm glad we went with them.”

“This company has been great from start to finish. I’ve been using them for a year and I couldn’t be happier with the support I get from them. My system is old and the technician Leo was more than upfront and honest with everything that was wrong and made me feel comfortable with fixing what needed to be fixed. I am so glad that I found these guys because I will be using them as long as I live here!”

“UPDATE: This breakdown is entirely new to me. In the video, your technician explicitly states that the part cost COULD BE LOWERED TO $555 IF we signed up for the PM plan. However, the invoice itself contains no itemized breakdown to support the pricing now being presented. We also asked whether we could source the part ourselves at a lower cost and were told no. We were informed that the only way to receive any discount on the part was by enrolling in your program. While prior PMs may have been scheduled, no technician was on site during the original PM plan. Additionally, the labor hours you’ve provided do not align with reality. I have this on video as well. The technician was on site for a total of 3.5 hours. At no point were we informed that we would be billed for time spent sourcin”

“Our Tech Mike from Desert Diamond Air and Plumbing clean, courteous, quiet, and professional as he performed his PMI on our 3 AC systems. We knew one of the 3 units was struggling and fully expected a hard sale on it needing to be replaced, but were pleasantly surprised with an honest assessment explaining exactly what was going on with 3 different treatment options followed up with an email with almost 40 pictures of everything he checked and repaired during his visit. Truly appreciate the customer service and professionalism Mike and the office provided, so much so that we signed up for a service agreement which is something we never do.”

“I wanted a locally owned HVAC company to do AC service ahead of summer. God knows how hot it can be here in summer. I was pleased to experience the honest service offered by Desert Diamond Air. Dominic arrived as scheduled, did the service checks and kept me informed about my 9 year old system performance discussing improvements with pictures before and after. I was impressed by his honesty. After he had installed a part that did not improve function he showed me that it made no difference and then removed it. I opted to sign up for the service plan. I have no hesitation in recommending Desert Diamond to anyone.”