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Diamond AC and Heating

HVAC contractor in Phoenix, AZ.

In Diamond AC and Heating's own words

Diamond AC and Heating is a family-owned HVAC company based in North Phoenix, keeping homes and businesses comfortable across the Valley since 2008. Our NATE-certified technicians handle AC repair, AC tune-ups, new AC and heat pump installation, ductless mini-splits, furnace and heating repair, ductwork, and indoor air quality upgrades. We serve Phoenix, Scottsdale, Glendale, Peoria, Tempe, Mesa, Chandler, Gilbert and nearby communities. Calls are answered 24/7, with same-day service available 7 days a week. Every job comes with honest upfront pricing, written quotes, and a 100% satisfaction guarantee.

Trade
HVAC contractor
Business address
20801 N 19th Ave #1, Phoenix, AZ 85027
Telephone
(602) 753-5375
Website
diamondacandheating.com
Hours
  • MondayOpen 24 Hours
  • TuesdayOpen 24 Hours
  • WednesdayOpen 24 Hours
  • ThursdayOpen 24 Hours
  • FridayOpen 24 Hours
  • SaturdayOpen 24 Hours
  • SundayOpen 24 Hours

From the business's Google listing, checked Oct 2026

Register
AZ register

Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.

Google Reviews

4.5 (771)

  • Josh was great

    Ramona D.

  • Scott D walked us through possible scenarios to update and make our unit more efficient.

    Keith H.

  • Scott D. Good guy to know.

    Faramarz K.

  • Josh was great! Very professional and knowledgable.

    Trevor M.

  • Scott D came out , and did a great service !! Cleaned the unit , recommended some things to help my system run better , will recommend Scott D every time , greet tech

    Edward B.

  • Josh was excellent Diamond is the best company

    Sheryl M.

  • All good Scott Deming was so nice

    Alanna M.

  • I was very pleased and grateful I had Ryan do the sale. He was easy to talk to I felt he was honest fair and willing to answer questions. He gave me time to respond. He called early this am to advise the team would be late. It gave me time to start my day. The team that came Chris and Jordan were also kind pleasant and willing to explain things. They worked fast and efficiently. They didn't bother my dog asked for permission to come in the house. This is a big expensive decision to make quickly. I will gladly promote Diamond AC Polli in Tempe.

    Polli H.

  • Josh did a exceptional job and very friendly

    Angela C.

  • Josh did an amazing job

    Tania H.

  • Scott D. Was very helpful and friendly

    Shirley T.

  • Josh was great

    Iris L.

  • Scott D helped me out with positive feedback and looking forward to working with him and diamond air conditioning again

    Erik N.

  • What an excellent service. Josh L arrived early, very professional, polite, knowledgeable technician. Took great care of my HVAC. I’ve been very pleased with Diamond Air. I’m going to give Josh 🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟 Thank you.

    Janie M.

  • My husband and I had a service call to have our ac system looked at . Josh L was our technician, he was very professional, wore gloves and shoe covers, worked with us on the pricing, and got the job done the same day We really appreciate the great service and would definitely recommend this company to everyone. 5 stars!

    Kelly W.

  • Good job Josh was great

    Joanne T.

  • Roberto was extremely professional and polite. He did a great job and was very efficient in replacing the warrantied part. We really appreciate his work and service.

    Kristina B.

  • Diamond installed a new unit about 2years ago ,about 2 weeks after our maintenance service we had condensate running out of the rooftop unit onto the roof , Scott D repaired the connection of the condensate drain line to the unit.

    marc S.

  • My AC tech scott was super helpful! He not only helped me but was able to teach me some useful tips about AC maintenance!

    brett D.

  • Scott D. did great professional JOB!

    Dianna K.

  • Scott Deming serviced my unit yesterday. Being thoughtful and courteous, he took his time to explain several options to me that would benefit my unit. I wound up getting two devices that would help extend the life of my unit. Good communication and good service. Thank you, Scott.

    frank J.

  • Just had Scott D do a great job servicing our a/c unit! Great guy!

    Mark E.

  • Scott D came out ,did a great job. My AC running stronger thanks to his visit. Highly recommend!!!

    William M.

  • Scott d was very friendly and professional with his work. He was very thorough with his explanations. Highly recommend.

    Ricardo H.

  • Scott was awesome! He provided clear visual perspective of his evaluation. Provided great tips for saving on my energy bill and optimize the function of my system.

    Shawn J.

  • I had Scott from Diamond AC and Heating out to service my HVAC unit. Scott did a great job explaining to me and showing me pictures of my current unit and made recommendations of how to make my existing unit more efficient. I had no problems with the work needing to be done. I had a new roof installed and some of the air wasn’t entering the ductwork after getting the new roof installed. Great communication at a fair price. Highly recommend this hvac company.

    Doug R.

  • Scott D came out and was great, had out system working better than ever before - will recommend to everyone !!! Thank you Scott for your professionalism and courtesy !!

    Jeri F.

  • Steve did my 6 month maintenance. He was very thorough, efficient and friendly. I would highly recommend him

    Holly C.

  • Steve came out to do a routine service today, he was very professional and explained everything. My system was low on freon so he did a leak test but found no leaks. He charged the system and it feels 100% better now than it has since the unit was replaced 4 years ago.

    Kris O.

About Diamond AC and Heating

AC repair and system work in Phoenix

Diamond AC and Heating puts AC repair at the center of its Phoenix work. The family-owned company says it has worked with homeowners and businesses across the Phoenix Valley since 2008, handling air-conditioning installation, heat pump service, ductless mini-splits, heating repair, furnace repair, ductwork, indoor-air-quality work, and maintenance plans.

Its website also names tune-ups for heating systems and work ranging from a single-room mini-split to commercial rooftop equipment. The company says it provides written quotes, upfront pricing, financing, and a 100% satisfaction guarantee.

Phoenix heating and cooling conditions

Electricity is the main home-heating fuel in Phoenix, used by 74% of housing units in 2024, per the American Community Survey. NOAA normals for 1991-2020 put Phoenix's mean temperature at 71.8 degrees F, with an average high of 85.6 degrees F and average low of 58.0 degrees F.

Diamond AC and Heating has a 4.5 rating from 771 reviews and is open 24 hours every day. Reviewers most often mention staff who explain options, complete service work, communicate timing, and treat households considerately.

The company holds Arizona ROC license number 321659, and its technicians are NATE-certified.

The company also describes 24/7 emergency availability for AC, heating, furnace, and indoor-air-quality work.

Services, brands and warranty details come from the company's own website. Ratings, hours and reviews come from Google. Town figures come from the US Census and NOAA.

More HVAC contractors in Phoenix

About Phoenix

Population1,665,481 (2025)
CountyMaricopa County
Average yearly snowfall0 inches
Heating degree days1,307
Most common heating fuelElectricity

Sources: U.S. Census Bureau. NOAA U.S. Climate Normals 1991-2020.