We maintain, repair and replace all brands of air conditioning systems

Since 1959 D&H AC provides Tucson homes and businesses with air conditioning repair, A/C maintenance and A/C installation services. Our NATE-certified technicians are trained to repair air conditioning systems of any brand and any age, in a rush and all year long.

When your system needs repair, we will perform a diagnostic evaluation so that the cause of the failure will be accurately detected and fixed. This saves you money by preventing further repairs.

Call us to enquire about a new A/C installation: we will perform an in-home or business survey of your current air conditioning system and its usage. This allows us to determine together which AC system is best-suited to your needs.

Lastly, we provide top air conditioning maintenance services with NATE-certified technicians.

Angie's List Super Service Award 2017

When it’s time for heating and heaters…

We don’t often think about furnace and heater maintenance and installation in Southern Arizona. However, if you have endured a local winter then you know that freezing occurs and optimum furnace and heater operation is essential.

Our NATE-certified technicians are highly trained on the many different types/brands of heater and furnace equipment. Whether your furnace is brand-new or twenty years old, our team will use its knowledge and experience to help increase its longevity.

If it is time to replace your heater, ask our service technicians or Comfort Advisors about possible lifetime warranties on heat exchangers. Click here to find out more about our gas heating furnaces.

Guardian Air Conditioning Maintenance Plan

Click on the logo to see the full benefits!

Our air conditioning maintenance plan, GUARDIAN, makes a lot of “dollar sense”.

Our guardians detect issues BEFORE they occur. The Guardian Planned Maintenance prevents system failures, avoids costly repairs, lowers energy costs and extends equipment life.

Call us to help prevent system failures: (520) 408-2665.

D&H Air Conditioning Company, Inc., Air Conditioning Contractors & Systems, Tucson, AZ


We always strive for improvement and we also appreciate praise. Reviews are your voice to tell us how we did. Please take a moment to cast your vote on any one of these four websites…

Hundreds of positive reviews at the Better Business Bureau, 4.7 stars in Google, 4.9 stars in Facebook, 4.5 stars in Yelp… For 58 years we have made our customers our PRIORITY #1 day after day. We don’t just talk a good game.




Keep your unit tuned up! Prevent costly repairs with proper maintenance. Having the proper maintenance plan also ensures preservation of your manufacturer’s warranty.

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Our technicians can fix the problem. Regardless of when your unit was installed and who installed it. All our technicians are NATE certified, the highest level of qualification in our industry.

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Tired of being nickel-and-dimed by your old A/C unit? When you call for your free in-home estimate, ask about our 12-year financing, 12-year equipment warranties. Or about our ‘no-payment, no-interest for 18 months’ plan.

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We are dedicated to providing our customers with outstanding service and expertise. We value our customers’ opinions to know when our processes are working properly and as learning experiences to improve when necessary.

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Receive up to $2000 in discounts and rebates toward the purchase and installation of a new Premier Home Comfort System!

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Brett Wright, President


years in business


satisfied clients


technicians on call



Many home owners mistakenly believe that when their air conditioning system fails, the manufacturer’s warranty automatically covers parts and labor. Yes, it is true but only if the system has been properly maintained all along. Proper maintenance by a qualified professional is a condition required for the warranty to be effective. Proper maintenance is documented by the professional, and under this condition manufacturers will cover most issues due to a defect in the unit. In many cases however, manufacturers stipulate in the documentation given to home owners that a lack of proper maintenance VOIDS their warranty. This could mean thousands of dollars of unnecessary expenses for the home owner.
D&H Air Conditioning offers a comprehensive maintenance program covering all the air conditioning units installed by ourselves OR by other installers. When we install an air conditioning system, we offer home owners to roll the cost of the maintenance program directly into the cost of the unit. But even if your unit has not been installed by our technicians, we still offer the same comprehensive maintenance program for your unit. Certain restrictions can apply, however. Call us at 408-2665 and ask for a specialist of the Guardian Planned Maintenance program.


  • Preserves manufacturer’s warranty
  • Priority status for the beneficiary
  • Lower utility bill due to higher efficiency
  • 15% discount on repairs (parts & labor)
  • Never an overtime charge
  • Agreement is transferable
  • Extends equipment life
  • 24-hr emergency service
  • Fewer repairs needed
  • Improves capacity
  • Inflation protection


For about $0.50 a day, D&H AC protects your investment in your air conditioning unit by inspecting it
twice a year, and checking out all the following items:

Air Conditioner & Heat Pumps

  • Cleaning of condenser oil
  • Inspection of blower, lubrication as needed
  • Verification of refrigerant charge
  • Inspection of pulleys & belts
  • Calibration of thermostats
  • Lubrication of all moving parts
  • Cleaning of motors
  • Recording of temperature differentials
  • Testing of capacitors
  • Cleaning of condensate drain
  • Tightening of electrical connections
  • Inspection of power disconnect
  • Check of defrost timer
  • Testing of reversing valve (heat pumps)
  • Test compressor
  • Check contactor
  • Check relays

Furnace & Air Handler

  • Visual inspection of heat exchanger
  • Inspection of blower, lubrication as needed
  • Inspection of thermocouple/hot surface igniter
  • Testing of safety controls
  • Cleaning, adjustment & testing of ignition system
  • Check of gas leaks
  • Inspection of flue pipe
  • Check & adjustment of manifold pressure
  • Cleaning of air return plenum
  • Testing of carbon monoxide


Spring Service of a Daikin A/C Unit – Part 1

Spring service of a Daikin Gas Package. In this short introduction video — followed by other videos showing the full process — our Comfort Pro technician Jacob, introduces viewers to the unit to be serviced and the parts to be examined…


Spring Service – Daikin A/C Unit – Part 2

Spring service of a Daikin Gas Package. In this Part 2 of our educational video series on air conditioning repair and maintenance, our Comfort Pro Specialist Jacob explains what he is checking out on some of the elements of the system.


Spring Service Daikin A/C Unit – Part 3

Spring service of a Daikin Gas Package. In this 3rd part of our video series on servicing a Daikin A/C unit, our Comfort Pro specialist Jacob makes a couple of interesting recommendations: (A) adding a surge protector to a unit will warranty it in case of a breakdown due to a power surge; (B) a compressor saver will bump up the SEER rating of the unit.


Maintenance Daikin Heat Pump – Part 1

Jacob, one of our Comfort Pros, is about to start the spring maintenance on this Daikin heat pump. He covers the diagnostics he will run and the system elements to be covered by this routine maintenance check


Maintenance Daikin Heat Pump – Part 2

Our Comfort Pro specialist Jacob is proceeding with the spring maintenance check of this Daikin Heat Pump. Regular maintenance as recommended by the manufacturer is vital to maintain the warranty of the unit in full force. D&H AC offers homeowners the Guardian Maintenance Plan to ensure that proper maintenance procedures are followed, and that maintenance costs remain very moderate.


Maintenance Daikin Heat Pump – Part 3

In this 3rd and final installment of our video series covering the maintenance of a Daikin heat pump, our Comfort Pro specialist Jacob concludes the inspection by giving the A/C unit a clean bill of health. All systems go. It is vital that such maintenance checks be carried out at the frequency recommended by the manufacturer. Lack of maintenance or insufficient maintenance will void the manufacturer’s warranty.


Final clean-up inspection after repair of a Daikin A/C unit

Clean-up inspection time: In this real-time video inspection and repair of a Daikin air conditioning unit, our Service Professional makes sure that the work area and the unit are clean before he leaves the roof. Cleaning up is the last step of an air conditioning maintenance and repair intervention: leaving a unit clean and a site in…



Air Conditioning Maintenance, Repair and Installation Experts in Tucson Since 1959


D&H Air Conditioning & Heating
AC repair, maintenance and installation

3629 N Oracle Road
Tucson, AZ 85705

Phone: 5204082665
Fax: 5208876204

Office Hours of Operation:

Mon – Fri:
8:00 AM – 5:00 PM

8:00 AM – 2:00 PM

Service Hours:
Mon – Sun : 24 hours

AZ ROC# C-79 #070188 / C-39 #076494


Free estimates:
reception [at] dandhac.com

Service Requests:
service [at] dandhac.com

Service Manager:
servicemgr [at] dandhac.com

General information:
reception [at] dandhac.com

Our NATE-certified air conditioning technicians serve homes and businesses in the following cities: Tucson, Casas Adobes, Oro Valley, Marana, Vail, Green Valley, Saddlebrooke, Tubac, Sahuarita, Benson, Catalina, Oracle, San Manuel, Mammoth, Rio Rico, Nogales, Sonoita, Patagonia, Huachuca City, Sierra Vista, Tombstone, Eloy, Arizona City, Casa Grande, Florence and communities in-between.

Our A/C maintenance programs are designed to ensure your manufacturer’s warranties are preserved and your air conditioning system runs efficiently.

Our service technicians are North American Technician Excellence (NATE) certified. This certification gives you access to service technicians with verifiable knowledge of air conditioning, air distribution, heat pumps, gas heating, oil heating, hydronics gas, hydronics oil, light commercial refrigeration and commercial refrigeration.

The professionalism of our technicians is continuously developed through training programs focusing on customer service.

Our commitment to client service, professional training and quality control procedures has been a cornerstone of the success D&H Air Conditioning has enjoyed in Tucson and Southern Arizona for over 58 years.