
HVAC & Plumbing in Mesa, AZ
Proudly Serving the Valley
Donley A/C & Plumbing has provided expert plumbing, AC, and heating services in Mesa since 1976. We serve both residential and commercial customers with long-lasting, energy-efficient solutions. You can count on us for comprehensive service, including 24/7 emergency service. If it’s time to resolve a leak, replace a heating system, or repair an AC unit, choose Donley A/C & Plumbing for exceptional service.
Contact our team today to schedule plumbing, AC, or heating services in Mesa, AZ.


How Can We Help You?

HVAC Services
A common mistake homeowners make is not worrying about their HVAC systems until there’s a problem. You can enjoy reliable heating and cooling year-round through routine HVAC maintenance and prompt repairs. We service and install central air conditioners, heat pumps, furnaces, ductless mini-splits, and more.
Air Conditioning
When temperatures rise in Mesa, AZ, Donley A/C & Plumbing will be ready to handle your cooling needs. We offer these AC services in Mesa:
- AC repair: We can fix your air conditioner, whether the issue is minor or complex.
- AC maintenance: Schedule an annual AC tune-up to extend your system’s lifespan and improve performance.
- AC installation and replacement: Rely on our experts to install or replace your cooling system.

Comfort You Can Count On. Service You'll Want to Share.
We Do It Right, Guaranteed.
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“Josh Jimenez is about the best plumber we've ever had, and we have lived in a lot of homes. He is a great listener, thinker and doer. He solved our concerns quickly and with follow through.”- Katherine W.
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“I can't say enough about the amazing professionalism and help that I received when my AC unit needed to be replaced. Everyone was kind and took the time to answer many questions. They were honest, punctual, and knowledgeable.”- Linda W.
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“If you are looking for someone who does high-quality work at very reasonable price Donnelly, AC and plumbing is the way to go! Jose Felix did a kick ass job. He checked everything and fixed it as he went that that he found.”- Glenn G.
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“Donley provided expert advice at a price thousands less than another company. Sean was great, respectful and did a great job for us. Highly recommend this company.”- Kimberly B.
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“We’ve used Donley Services for 7 years and found them to be responsive, thorough, and never pushy about buying unneeded products or services. It’s hard to find reliable service techs. Look no further.”- Peter T.
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“Isidro was fantastic. Evaluated the problem, gave an estimate and the job was completely in a timely manner. He was very polite and verified which type of valve we wanted before installation. We will call Donley for any future services needed.”- Margie S.
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“The recent freeze broke a pipe on my roof. The team at Donley Plumbing came out the following day and did a great job fixing the pipes on my older home. Josh was great to work with.”- Jason B.
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“I have been with Donley for over 25 years. They offer professional services from the office staff to the technicians. Their prices are more than fair. They are trustworthy and honest. Wonderful people to work with.”- Sharon F.
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“We contacted Donnelly for on after hours emergency plumbing issue. Eric was a true professional! He was thorough and explained his findings in layman’s terms putting our minds at ease.”- Kathy G.
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“- Dennis C.
The whole crew did an excellent job. They were very prompt, the install was clean and obviously effective as the house immediately began to cool. Derrick managed the process very well and kept me updated on the progress.
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“Donley is the best! Came out after hours on a Friday to fix our AC. Milad was very knowledgeable and was able to make the necessary repairs quickly.”- Erin R.
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“Seth was very clear in explaining how he would fix our outdoor faucets, the reverse osmosis system and the cost to do so! Seth was on time and completed the work quickly and efficiently!”- Pat E.
Why Choose Us?
Donley A/C & Plumbing serves homeowners and businesses throughout Mesa and surrounding areas, and we’ve been doing it for over four decades. We’re reliable experts who pride ourselves on honest and timely service you can count on. Our team is well-established in the community and takes an active role in local charities. We offer appointments Monday through Sunday and are available 24/7 for emergencies. Our company also provides no-obligation second opinions, free installation quotes, and flexible financing options subject to credit approval.
Request an appointment online or call Donley A/C & Plumbing today.
